WO2020010487A1 - 一种小区切换方法以及相关设备 - Google Patents

一种小区切换方法以及相关设备 Download PDF

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Publication number
WO2020010487A1
WO2020010487A1 PCT/CN2018/094990 CN2018094990W WO2020010487A1 WO 2020010487 A1 WO2020010487 A1 WO 2020010487A1 CN 2018094990 W CN2018094990 W CN 2018094990W WO 2020010487 A1 WO2020010487 A1 WO 2020010487A1
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WIPO (PCT)
Prior art keywords
base station
target
frequency resource
source base
destination
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PCT/CN2018/094990
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English (en)
French (fr)
Inventor
李彦良
周海飞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880095445.9A priority Critical patent/CN112400340B/zh
Priority to PCT/CN2018/094990 priority patent/WO2020010487A1/zh
Publication of WO2020010487A1 publication Critical patent/WO2020010487A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and in particular, to a cell switching method and related equipment.
  • Each frequency band is defined in the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UMTS) terrestrial radio access network (E-Utran) in the 3rd Generation Partnership Project (3GPP) agreement Correspondence between frequency and frequency.
  • 3GPP 3rd Generation Partnership Project
  • the MFBI cell In the MFBI cell, two frequency bands can be supported at the same time, one is the master frequency band and the other is the slave frequency band.
  • the working frequency of the MFBI cell is in the overlapping area of the master frequency band and the slave frequency band, and the terminal that supports MFBI is in the process of switching to the MFBI cell.
  • the frequency of switching error frequencies may occur.
  • the frequency band supported by the terminal is located in the primary frequency band of the MFBI cell, but the MFBI cell switches the terminal to the secondary frequency band of the MFBI cell, or the frequency band supported by the terminal is located in the secondary frequency band of the MFBI cell, but the MFBI The cell switches the terminal to a main frequency band of the MFBI cell.
  • Embodiments of the present invention provide a cell switching method and related equipment capable of improving cell switching accuracy.
  • a first aspect of the embodiments of the present invention provides a cell handover method, including:
  • Step A The source base station determines a target frequency resource.
  • the target frequency resource is a frequency resource to be switched by a to-be-switched terminal requesting a handover from a source cell to a destination cell
  • the source base station is configured to serve the source cell
  • the destination cell is served by the destination base station.
  • Step B The source base station sends a target frequency resource indication message to the destination base station.
  • the target frequency resource indication message is used to indicate the target frequency resource.
  • Step C The source base station receives an instruction message sent by the destination base station.
  • the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the source base station can send a target frequency resource indication message to the destination base station, and the destination base station can determine the target frequency to be accessed by the terminal to be switched according to the target frequency resource indication message.
  • the target base station identifies the target frequency resource to be accessed by the terminal to be switched, and when the terminal to be switched initiates the target cell access, the terminal to be switched can directly access the target frequency resource. This improves the accuracy of the terminal to be handed over to access the destination cell, effectively avoids the possibility of the terminal to be handed over accessing the wrong frequency resource, improves the success rate of cell handover, and reduces the delay of cell handover.
  • the step A specifically includes:
  • Step A11 The source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • Step A12 The source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target main frequency band, and if so, performs step A13;
  • Step A13 The source base station determines that the target frequency resource is the target main frequency band or the target main frequency point.
  • the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target main frequency band, the source base station determines that the target frequency resource is the target main frequency band or the target main frequency Point, the target main frequency band is one of the at least one main frequency band supported by the target cell, and the target main frequency point is a frequency point corresponding to the target main frequency band.
  • the source base station when the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target main frequency band, the source base station may directly determine that the target frequency resource is The target main frequency band or the target main frequency point, thereby determining the target frequency resource accessed by the terminal to be switched during cell switching according to the frequency point supported by the terminal to be switched, and improving the access of the terminal to be switched.
  • the accuracy of the target cell effectively avoids the possibility of the terminal to be switched from accessing the wrong frequency resource.
  • the step A specifically includes:
  • Step A21 The source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • Step A22 The source base station determines whether the frequency point supported by the terminal to be switched is located in the frequency range of the target secondary frequency band, and if so, executes step A23.
  • Step A23 The source base station determines that the target frequency resource is the target slave frequency band or the target slave frequency point.
  • the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target slave frequency band, determines that the target frequency resource is the target slave frequency band or the target slave frequency band.
  • the target slave frequency band is one of the at least one slave frequency band supported by the target cell, and the target slave frequency point is a frequency point corresponding to the target slave frequency band.
  • the source base station may directly determine the target frequency resource as the target. From the frequency band or the target slave frequency point, according to the frequency point supported by the terminal to be switched over, the target frequency resource accessed by the terminal to be switched over during cell switching is improved, which improves the access of the terminal to be switched over to the target cell. Accuracy, effectively avoiding the possibility of the terminal to be switched accessing the wrong frequency resource.
  • the step A specifically includes:
  • Step A31 The source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell.
  • Step A32 The source base station determines whether the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band at the same time. If yes, step A33 is performed.
  • Step A33 The source base station determines that the target frequency resource is the target main frequency band or the target main frequency point.
  • the source base station determines that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band
  • the source base station determines that the target frequency resource is the target master frequency.
  • Frequency band or target primary frequency point the target primary frequency band is one of the at least one primary frequency band supported by the destination cell
  • the target slave frequency band is the at least one secondary frequency band supported by the destination cell
  • the target master frequency point is a frequency point corresponding to the target master frequency band.
  • the source base station when the source base station determines that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band, the source base station can directly determine the target frequency.
  • the resource is the target main frequency band or the target main frequency point, so that the target frequency resource accessed by the terminal to be switched during cell switching is determined according to the frequency point supported by the terminal to be switched, which improves the access of the terminal to be switched.
  • the accuracy of entering the destination cell effectively avoids the possibility of the terminal to be handed over accessing the wrong frequency resource.
  • the step A specifically includes:
  • Step A41 The source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • Step A42 The source base station creates a priority list.
  • the priority list includes a plurality of frequency bands supported by the destination base station, and the plurality of frequency bands are created according to the carrier aggregation CA between the terminal to be switched and any one of the plurality of frequency bands.
  • the transmission bandwidth is sorted in descending order;
  • Step A43 The source base station determines that the target frequency resource is a frequency band having the highest priority in the priority list, or the target frequency resource is a frequency band corresponding to the frequency band having the highest priority in the priority list. Frequency.
  • the source base station may create the priority list, so that the source base station may determine that a target frequency resource to be accessed by the terminal to be switched is the highest priority in the priority list.
  • the target frequency resource is the frequency point corresponding to the frequency band with the highest priority in the priority list, while ensuring the speed of data transmission, it also improves the access of the terminal to be switched to the The accuracy of the destination cell effectively avoids the possibility of the terminal to be handed over accessing the wrong frequency resource.
  • the step B specifically includes:
  • Step B11 The source base station configures a handover request message.
  • the handover request message is used to instruct the terminal to be handed over to switch to the destination cell, and the handover request message includes the target frequency resource indication message;
  • Step B12 The source base station sends the handover request message to the destination base station through an X2 interface.
  • the source base station when the source base station determines the target frequency resource, the source base station can send a handover request message to the destination base station, and the handover request message carries the handover request message.
  • Target frequency resource indication information so that the target base station can accurately determine the target frequency resource to be accessed by the terminal to be switched according to the handover request message, thereby improving the accuracy of the terminal to be switched to access the target cell. It can effectively avoid the possibility that the terminal to be switched accesses the wrong frequency resource.
  • the step C specifically includes:
  • Step C11 The source base station receives a handover request response message sent by the destination base station through an X2 interface;
  • the source base station can receive a handover request response message sent by the destination base station through the X2 interface, where the handover request The response message is used to indicate that the destination base station has successfully received the handover request message, and the handover request message includes the target frequency resource indication message and the indication message;
  • the method shown in this aspect further includes step D.
  • the source base station sends the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to switch to the target frequency resource according to the target frequency resource indication message.
  • the target frequency resource of the target cell is not limited to the target frequency resource indication message.
  • the source base station When the source base station determines that the terminal to be handed over can access the target frequency resource, the source base station can send the target frequency resource indication message to the terminal to be handed over.
  • the step B specifically includes:
  • Step B21 The source base station sends a handover instruction message to the mobile management entity MME through the S1 interface.
  • the source base station may send a handover indication message to the MME, where the handover indication message includes the target frequency resource indication Message, so that the MME sends a handover request message to the destination base station through the S1 interface, where the handover request message includes the target frequency resource indication message.
  • the step C specifically includes:
  • Step C21 The source base station receives a handover request response message sent by the MME through an S1 interface;
  • the handover request response message includes a target frequency resource indication message and the indication message;
  • the method shown in this aspect further includes step E.
  • the source base station sends the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to switch to the target frequency resource according to the target frequency resource indication message.
  • the target frequency resource of the target cell is not limited to the target frequency resource indication message.
  • a second aspect of the embodiments of the present invention provides a cell switching method, including:
  • Step A The destination base station receives a target frequency resource indication message sent by the source base station.
  • the target frequency resource indication message is used to indicate a target frequency resource, where the target frequency resource is a frequency resource to be switched by a terminal to be switched that requests a handover from a source cell to a destination cell, and the source base station is configured to perform Service, the destination base station is configured to serve the destination cell;
  • Step B The destination base station sends an instruction message to the source base station.
  • the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the target base station can determine the target frequency resource to be accessed by the terminal to be switched according to the target frequency resource indication message sent by the source base station, and the target base station can then determine the target frequency resource according to the target frequency resource.
  • the instruction message determines the target frequency resource to be accessed by the terminal to be switched. It can be seen that the target base station identifies the target frequency resource to be accessed by the terminal to be switched, and when the terminal to be switched initiates the target cell access, The terminal to be handed over can directly access the target frequency resource, which improves the accuracy of the terminal to be handed over in the destination cell, effectively avoids the possibility of the terminal to be handed over accessing the wrong frequency resource, and improves The success rate of cell switching, and the delay of cell switching is reduced.
  • the step B further includes: the destination base station receives a handover request message through an X2 interface, and the handover request message And is used to instruct the terminal to be handed over to switch to the destination cell, and the handover request message includes the target frequency resource indication message.
  • the step B further includes: a handover request response sent by the destination base station to the source base station through an X2 interface Message, the handover request response message is used to indicate that the destination base station has successfully received the handover request message, and the handover request message includes the target frequency resource indication message and the indication message.
  • the step A further includes: the destination base station receives the handover request message sent by the mobile management entity MME through the S1 interface,
  • the handover request message includes the target frequency resource indication message.
  • the step B further includes that the destination base station sends a handover request response message to the MME through the S1 interface, so as to Causing the MME to send the handover request response message to the source base station through an S1 interface, where the handover request response message includes a target frequency resource indication message and the indication message.
  • a third aspect of the embodiments of the present invention provides a source base station, including:
  • a determining unit configured to determine a target frequency resource, where the target frequency resource is a frequency resource to be switched by a to-be-switched terminal requesting a handover from a source cell to a destination cell, and the source base station is configured to serve the source cell;
  • the destination cell is served by the destination base station;
  • a first sending unit configured to send a target frequency resource indication message to the target base station, where the target frequency resource indication message is used to indicate the target frequency resource;
  • the receiving unit is configured to receive an instruction message sent by the destination base station, where the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the source base station shown in this aspect is used to execute the method shown in the first aspect of the embodiments of the present invention.
  • the source base station shown in this aspect is used to execute the method shown in the first aspect of the embodiments of the present invention.
  • the determining unit includes:
  • a first determining module configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell
  • a first judging module configured to determine that the target frequency resource is the target main frequency band or the target main frequency point if it is determined that the frequency point supported by the terminal to be switched is within the frequency range of the target main frequency band;
  • the target main frequency band is one of the at least one main frequency band supported by the target cell, and the target main frequency point is a frequency point corresponding to the target main frequency band.
  • the determining unit includes:
  • a second determining module configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell
  • a second determining module configured to determine that the target frequency resource is the target secondary frequency band or the target secondary frequency point if it is determined that the frequency point supported by the terminal to be switched is within the frequency range of the target secondary frequency band;
  • the target slave frequency band is one of the at least one slave frequency band supported by the target cell, and the target slave frequency point is a frequency point corresponding to the target slave frequency band.
  • the determining unit includes:
  • a third determining module configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell
  • a third determining module configured to determine that the target frequency resource is the target master frequency band or the target master frequency if it is determined that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band simultaneously Frequency point, the target primary frequency band is one of the at least one primary frequency band supported by the target cell, and the target secondary frequency band is one of the at least one secondary frequency band supported by the target cell
  • the target main frequency point is a frequency point corresponding to the target main frequency band.
  • the determining unit includes:
  • a fourth determining module configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell
  • a creating module configured to create a priority list, where the priority list includes multiple frequency bands supported by the destination base station, and the multiple frequency bands are according to the frequency of the terminal to be switched and any one of the multiple frequency bands When the carrier aggregation CA is created, the transmission bandwidth is sorted in descending order;
  • a fifth determining module configured to determine that the target frequency resource is a frequency band having the highest priority in the priority list, or the target frequency resource is a frequency band corresponding to the frequency band having the highest priority in the priority list Frequency.
  • the first sending unit includes:
  • a configuration module configured to configure a handover request message, where the handover request message is used to instruct the terminal to be handed over to switch to the destination cell, and the handover request message includes the target frequency resource indication message;
  • a sending module configured to send the handover request message to the destination base station through an X2 interface.
  • the receiving unit is further configured to receive a handover request response message sent by the destination base station through an X2 interface,
  • the handover request response message is used to indicate that the destination base station has successfully received the handover request message, and the handover request message includes the target frequency resource indication message and the indication message;
  • the source base station further includes:
  • a second sending unit configured to send the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to switch to the target frequency resource of the destination cell according to the target frequency resource indication message .
  • the first sending unit is further configured to send a handover instruction message to a mobile management entity MME through an S1 interface,
  • the handover indication message includes the target frequency resource indication message, so that the MME sends a handover request message to the destination base station through an S1 interface, and the handover request message includes the target frequency resource indication message.
  • the receiving unit is further configured to receive a handover request response message sent by the MME through an S1 interface, so that The handover request response message includes a target frequency resource indication message and the indication message;
  • the source base station further includes:
  • a third sending unit configured to send the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to switch to the target frequency resource of the destination cell according to the target frequency resource indication message .
  • a fourth aspect of the embodiments of the present invention provides a target base station, including:
  • a receiving unit configured to receive a target frequency resource indication message sent by a source base station, where the target frequency resource indication message is used to indicate a target frequency resource that is to be switched by a to-be-switched terminal requesting a handover from a source cell to a destination cell Frequency resource, the source base station is used to serve the source cell, and the destination base station is used to serve the destination cell;
  • the sending unit is configured to send an instruction message to the source base station, where the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the target base station shown in this aspect is configured to execute the method shown in the second aspect of the embodiments of the present invention.
  • the target base station shown in this aspect is configured to execute the method shown in the second aspect of the embodiments of the present invention.
  • the receiving unit is further configured to receive a handover request message through an X2 interface, where the handover request message is used to indicate The terminal to be handed over is handed over to the destination cell, and the handover request message includes the target frequency resource indication message.
  • the sending unit is further configured to send a handover request response message to the source base station through an X2 interface, where The handover request response message is used to indicate that the destination base station has successfully received the handover request message, and the handover request message includes the target frequency resource indication message and the indication message.
  • the receiving unit is further configured to receive, through an S1 interface, a handover request message sent by a mobile management entity MME, where the handover request The message includes the target frequency resource indication message.
  • the sending unit is further configured to send a handover request response message to the MME through an S1 interface, so that the MME The MME sends the handover request response message to the source base station through the S1 interface, and the handover request response message includes a target frequency resource indication message and the indication message.
  • a fifth aspect of the embodiments of the present invention provides a base station, which includes a processor and a memory, where:
  • a computer-readable program is stored in the memory
  • the processor runs a program in the memory, and when the base station serves as the source base station, the base station is configured to execute the method shown in the first aspect of the embodiments of the present invention, and when the base station serves as a destination base station The base station is configured to execute the method shown in the second aspect of the embodiments of the present invention.
  • a computer-readable storage medium storing one or more programs.
  • the one or more programs include instructions.
  • the source base station executes instructions such as The method shown in the first aspect of the embodiments of the present invention
  • the instructions when executed by a target base station, cause the target base station to execute the method shown in the second aspect of the embodiments of the present invention.
  • the source base station when the source base station determines a target frequency resource to be switched in and accessed by a terminal to be switched in the source cell, the source base station can report to the destination base station.
  • Sending a target frequency resource indication message for indicating the target frequency resource when the to-be-switched terminal initiates target cell access, the to-be-switched terminal can directly switch to the target frequency resource, which improves terminal access to the The accuracy of the target cell effectively prevents the possibility of the terminal accessing the wrong frequency resource, improves the success rate of cell switching, and reduces the delay of cell switching.
  • FIG. 1 is a schematic structural diagram of an embodiment of a communication system provided by the present invention.
  • FIG. 2 is a schematic diagram of a cell according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of steps in an embodiment of a cell switching method according to the present invention.
  • FIG. 4 is a flowchart of steps in another embodiment of a cell switching method according to the present invention.
  • FIG. 5 is a flowchart of steps in another embodiment of a cell switching method according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a source base station according to the present invention.
  • FIG. 7 is a schematic structural diagram of an embodiment of a target base station provided by the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a base station provided by the present invention.
  • FIG. 1 A schematic structural diagram of an embodiment of a communication system.
  • the communication system shown in this embodiment may be a long term evolution (LTE) of general mobile communication technology as an example.
  • the communication system may include a core network device 101, a source base station 102, a destination base station 103, and a terminal 104.
  • LTE long term evolution
  • the description of the specific number of each device included in the communication system is an optional example and is not limited.
  • the core network device 101 includes a mobility management entity (MME) and a user plane processing gateway (SGW).
  • MME mobility management entity
  • SGW user plane processing gateway
  • the MME belongs to the control plane part and is responsible for the mobility management of the control plane, including user context and mobility status management, and assigning the user's temporary identity.
  • the SGW belongs to the user plane part and is responsible for initiating paging for downlink data in the idle state, and managing and saving IP bearers Parameters and routing information in the network, etc .; the MME and the SGW are connected in a mesh, and one MME can control several SGWs.
  • the core network device 101 and the source base station 102 communicate with each other through the S1 interface, and the source base station 102 and the destination base station 103 communicate through the X2 Interface for communication.
  • the source base station 102 and the destination base station 103 shown in this embodiment may be a base station or an access point for providing services to the terminal 104.
  • the source base station 102 and the destination The base station 103 and the terminal 104 use one or more transmitting antennas and one or more receiving antennas for signal transmission.
  • the terminal 104 shown in this embodiment may also be referred to as a mobile station (MS) or a mobile terminal (mobile terminal). It can communicate with the core network device 101 via a radio access network (RAN). And the terminal 104 may be a mobile phone (or a “cellular” phone), a tablet computer, a personal digital assistant, and a computer with a mobile terminal, and may also be a portable, compact, handheld, computer-built or vehicle-mounted mobile Device.
  • MS mobile station
  • RAN radio access network
  • the terminal 104 shown in this embodiment can perform wireless communication with the source base station 102 in a communication system.
  • the source base station 102 shown in this embodiment can serve a source cell in a geographic area.
  • the destination base station 103 shown in the example can serve a destination cell in a geographic area.
  • the application scenario of the communication system shown in this embodiment is that the terminal 104 is located in the source cell and is connected to the source base station 102. As the terminal 104 moves between different cells, the terminal 104 needs to be switched from the source cell to the destination cell.
  • the destination cell shown in this embodiment is the destination cell where the terminal 104 performs cell switching.
  • the destination cell is a multi-frequency (band-indicator) cell.
  • the destination cell explains:
  • the working frequency of the target cell shown in this embodiment belongs to multiple frequency bands, and the working frequency of the target cell is in the overlapping area of the two frequency bands.
  • the schematic diagram of the target cell is shown in FIG. 2 as an example.
  • the uplink frequency of the destination cell 200 is between 704Mhz and 716Mhz, and the downlink frequency is between 734Mhz and 746Mhz.
  • the uplink frequency and downlink frequency of the destination cell belong to both Band 12 and Band17.
  • the main frequency band of 200 is Band17, and for the same frequency, the frequency points in Band12 and Band17 are different, respectively Earfcn1 and Earfcn2.
  • the terminal 104 needs to satisfy the following conditions:
  • a condition that the terminal 104 needs to satisfy is that the terminal 104 has an MFBI function, and the frequency band supported by the terminal 104 is Band17, where the terminal 104 having the MFBI function is capable of accessing the MFBI The terminal of the cell.
  • Another condition that the terminal 104 needs to satisfy is that the terminal 104 has an MFBI function, and the frequency band supported by the terminal 104 is Band12.
  • the source base station serving the source cell is directed to the purpose.
  • the destination base station of the cell sends a handover request message, and based on the handover request message, the destination base station can only determine that the cell to be switched by the terminal is the destination cell, but the destination base station cannot identify that the terminal is to switch to the frequency point corresponding to the primary frequency band of the destination cell. It is also the frequency point corresponding to the secondary frequency band of the destination cell, which causes the terminal to switch to the wrong frequency point.
  • the target base station serving the target cell can determine whether the terminal is to switch the primary frequency band or the secondary frequency band of the target cell, thereby effectively avoiding the terminal switching the wrong frequency band.
  • Step 301 The source base station determines a target frequency resource.
  • the target frequency resource shown in this embodiment is a frequency resource to be switched by a to-be-switched terminal that requests a handover from a source cell to a destination cell, and the source base station is configured to serve the source cell. The cell is served by the destination base station.
  • this embodiment does not limit the specific process by which the source base station determines the target frequency resource, as long as the target frequency resource is a frequency resource that the terminal requests access to and belongs to the target cell. ;
  • the first alternative is:
  • the source base station may determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • the source base station may determine whether the frequency points supported by the to-be-switched terminal residing in the source cell are within the frequency range of the target main frequency band;
  • the source base station may determine that the target frequency resource is the target main frequency band or the target main frequency point
  • the target main frequency band is one of the at least one main frequency band supported by the target cell
  • the target main frequency point is a frequency point corresponding to the target main frequency band.
  • the second alternative is:
  • the source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • the source base station can determine whether the frequency point supported by the terminal to be switched is located in the frequency range of the target secondary frequency band;
  • the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target slave frequency band, the source base station can determine that the target frequency resource is the target slave frequency band or the target slave frequency point
  • the target slave frequency band is one of the at least one slave frequency band supported by the target cell, and the target slave frequency point is a frequency point corresponding to the target slave frequency band.
  • the third alternative is:
  • the source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • the source base station may determine whether the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band at the same time;
  • the source base station determines that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band, the source base station determines that the target frequency resource is the target master frequency band or the target A main frequency point, the target main frequency band is one of the at least one main frequency band supported by the target cell, and the target slave frequency band is a frequency in the at least one slave frequency band supported by the target cell
  • the target master frequency point is a frequency point corresponding to the target master frequency point.
  • the fourth alternative is:
  • the source base station determines at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • the source base station creates a priority list, where the priority list includes multiple frequency bands supported by the destination base station, and the multiple frequency bands are in accordance with any of the terminal to be switched and the multiple frequency bands.
  • the carrier aggregation CA is created between the frequency bands, the transmission bandwidth is sorted in descending order;
  • the source base station may determine that the target frequency resource is a frequency band with the highest priority in the priority list, or that the target frequency resource is The frequency point corresponding to the frequency band with the highest priority in the priority list.
  • Step 302 The source base station sends a target frequency resource indication message to the destination base station.
  • the source base station when the source base station determines the target frequency resource, the source base station may configure a target frequency resource indication message, where the target frequency resource indication message is used to indicate the target frequency resource, The source base station can send the configured target frequency resource indication message to the target base station, and the target base station can determine the target frequency resource to be switched by the terminal to be switched according to the target frequency resource indication message,
  • the target frequency resource For a specific description of the target frequency resource, refer to step 301, and details are not described in this step.
  • Step 303 The source base station receives an instruction message sent by the destination base station.
  • the target base station When the target base station determines the target frequency resource to be switched by the terminal to be switched, the target base station can configure an instruction message, which is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the target frequency resource is described.
  • the indication message shown in this embodiment is used to indicate that the terminal to be switched can be switched to the target frequency resource.
  • the source base station can send a target frequency resource indication message to a destination base station, and the destination base station can determine the terminal to be handed over to access according to the target frequency resource indication message. It can be seen that by identifying the target frequency resource to be accessed by the terminal to be switched, the target base station can directly access the terminal to be switched when the terminal to be switched initiates the target cell access.
  • the target frequency resource improves the accuracy of the terminal to be switched in accessing the target cell, effectively avoids the possibility of the terminal to be switched to access the wrong frequency resource, improves the success rate of cell switching, and reduces the cell switching Delay.
  • the cell switching method shown in FIG. 4 is exemplarily described.
  • the scenario in which the cell switching method shown in this embodiment is applied is that a base station serving the source cell and a base station serving the destination cell belong to Different base stations, that is, as shown in FIG. 1, the base station serving the source cell is the source base station, and the base station serving the destination cell is the destination base station, and the source base station and the The destination base station has an X2 interface, that is, an X2 relationship is configured between the source base station and the destination base station, so that the source base station and the destination base station have X2 handover enabled.
  • the enabling of X2 handover between the source base station and the destination base station shown in this embodiment means that the source base station and the destination base station exchange required application layer data so that the source base station and The destination base station performs information interaction through an X2 interface.
  • Step 401 The source base station sends a measurement configuration message to the terminal to be switched.
  • the terminal to be handed over is a terminal that needs to be handed over to the destination cell.
  • the terminal to be handed over see the terminal shown in FIG. 1 and FIG. 2. Specifically, in this embodiment, Do not go into details.
  • the source base station serving the source cell may send a measurement configuration message to the terminal to be switched.
  • the measurement configuration message shown in this embodiment is used to indicate Measuring, by the terminal to be switched, the communication environment of the terminal to be switched according to the indication of the measurement configuration message, and reporting a measurement report message to the source base station, and the source base station according to the measurement reported by the terminal to be switched
  • the report message can determine whether the terminal to be switched needs to perform cell switching.
  • the source base station when the to-be-switched terminal establishes a radio bearer with the source base station, the source base station sends a radio resource control (RRC) to the to-be-switched terminal, which may include the source
  • RRC radio resource control
  • the measurement configuration message (Measurement Configuration) configured by the base station is used to control the measurement process of the connection state of the terminal to be switched.
  • the source base station may indicate, through the measurement configuration message, a measurement object, a measurement period, and a measurement condition of the terminal to be handed over that resides in the source cell to perform measurement.
  • the measurement condition is used to instruct the terminal to be switched to measure a measurement object to generate a measurement result, and when the measurement result meets the measurement condition, the terminal to be switched to the source base station Report a measurement report message.
  • Step 402 The to-be-switched terminal sends a measurement report message to the source base station.
  • the terminal to be switched shown in this embodiment After the terminal to be switched shown in this embodiment receives the measurement configuration message, the terminal to be switched can measure the communication environment according to the measurement configuration message.
  • the measurement configuration message may include a measurement event identifier AX for instructing the terminal to be switched to perform measurement.
  • the terminal to be switched may store a corresponding list in advance, and the corresponding list includes different measurement event identifiers AX and Correspondence between different measurement events, so that when the terminal to be switched receives the measurement event identifier AX, the terminal to be switched can determine the corresponding measurement event according to the corresponding list, then the terminal to be switched That is, it is determined that when the measurement event corresponding to the measurement event identifier AX is satisfied, the terminal to be switched reports the measurement report message.
  • An example situation of the first cell handover is as follows:
  • the measurement configuration message configured by the source base station may include a measurement event identifier A4, and a measurement event corresponding to the measurement event identifier A4 is a measurement of a quality of an adjacent cell, and if the quality of the adjacent cell is greater than or equal to the source cell Quality, report the measurement report message.
  • the terminal to be switched can parse out the measurement event identifier A4 included in the measurement configuration message, and the terminal to be switched can be The corresponding list is used to query the measurement event corresponding to the measurement event identifier A4, and the terminal to be switched can perform measurement on the neighboring cell according to the measurement event corresponding to the measurement event identifier A4. If the signal quality of the neighboring cell is greater than or equal to the signal quality of the source cell, the measurement report message is reported.
  • the to-be-switched terminal may report to the source base station that includes measurements The event report A4 and the measurement report message of the physical cell identifier (PCI) of the target cell.
  • PCI physical cell identifier
  • the following describes the specific process by which the to-be-switched terminal determines that the signal quality of the destination cell is greater than or equal to the signal quality of the source cell:
  • the terminal to be switched determines that within a preset time period, the signal quality of the destination cell is greater than or equal to the signal quality of the source cell, and the signal quality of the destination cell is greater than or equal to the signal quality of the source cell.
  • Mn refers to the measurement value of the target cell
  • Ofn refers to the frequency offset of the target cell
  • Ocn refers to the target cell offset
  • Hys refers to the hysteresis value
  • the Ms refers to the source cell measurement value
  • Ofs refers to the source cell frequency offset
  • Ocs refers to the source cell offset
  • Off refers to the offset value.
  • An example situation of the second cell handover is as follows:
  • the measurement configuration message may include a measurement event identifier A2, and a measurement event corresponding to the measurement event identifier A2 is: when the quality of the source cell is less than or equal to a preset threshold, a measurement report message is reported.
  • the terminal to be switched can parse out the measurement event identifier A2 included in the measurement configuration message, and the terminal to be switched can be based on the corresponding list To query the measurement event corresponding to the measurement event identifier A2.
  • the terminal to be handed over can measure the source cell to obtain the quality of the source cell.
  • the quality of the source cell may refer to a reference signal receiving power (RSRP) of the source cell, and an RSRP unit is dBm.
  • the quality of the source cell may also refer to a reference Signal receiving quality (reference receiving quality, RSRQ), the unit of RSRQ is dB.
  • the description of the parameters for measuring the quality of the source cell in this embodiment is an optional example, and is not specifically limited in this embodiment, as long as the quality of the source cell is greater than the preset threshold, all the The source cell can meet the service continuity of the terminal to be switched. When the quality of the source cell is less than or equal to the preset threshold, the source cell cannot meet the service requirements of the terminal to be switched. Continuity is sufficient.
  • the to-be-switched terminal may report the measurement report message to the source base station, and the measurement report message may include The measurement event A2, after the source base station receives the measurement report message, according to the measurement event A2 included in the measurement report message, it can be determined that the quality of the source cell is less than or equal to a preset For the threshold, the measurement event identifier A4 is sent to the terminal to be switched, and the processing process of the terminal to be switched receives the measurement event identifier A4, please refer to the above for details, and will not be described in detail.
  • the to-be-switched terminal may report to the source base station that includes measurements The event identifier A4 and the measurement report message of the PCI of the destination cell.
  • Step 403 The source base station sends a handover request message to the destination base station.
  • the source base station After the source base station receives the measurement report message, the source base station can perform a handover decision according to the measurement report message to determine whether the terminal to be handed over is handed over to the destination cell.
  • the measurement report message received by the source base station includes the PCI of the destination cell measured by the terminal to be switched, and then the source base station can perform Make a judgment;
  • the source base station can maintain a blacklist, and the blacklist includes at least one cell's PCI, if the source base station determines that the destination cell's PCI is in the blacklist, all the The source base station can determine that the terminal to be switched cannot be switched to the destination cell. If the PCI of the destination cell is not in the blacklist, the source base station can determine that the terminal to be switched can be switched. To the destination cell.
  • This embodiment does not limit the process by which the source base station creates the blacklist, as long as the source base station configures the determined cells that are not able to perform handover in the blacklist, for example, the The source base station determines that the destination cell is in a maintenance state, is in a fault state, etc., and the source base station can configure the PCI of the destination cell in the blacklist.
  • the source base station can determine whether the public land mobile network (PLMN) of the destination cell is the same as the PLMN of the source cell. If the source base station is the same, the source base station can determine the The source cell and the destination cell belong to the same operator, the source base station can determine that the terminal to be handed over can switch to the destination cell, and if they are not the same, the source base station can determine the destination cell. If the source cell and the destination cell do not belong to the same operator, the source base station can determine that the terminal to be switched cannot be switched to the destination cell.
  • PLMN public land mobile network
  • the source base station When the source base station determines that the terminal to be handed over can be handed over to the destination cell, the source base station can configure the handover request message and pass the configured handover request message through The X2 interface is sent to the destination base station.
  • the handover request message shown in this embodiment may include a global cell identifier (CGI) of the destination cell, where the CGI of the destination cell is used to indicate an area covered by the destination cell.
  • CGI global cell identifier
  • the handover request message includes a target frequency resource indication message, and the target frequency resource indication message is used to indicate a target frequency resource to be accessed by the terminal to be handed over.
  • the process of how the source base station determines the target frequency resource is exemplarily described below;
  • the first thing to be clear is that before the source base station determines the target frequency resource, the source base station can obtain the resource configuration of the neighboring cell in advance.
  • the resource configuration includes, but is not limited to, the phase of the source base station. Frequency bands supported by neighboring cells and frequency points corresponding to each frequency point.
  • the first way is that when the source base station determines that the terminal to be handed over needs to access the destination cell, the source base station may obtain at least one primary frequency band and at least one supported by the destination cell.
  • a secondary frequency band if the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target primary frequency band, wherein the target primary frequency band is in at least one primary frequency band supported by the target base station.
  • the handover request message includes the target frequency resource indication message, and the target frequency resource indicated by the target frequency resource indication message is the target main frequency band.
  • the frequency points supported by the terminal to be switched are frequency point 1, frequency point 2, and frequency point 3.
  • the source base station determines that the frequency point 2 supported by the terminal to be switched is located in the target main frequency band.
  • the target frequency resource indicated by the target frequency resource indication message is the target main frequency band where the frequency point 2 is located.
  • the source base station may determine that the target main frequency band corresponds to The target main frequency point, the source base station may determine that the target main frequency point is the target frequency resource, and then the target frequency resource indicated by the target frequency resource indication message is the target main frequency point .
  • the third way is that if the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target slave frequency band, wherein the target slave frequency band is at least one slave frequency supported by the target base station.
  • the handover request message includes the target frequency resource indication message, and the target frequency resource indicated by the target frequency resource indication message is the target slave frequency band.
  • the frequency points supported by the terminal to be switched are frequency point 1, frequency point 2, and frequency point 3, and the source base station determines the frequency at which the frequency point 3 supported by the terminal to be switched is located in the target slave frequency band.
  • the target frequency resource indicated by the target frequency resource indication message is the target slave frequency band where the frequency point 3 is located.
  • a fourth manner is that when the source base station determines that the frequency point supported by the terminal to be switched is within the frequency range of the target slave frequency band, the source base station may determine that the target slave frequency band corresponds to The target slave frequency point, the source base station may determine that the target slave frequency point is the target frequency resource, and then the target frequency resource indicated by the target frequency resource indication message is the target slave frequency point .
  • a fifth method is that if the source base station determines that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band at the same time, the The target frequency resource indicated by the target frequency resource indication message is the main frequency band.
  • a sixth method is that the source base station obtains a first transmission bandwidth, where the first transmission bandwidth is when carrier aggregation (CA) is created between a terminal to be switched and a main frequency band of the destination base station, The transmission bandwidth before the terminal to be switched and the destination base station, the source base station obtains a second transmission bandwidth, where the second transmission bandwidth is when a CA is created between the terminal to be switched and the main frequency band of the destination base station, The transmission bandwidth before the terminal to be switched and the destination base station.
  • CA carrier aggregation
  • the source base station determines that the first transmission bandwidth is greater than the second transmission bandwidth, the source base station determines that the target frequency resource is a main frequency band of the destination base station, and if the source base station determines If the first transmission bandwidth is smaller than the second transmission bandwidth, the source base station determines that the target frequency resource is a slave frequency band of the destination base station.
  • the source base station creates a priority list, where the priority list includes multiple frequency bands of the destination base station, and the multiple frequency bands are The transmission bandwidth when the CA is created between the terminal to be switched and any one of the multiple frequency bands is sorted in descending order.
  • the source base station can determine that the frequency band with the highest priority in the priority list is The target frequency resource.
  • a seventh case is that the source base station may determine that the target frequency resource is a frequency point corresponding to a frequency band with the highest priority in the priority list.
  • the number of destination cells determined by the source base station may be one or more. If the number of destination cells determined by the source base station is multiple, the source base station may perform the handover.
  • the request message is sent to a destination base station serving any of the determined cells for the destination cell.
  • this embodiment uses the source base station as an example to send the target frequency resource indication message to the destination base station through the handover request message as an example for illustration.
  • the source base station may also send the target frequency resource indication message to the destination base station through another message.
  • the source base station may also send the target frequency resource indication message to the destination base station separately.
  • Step 404 The destination base station sends a handover request response message to the source base station.
  • the destination base station may send the handover request response message (Handover Request Acknowledge) to the source base station, where the handover request response message is used to indicate the handover request response message.
  • the destination base station has successfully received the handover request message.
  • the handover request response message shown in this embodiment further includes an instruction message, which is used to instruct the destination base station to allow the terminal to be handed over to access the target frequency resource.
  • the destination base station when the destination base station receives the handover request message, the destination base station may reserve resources for the terminal to be handed over, so that when the terminal to be handed over is handed over to the destination cell , Access can be performed through resources reserved by the destination base station, which effectively improves the success rate of the terminal to be handed over to access the destination cell.
  • the destination base station can identify all destinations to be accessed by the terminal to be handed over according to the target frequency resource indication message. For the target frequency resource, the target base station can reserve resources for the terminal to be switched at the target frequency resource.
  • the target base station can determine that the terminal to be switched is To the main frequency point corresponding to the main frequency band of the destination base station.
  • the target base station can determine that the terminal to be switched to the target base station through random access.
  • the slave frequency point corresponding to the slave frequency band of the destination base station is described.
  • the frequency bands supported by the terminal to be switched are band4, band12, and band17
  • the frequency band supported by the source cell is band4
  • the destination cell is MFBI cell
  • the primary frequency band of the destination cell is band17
  • the slave frequency band is band12.
  • the target frequency resource corresponds to
  • the target base station can determine whether the terminal to be switched randomly accesses the primary frequency band or the secondary frequency band according to the target frequency resource.
  • the target base station may determine that the frequency band to be accessed by the terminal to be switched is the main frequency band of the target base station. If the target base station determines the target frequency resource Belonging to band12, the destination base station may determine that the frequency band to be accessed by the terminal to be switched is the slave frequency band of the destination base station, Wherein, the target base station determines that the target frequency resource corresponds to band 12 to be switched by the terminal to be switched, and then the target base station can determine that the frequency band to be accessed by the terminal to be switched is the slave frequency band.
  • an instruction message may be configured, and the instruction message is used to instruct the target base station to be the target frequency resource on the target frequency resource.
  • the terminal makes a resource reservation, and then the destination base station may send the handover request response message carrying the indication message to the source base station, so that the source base station determines the destination according to the indication message.
  • the base station has made a resource reservation for the terminal to be switched.
  • Step 405 The source base station sends a handover reconfiguration message to the terminal to be handed over.
  • the source base station shown in this embodiment receives the handover request response message, it can be determined that the destination base station has determined that the terminal to be handed over needs to be handed over to the destination served by the destination base station.
  • the source base station is that the terminal to be handed over can successfully handover to the destination cell, and the source base station sends a handover reconfiguration message (RRC Connection Reconfiguration) to the terminal to be handed over.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • the handover reconfiguration message may also include the PCI of the destination cell, and the terminal to be handed over can access the target cell based on the handover reconfiguration message.
  • the handover reconfiguration message shown in this embodiment further includes the indication message and the target frequency resource indication message.
  • the terminal to be handed over can determine the target frequency resource according to the handover reconfiguration message.
  • the terminal to be switched can access the resources reserved by the destination cell for access.
  • Step 406 The source base station sends a sequence number status change message to the destination base station.
  • the source base station can send a serial number status change message (SN StatusTransfer) to the destination base station, where the serial number status changes
  • the message transmits the status of the uplink and downlink packet data convergence protocol (PDCP) to the destination base station, so that the destination base station obtains the source base station and the terminal to be switched according to the sequence number status change message.
  • PDCP packet data convergence protocol
  • the destination base station can synchronize data transmission between the to-be-switched terminal and the source base station according to the sequence number status change message, thereby reducing transmission delay.
  • Step 407 The to-be-switched terminal sends a reconfiguration completion message to the target base station.
  • the to-be-switched terminal can randomly access the destination cell.
  • the to-be-switched terminal can use a non-competitive random access procedure to access the destination cell. .
  • the to-be-switched terminal accesses the destination cell using a competitive random access procedure.
  • the terminal to be switched may send a handover reconfiguration completion message (RRC Connection Reconfiguration Complete) to the destination base station, where the handover reconfiguration completion message is used for Confirm with the destination base station that the handover to the destination cell is complete.
  • RRC Connection Reconfiguration Complete a handover reconfiguration completion message
  • Step 408 The destination base station sends a handover path change message to the core network device.
  • the destination base station after the destination base station receives the reconfiguration completion message, the destination base station sends a path change message (Path Switch Request) to the core network device, where the handover path change message It is used to notify the core network device that the base station accessed by the terminal to be switched is changed from the source base station to the destination base station.
  • a path change message Path Switch Request
  • the core network device After the core network device receives the handover path change message, the core network device no longer sends user plane data of the terminal to be handed over to the source base station, but switches the data transmission path to the destination base station side, That is, before the handover terminal is handed over to the destination cell, the core network device creates a data transmission path between the source base station and the handover terminal, and after the handover terminal is handed over to the destination cell, all The core network device creates the data transmission path between the destination base station and the terminal to be switched.
  • Step 409 The core network device sends a handover path change response message to the target base station.
  • the core network device After the core network device receives the handover path change message, the core network device can send a handover path change response message (Path, Switch, Request, and Acknowledge) to the destination base station.
  • a handover path change response message (Path, Switch, Request, and Acknowledge)
  • Step 410 The destination base station sends a context release message of the terminal to be switched to the source base station.
  • the destination base station can determine that the core network device has created the destination base station and all destination devices.
  • the data transmission path between the terminals to be switched indicates that the terminal to be switched is successfully switched to the destination cell.
  • the destination base station may send a context release message to the source base station.
  • Step 411 The source base station receives a context release message.
  • the source base station can release the context corresponding to the terminal to be switched according to the context release message.
  • the source base station can send a handover request message carrying a target frequency resource indication message to the destination base station, and the destination base station can determine the target base station according to the target frequency resource indication message.
  • the target frequency resource to be accessed by the to-be-switched terminal can identify the target frequency resource to be accessed by the to-be-switched terminal.
  • the to-be-switched terminal may Direct access to the target frequency resource improves the accuracy of the terminal to be switched in accessing the destination cell, effectively avoids the possibility of the terminal to be switched to access the wrong frequency resource, and improves the success rate of cell switching. Moreover, the delay of cell handover is reduced.
  • the cell switching method shown in FIG. 5 is exemplarily described.
  • the scenario in which the cell switching method shown in this embodiment is applied is that a base station serving the source cell and a base station serving the destination cell belong to Different base stations, that is, as shown in FIG. 1, the base station serving the source cell is the source base station, and the source base station and the destination base station do not have an X2 interface, or the source base station and the base station The X2 interface between the destination base stations is unavailable.
  • an S1 interface is configured between the MME and the source base station and between the MME and the destination base station, so that the source base station and Information is exchanged between the MME, the destination base station, and the MME through an S1 interface.
  • Step 501 The source base station sends a measurement configuration message to the terminal to be switched.
  • Step 502 The to-be-switched terminal sends a measurement report message to the source base station.
  • step 401 to step 402 shown in FIG. 4 For the specific execution process of steps 501 to 502 shown in this embodiment, please refer to step 401 to step 402 shown in FIG. 4 for details. The specific execution process is not described in this embodiment.
  • Step 503 The source base station sends a handover instruction message to the MME.
  • the source base station After the source base station receives the measurement report message, the source base station can perform a handover decision according to the measurement report message to determine whether the terminal to be handed over is handed over to the destination cell.
  • the source base station may send the handover instruction message through the MME through the S1 interface.
  • the handover instruction message shown in this embodiment includes The CGI of the target cell and the target frequency resource indication message, and a detailed description of the target frequency resource indication message are shown in the embodiment shown in FIG. 3, and details are not described in this embodiment.
  • the MME determines whether the handover instruction message is legal. If the MME determines that the handover instruction message is legal, it triggers A process in which the MME sends a handover request message to the destination base station.
  • the MME shown in this embodiment determines whether the fields of the handover instruction message meet the preset requirements. If the MME determines that the fields included in the handover instruction message meet the preset requirements, the MME The MME can successfully identify the CGI of the destination cell and the target frequency resource indication message included in the request indication message.
  • the MME After the MME determines that the handover instruction message meets the preset requirement, the MME can determine that the handover instruction message is valid.
  • Step 504 The MME sends a handover request message to the target base station.
  • the MME may configure the handover request message, where the handover request message includes a CGI for indicating the destination cell to the destination base station and includes Target frequency resource indication message.
  • the MME sends the handover request message to the destination base station through an S1 interface, and the handover request message includes the target frequency resource indication message so that the destination base station can perform the handover request message according to the handover request message. Acquiring the target frequency resource to be accessed by the terminal to be switched.
  • Step 505 The destination base station sends a handover request response message to the MME.
  • the destination base station may send the handover request response message to the MME through the S1 interface.
  • step 404 shown in FIG. 4 For a detailed description of the handover request response message, please refer to step 404 shown in FIG. 4, which will not be described in detail in this embodiment, as long as the handover request response message shown in this embodiment includes the indication message. Just fine.
  • the destination base station may reserve resources for the terminal to be handed over.
  • the specific description of the process of resource reservation by the destination base station to the terminal to be handed over is shown in FIG. 3. The illustrated embodiment is not described in detail in this embodiment.
  • Step 506 The MME sends a handover command message to the source base station.
  • the MME shown in this embodiment sends the handover command message (Handover Command) to the base station to indicate to the source base station that the terminal to be handed over can access the destination cell.
  • Handover Command handover command message
  • Step 507 The source base station sends a handover reconfiguration message to the terminal to be handed over.
  • step 507 For the specific execution process of step 507 shown in this embodiment, please refer to step 306 shown in FIG. 3 for details. The specific execution process is not described in this embodiment.
  • Step 508 The source base station sends a base station status change message to the MME.
  • the source base station can send a base station status change message (eNodeB StatusTransfer) to the MME, and the MME according to the base station status change message That is, it is determined that the cell accessed by the terminal to be switched is changed from the source cell to the destination cell, so that the MME creates a data transmission path between the destination base station and the terminal to be switched.
  • eNodeB StatusTransfer base station status change message
  • the MME can obtain data transmission conditions between the source base station and the terminal to be switched, and is configured to instruct the source base station and all An MME status change message (MME Status Transfer) describing the data transmission between the terminals to be switched.
  • MME Status Transfer An MME status change message
  • Step 509 The MME sends an MME status change message to the target base station.
  • the MME may send the configured MME state change message to the destination base station, and the destination base station may obtain the information between the source base station and the terminal to be switched according to the MME state change message.
  • the destination base station can synchronize data transmission between the to-be-switched terminal and the source base station according to the MME state change message, thereby reducing transmission delay.
  • Step 510 The to-be-switched terminal sends a reconfiguration completion message to the target base station.
  • step 510 For a specific execution process of step 510 shown in this embodiment, please refer to step 407 shown in FIG. 4 for details, and details are not described in this embodiment.
  • Step 511 The destination base station sends a handover completion notification message to the MME.
  • the destination base station may send a handover to the MME.
  • a completion notification message (Handover Notify), where the handover completion notification message is used to notify the MME that the terminal to be handed over has successfully accessed the destination cell.
  • Step 512 The MME sends a context release message of the terminal to be switched to the source base station.
  • the MME may send a context release message to the source base station.
  • Step 513 The source base station receives a context release message.
  • the source base station can release the context corresponding to the terminal to be switched according to the context release message.
  • the source base station can send the target frequency resource indication message to the destination base station through the MME, and the destination base station can determine the desired frequency of the terminal to be switched according to the target frequency resource indication message. It can be seen that the target frequency resource accessed by the target base station improves the accuracy of the target cell to access the target cell by identifying the target frequency resource to be accessed by the terminal to be switched, and effectively avoids the terminal to be switched. The possibility of accessing the wrong frequency resource improves the success rate of cell switching and reduces the delay of cell switching.
  • FIG. 6 specifically describes the specific structure of the source base station provided by the present application from the perspective of a functional module as shown in FIG. 6.
  • FIG. 3 For a specific description of the source base station shown in this embodiment, see FIG. 1 and FIG. 2.
  • the source base station includes:
  • a determining unit 601 is configured to determine a target frequency resource, where the target frequency resource is a frequency resource to be switched by a terminal to be switched that requests to switch from a source cell to a destination cell, and the source base station is configured to serve the source cell.
  • the destination cell is served by the destination base station;
  • the determining unit 601 specifically includes:
  • a first determining module 6011 configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • a first determining module 6012 is configured to determine that the target frequency resource is the target main frequency band or the target main frequency point if it is determined that the frequency point supported by the terminal to be switched is within the frequency range of the target main frequency band.
  • the target main frequency band is one of the at least one main frequency band supported by the target cell, and the target main frequency point is a frequency point corresponding to the target main frequency band.
  • the determining unit 601 specifically includes:
  • a second determining module 6013 configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • a second determining module 6014 is configured to determine that the frequency point supported by the terminal to be switched is within a frequency range of a target secondary frequency band, and then determine that the target frequency resource is the target secondary frequency band or the target secondary frequency point.
  • the target slave frequency band is one of the at least one slave frequency band supported by the target cell, and the target slave frequency point is a frequency point corresponding to the target slave frequency band.
  • the determining unit 601 specifically includes:
  • a third determining module 6015 configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • a third determining module 6016 is configured to determine that the target frequency resource is the target master frequency band or the target if it is determined that the frequency points supported by the terminal to be switched are located in the frequency range of the target master frequency band and the target slave frequency band simultaneously.
  • a main frequency point, the target main frequency band is one of the at least one main frequency band supported by the target cell
  • the target slave frequency band is a frequency in the at least one slave frequency band supported by the target cell
  • the target master frequency point is a frequency point corresponding to the target master frequency point.
  • the determining unit 601 specifically includes:
  • a fourth determining module 6017 configured to determine at least one primary frequency band and at least one secondary frequency band supported by the destination cell;
  • a creating module 6018 is configured to create a priority list, where the priority list includes multiple frequency bands supported by the destination base station, and the multiple frequency bands are in accordance with any one of the terminal to be switched and the multiple frequency bands.
  • the carrier aggregation CA is created between the frequency bands, the transmission bandwidth is sorted in descending order;
  • a fifth determining module 6019 is configured to determine that the target frequency resource is a frequency band having the highest priority in the priority list, or the target frequency resource is a frequency band corresponding to the highest priority in the priority list. Frequency.
  • a first sending unit 602 configured to send a target frequency resource indication message to the target base station, where the target frequency resource indication message is used to indicate the target frequency resource;
  • the first sending unit 602 specifically includes:
  • a configuration module 6021 is configured to configure a handover request message, where the handover request message is used to instruct the terminal to be handed over to switch to the destination cell, and the handover request message includes the target frequency resource indication message;
  • a sending module 6022 is configured to send the handover request message to the destination base station through an X2 interface.
  • the first sending unit 602 is further configured to send a handover instruction message to a mobile management entity MME through an S1 interface, where the handover instruction message includes the target frequency resource instruction message, so that the MME passes the S1 interface Sending a handover request message to the destination base station, where the handover request message includes the target frequency resource indication message.
  • the first sending unit 602 is further configured to send a handover instruction message to a mobile management entity MME through an S1 interface, where the handover instruction message includes the target frequency resource instruction message, so that the MME passes the S1 interface Sending a handover request message to the destination base station, where the handover request message includes the target frequency resource indication message.
  • the receiving unit 603 is configured to receive an instruction message sent by the destination base station, where the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the receiving unit 603 is further configured to receive a handover request response message sent by the destination base station through an X2 interface, where the handover request response message is used to indicate that the destination base station has successfully received the handover request message.
  • the handover request message includes the target frequency resource indication message and the indication message;
  • the receiving unit 603 is further configured to receive a handover request response message sent by the MME through an S1 interface, where the handover request response message includes a target frequency resource indication message and the indication message;
  • a second sending unit 604 configured to send the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to the target frequency of the destination cell according to the target frequency resource indication message Resources.
  • a third sending unit 605, configured to send the target frequency resource indication message to the terminal to be switched, so that the terminal to be switched to switch to the target frequency of the destination cell according to the target frequency resource indication message Resources.
  • FIG. 7 The specific structure of the target base station provided in the present application is described below from the perspective of a functional module with reference to FIG. 7, where specific descriptions of the target base station shown in this embodiment are shown in FIG. 1 and FIG. 2 , And the method for performing the cell handover by the destination base station shown in this embodiment, and the specific execution process of the method for performing the cell handover, please refer to FIG. 3 to FIG. 5 for details:
  • the destination base station includes:
  • the receiving unit 701 is configured to receive a target frequency resource indication message sent by a source base station, where the target frequency resource indication message is used to indicate a target frequency resource that is required by a to-be-switched terminal requesting a handover from a source cell to a destination cell.
  • Handover frequency resources the source base station is used to serve the source cell, and the destination base station is used to serve the destination cell;
  • the receiving unit 701 is further configured to receive a handover request message through an X2 interface, the handover request message is used to instruct the terminal to be handed over to switch to the destination cell, and the handover request message includes the Target frequency resource indication message.
  • the receiving unit 701 is further configured to receive, through an S1 interface, a handover request message sent by a mobile management entity MME, where the handover request message includes the target frequency resource indication message.
  • the sending unit 702 is configured to send an instruction message to the source base station, where the instruction message is used to indicate that the terminal to be switched is allowed to switch to the target frequency resource.
  • the sending unit 702 is further configured to send a handover request response message to the source base station through an X2 interface, where the handover request response message is used to indicate that the destination base station has successfully received the handover request message.
  • the handover request message includes the target frequency resource indication message and the indication message.
  • the sending unit 702 is further configured to send a handover request response message to the MME through the S1 interface, so that the MME sends the handover request response message to the source base station through the S1 interface, and the handover
  • the request response message includes a target frequency resource indication message and the indication message.
  • the base station shown in this embodiment may be a source base station shown in the foregoing embodiment or a destination base station shown in the foregoing embodiment.
  • the base station is configured to perform the cell handover method shown in the foregoing embodiment.
  • For a specific implementation process refer to the foregoing embodiment for details, and details are not described in this embodiment.
  • the base station 800 includes at least one processor 801, a communication bus 802, a memory 803, and at least one communication interface 804.
  • the processor 801 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of the solution of the present invention. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication bus 802 may include a path for transmitting information between the aforementioned components.
  • the communication interface 804 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 803 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions Dynamic storage device, can also be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory (EEPROM)), read-only compact disc (compact disc-read-only memory (CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory may exist independently and be connected to the processor through a bus. The memory can also be integrated with the processor.
  • the memory 803 is configured to store application program code that executes the solution of the present invention, and is controlled and executed by the processor 801.
  • the processor 801 is configured to execute a logic function implemented by application code stored in the memory 803, so as to implement the cell handover method shown in the foregoing embodiment.
  • the processor 801 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 8.
  • the base station 800 may include multiple processors, such as the processor 801 and the processor 808 in FIG. 8. Each of these processors can be a single-CPU processor or a multi-CPU processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the present application also includes a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, and the instructions, when executed by a source base station or a destination base station, can be implemented as in the foregoing embodiments.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present invention essentially or part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

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Abstract

本发明提供了一种小区切换方法以及相关设备,所述方法包括源基站确定目标频率资源,所述源基站向所述目的基站发送目标频率资源指示消息,所述源基站接收所述目的基站发送的指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。可见,在源基站确定出驻留在源小区中的待切换终端所要切换接入的目标频率资源的情况下,所述源基站即可向所述目的基站发送目标频率资源指示消息,则在待切换终端发起目的小区接入时,所述待切换终端可直接切换至所述目标频率资源,提升了终端接入所述目的小区的准确性,有效的避免终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。

Description

一种小区切换方法以及相关设备 技术领域
本申请实施例涉及通信技术领域,尤其涉及的是一种小区切换方法以及相关设备。
背景技术
在第三代合作伙伴计划(3rd generation partnership project,3GPP)协议中通用移动通信系统(universal mobile telecommunications system,UMTS)陆地无线接入网(umts terrestrial radio access network,E-Utran)中定义了各频段和频率的对应关系,基于频段和频率的对应关系,3GPP协议提出了多频段(multi-frequency band indicator,MFBI)小区。
MFBI小区中,可同时支持两个频段,一个主频段,另一个为从频段,而MFBI小区的工作频率处于主频段和从频段的交叠区,而支持MFBI的终端在切换至MFBI小区的过程中,现有技术所示的方案中,会出现切换错误频点的情况。例如,终端所支持的频段位于所述MFBI小区的主频段,但是MFBI小区将所述终端切换至MFBI小区的从频段上,或,终端所支持的频段位于所述MFBI小区的从频段,但是MFBI小区将所述终端切换至MFBI小区的主频段上。
可见,采用现有技术所示的MFBI小区的切换过程,会导致出现切换错误频点的情况,导致MFBI小区的切换准确性差,增加了切换时延。
发明内容
本发明实施例提供了一种能够提高小区切换准确性的小区切换方法以及相关设备。
本发明实施例第一方面提供了一种小区切换的方法,包括:
步骤A、源基站确定目标频率资源。
具体的,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务;
步骤B、所述源基站向所述目的基站发送目标频率资源指示消息。
所述目标频率资源指示消息用于指示所述目标频率资源。
步骤C、所述源基站接收所述目的基站发送的指示消息。
所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
采用本实施例所示的方法,源基站可将目标频率资源指示消息发送给目的基站,所述目的基站即可根据所述目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,可见,所述目的基站通过识别出所述待切换终端所要接入的目标频率资源,在待切换终端发起目的小区接入时,所述待切换终端可直接接入至所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤A具体包括:
步骤A11、所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频 段;
步骤A12、所述源基站判断所述待切换终端所支持的频点位于目标主频段的频率范围内,若是,则执行步骤A13;
步骤A13、所述源基站确定所述目标频率资源为所述目标主频段或目标主频点。
具体的,若所述源基站判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
采用本方面所示,所述源基站在确定出所述待切换终端所支持的频点位于目标主频段的频率范围内的情况下,所述源基站可直接确定出所述目标频率资源为所述目标主频段或所述目标主频点,从而根据待切换终端所支持的频点确定出在小区切换时所述待切换终端所接入的所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤A具体包括:
步骤A21、所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
步骤A22、所述源基站判断所述待切换终端所支持的频点是否位于目标从频段的频率范围内,若是,则执行步骤A23。
步骤A23、所述源基站确定所述目标频率资源为所述目标从频段或目标从频点。
具体的,若所述源基站判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
采用本方面所示,所述源基站在确定出所述待切换终端所支持的频点位于目标从频段的频率范围内的情况下,所述源基站可直接确定出所述目标频率资源为目标从频段或目标从频点,从而根据待切换终端所支持的频点确定出在小区切换时所述待切换终端所接入的所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤A具体包括:
步骤A31、所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
步骤A32、所述源基站判断所述待切换终端所支持的频点是否同时位于目标主频段和目标从频段的频率范围内,若是,则执行步骤A33。
步骤A33、所述源基站确定所述目标频率资源为所述目标主频段或目标主频点。
具体的,若所述源基站判断出所述待切换终端所支持的频点同时位于目标主频段和目 标从频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与所述目标主频段对应的频点。
采用本方面所示,所述源基站在确定出所述待切换终端所支持的频点同时位于目标主频段和目标从频段的频率范围内,则所述源基站可直接确定出所述目标频率资源为所述目标主频段或目标主频点,从而根据待切换终端所支持的频点确定出在小区切换时所述待切换终端所接入的所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤A具体包括:
步骤A41、所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
步骤A42、所述源基站创建优先级列表.
具体的,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
步骤A43、所述源基站确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
采用本方面所示,所述源基站可创建所述优先级列表,从而使得所述源基站可确定出所述待切换终端所要接入的目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点,则在保障了数据传输的速度的同时,还提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤B具体包括:
步骤B11、所述源基站配置切换请求消息。
具体的,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息;
步骤B12、所述源基站通过X2接口向所述目的基站发送所述切换请求消息。
采用本方面所示,所述源基站在确定出所述目标频率资源的情况下,所述源基站即可将切换请求消息发送给所述目的基站,且所述切换请求消息中携带有所述目标频率资源指示信息,以使所述目的基站能够根据所述切换请求消息准确的确定出所述待切换终端所要接入的目标频率资源,进而提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤C具体包括:
步骤C11、所述源基站通过X2接口接收所述目的基站发送的切换请求响应消息;
具体的,在所述源基站和所述目的基站之间配置有X2接口的情况下,所述源基站即可通过X2接口接收所述目的基站发送的切换请求响应消息,其中,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息;
本方面所示的方法还包括步骤D、所述源基站将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
在所述源基站确定出所述待切换终端可接入所述目标频率资源上时,所述源基站即可向所述待切换终端发送所述目标频率资源指示消息。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤B具体包括:
步骤B21、所述源基站通过S1接口向移动管理实体MME发送切换指示消息。
在所述源基站和所述目的基站之间没有配置X2接口的情况下,则所述源基站即可向所述MME发送切换指示消息,其中,所述切换指示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第一方面,本发明实施例第一方面的一种可选的实现方式中,所述步骤C具体包括:
步骤C21、所述源基站通过S1接口接收所述MME发送的切换请求响应消息;
所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息;
本方面所示的方法还包括步骤E、所述源基站将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
本发明实施例第二方面提供了一种小区切换的方法,包括:
步骤A、目的基站接收源基站发送的目标频率资源指示消息。
所述目标频率资源指示消息用于指示目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的基站用于为所述目的小区进行服务;
步骤B、所述目的基站向所述源基站发送指示消息。
所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
采用本实施例所示的方法,目标基站可根据源基站发送的目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,则所述目的基站即可根据所述目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,可见,所述目的基站通过识别出所述待切换终端所要接入的目标频率资源,在待切换终端发起目的小区接入时,所述待切换终端可直接接入至所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且 降低了小区切换的时延。
基于本发明实施例第二方面,本发明实施例第二方面的一种可选的实现方式中,所述步骤B还包括:所述目的基站通过X2接口接收切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第二方面,本发明实施例第二方面的一种可选的实现方式中,所述步骤B还包括:所述目的基站通过X2接口向所述源基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息。
基于本发明实施例第二方面,本发明实施例第二方面的一种可选的实现方式中,所述步骤A还包括:所述目的基站通过S1接口接收移动管理实体MME发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第二方面,本发明实施例第二方面的一种可选的实现方式中,所述步骤B还包括所述目的基站通过S1接口向所述MME发送切换请求响应消息,以使所述MME通过S1接口向所述源基站发送所述切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息。
本发明实施例第三方面提供了一种源基站,包括:
确定单元,用于确定目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务;
第一发送单元,用于向所述目的基站发送目标频率资源指示消息,所述目标频率资源指示消息用于指示所述目标频率资源;
接收单元,用于接收所述目的基站发送的指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
本方面所示的源基站用于执行本发明实施例第一方面所示的方法,具体执行过程以及有益效果的说明,请详见本发明实施例第一方面所示。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述确定单元包括:
第一确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
第一判断模块,用于若判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述确定单元包括:
第二确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频 段;
第二判断模块,用于若判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述确定单元包括:
第三确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
第三判断模块,用于若判断出所述待切换终端所支持的频点同时位于目标主频段和目标从频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与所述目标主频段对应的频点。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述确定单元包括:
第四确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
创建模块,用于创建优先级列表,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
第五确定模块,用于确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述第一发送单元包括:
配置模块,用于配置切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息;
发送模块,用于通过X2接口向所述目的基站发送所述切换请求消息。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述接收单元还用于,通过X2接口接收所述目的基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息;
所述源基站还包括:
第二发送单元,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述第一发送单元还用于,通过S1接口向移动管理实体MME发送切换指示消息,所述切换指 示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第三方面所示,本发明实施例第三方面一种可选的实现方式中,所述接收单元还用于,通过S1接口接收所述MME发送的切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息;
所述源基站还包括:
第三发送单元,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
本发明实施例第四方面提供了一种目的基站,包括:
接收单元,用于接收源基站发送的目标频率资源指示消息,所述目标频率资源指示消息用于指示目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的基站用于为所述目的小区进行服务;
发送单元,用于向所述源基站发送指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
本方面所示的目的基站用于执行本发明实施例第二方面所示的方法,具体执行过程以及有益效果的说明,请详见本发明实施例第二方面所示,具体不做赘述。
基于本发明实施例第四方面,本发明实施例第四方面一种可选的实现方式中,所述接收单元还用于,通过X2接口接收切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第四方面,本发明实施例第四方面一种可选的实现方式中,所述发送单元还用于,通过X2接口向所述源基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息。
基于本发明实施例第四方面,本发明实施例第四方面一种可选的实现方式中,所述接收单元还用于,通过S1接口接收移动管理实体MME发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
基于本发明实施例第四方面,本发明实施例第四方面一种可选的实现方式中,所述发送单元还用于,通过S1接口向所述MME发送切换请求响应消息,以使所述MME通过S1接口向所述源基站发送所述切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息。
本发明实施例第五方面提供了一种基站,其特征在于,包括处理器和存储器,其中,
所述存储器中存有计算机可读程序;
所述处理器通过运行所述存储器中的程序,在所述基站作为所述源基站时,所述基站用于执行本发明实施例第一方面所示的方法,在所述基站作为目的基站时,所述基站用于执行本发明实施例第二方面所示的方法。
本发明实施例第六方面提供了一种存储一个或多个程序的计算机可读存储介质,所述 一个或多个程序包括指令,所述指令当被源基站执行时使所述源基站执行如本发明实施例第一方面所示的方法,以及所述指令当被目的基站执行时使所述目的基站执行如本发明实施例第二方面所示的方法。
采用本实施例所示的小区切换的方法,在源基站确定出驻留在源小区中的待切换终端所要切换接入的目标频率资源的情况下,所述源基站即可向所述目的基站发送用于指示所述目标频率资源的目标频率资源指示消息,则在待切换终端发起目的小区接入时,所述待切换终端可直接切换至所述目标频率资源,提升了终端接入所述目的小区的准确性,有效的避免终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。
附图说明
图1为本发明所提供的通信系统的一种实施例结构示意图;
图2为本发明所提供的一种实施例小区示意图;
图3为本发明所提供的小区切换方法的一种实施例步骤流程图;
图4为本发明所提供的小区切换方法的另一种实施例步骤流程图;
图5为本发明所提供的小区切换方法的另一种实施例步骤流程图;
图6为本发明所提供的源基站的一种实施例结构示意图;
图7为本发明所提供的目的基站的一种实施例结构示意图;
图8为本发明所提供的基站的一种实施例结构示意图。
具体实施方式
下面具体实施方式和附图足以说明使得本领域技术人员能够对其进行实施的具体实施例。其他实施例可以包括结构、逻辑、电学、过程和其他改变。一些实施例的部分和特征可被包括在或者代替其他实施例的部分和特征。
为更好的理解本申请所提供的小区切换的方法,以下结合图1所示首先对本申请所示的小区切换方法所应用的通信系统进行示例性说明,其中,图1为本发明所提供的通信系统的一种实施例结构示意图。
本实施例所示的通信系统可为通用移动通信技术的长期演进(long term evolution,LTE)为例,所述通信系统可包括核心网设备101、源基站102、目的基站103以及终端104,本实施例中,所述通信系统所包括的各设备的具体数量的说明为可选的示例,不做限定。
所述核心网设备101包括移动管理实体(mobility management entity,MME)和用户面处理网关(serving gateway,SGW)。MME属于控制面部分,负责控制面的移动性管理,包括用户上下文和移动状态管理,分配用户临时身份标识等;SGW属于用户面部分,负责空闲状态时为下行数据发起寻呼,管理保存IP承载参数和网络内路由信息等;MME与SGW之间呈网状连接,一个MME可以控制若干个SGW。
所述核心网设备101与源基站102之间,且所述核心网设备101与所述目的基站103之间通过S1接口进行通信,而所述源基站102和所述目的基站103之间通过X2接口进行通信。
应理解,本实施例所示的所述源基站102以及所述目的基站103可以为基站,也可为接入点,用于为所述终端104提供服务,所述源基站102以及所述目的基站103与所述终端104之间采用一个或多个发射天线以及一个或多个接收天线进行信号的传输。
本实施例所示的所述终端104还可称为移动台(mobilestation,MS)或移动终端(mobileterminal)等。其可以经无线接入网(radioaccessnetwork,RAN)与核心网设备101进行通信。且所述终端104可为移动电话(或称为“蜂窝”电话)、平板电脑、个人数字助手和具有移动终端的计算机,还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
本实施例所示的终端104可在通信系统中与所述源基站102中进行无线通信,具体的,本实施例所示的源基站102可以为地理区域中的源小区进行服务,而本实施例所示的目的基站103可以为地理区域中的目的小区进行服务。
以下对本实施例所示的通信系统的应用场景进行示例性说明,本实施例所示的通信系统的应用场景为,所述终端104位于所述源小区内且与所述源基站102处于连接状态,由于终端104在不同的小区间移动时,终端104需要由所述源小区切换至所述目的小区。
本实施例所示的目的小区即为所述终端104进行小区切换的目的小区,在本实施例中,所述目的小区为多频段(multi-frequency band indicator,MFBI)小区,以下对呈MFBI的目的小区进行说明:
本实施例所示的目的小区的工作频率属于多个频段,且所述目的小区的工作频率处于两个频段的交叠区,所述目的小区的示意图以图2所示为例,以所述目的小区200的上行频率为704Mhz至716Mhz之间,且下行频率为734Mhz至746Mhz之间为例,所述目的小区的上行频率以及下行频率既属于频段(Band)12也属于Band17,其中,目的小区200的主频段为Band17,且针对同一个频率,在Band12和Band17中的频点不同,分别为Earfcn1和Earfcn2。
若终端104想要在目的小区200内获取服务,则终端104需要满足如下所示的条件:
所述终端104需要满足的一种条件为,所述终端104具有MFBI功能,且所述终端104的所支持的频段为Band17,其中,具有MFBI功能的所述终端104是指能够接入至MFBI小区的终端。
所述终端104需要满足的另一种条件为,所述终端104具有MFBI功能,且所述终端104所支持的频段为Band12。
为更好的理解本发明实施例所示的小区切换的方法,首先基于图1至图2所示的对本申请所应用的通信系统的结构,对本实施例所示的小区切换的方法的执行过程进行概述性说明:
为实现连接在所述源小区内的所述终端,切换至呈MFBI的目的小区内的目的,现有技术所采用的技术方案中,对所述源小区进行服务的源基站向为所述目的小区的目的基站发送切换请求消息,而目的基站基于切换请求消息仅能够确定出终端所要切换的小区是目的小区,但是目的基站无法识别出终端所要切换的是目的小区的主频段所对应的频点还是目的小区的从频段所对应的频点,导致终端会出现切换错误频点的情况。
而采用本申请所示的小区切换的方法,对所述目的小区进行服务的目的基站能够确定出终端所要切换的是目的小区的主频段还是从频段,从而有效的避免了终端切换错误频段的情况。
以下结合图3所示对本实施例所示的小区切换的方法的一种可选的实施例的具体的执行过程进行详细说明。
步骤301、源基站确定目标频率资源。
具体的,本实施例所示的所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务。
更具体的,本实施例对所述源基站确定所述目标频率资源的具体过程不做限定,只要所述目标频率资源为所述终端请求接入且所属于所述目的小区的频率资源即可;
以下对本实施例所示的所述源基站确定所述目标频率资源的几种可选的方式进行示例性说明:
第一种可选的方式为:
首先,所述源基站可确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
其次,所述源基站可判断驻留在所述源小区内的待切换终端所支持的频点是否位于目标主频段的频率范围内;
若所述源基站判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则所述源基站即可确定所述目标频率资源为所述目标主频段或目标主频点,其中,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
第二种可选的方式为:
首先,所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
其次,所述源基站可判断所述待切换终端所支持的频点是否位于目标从频段的频率范围内;
若所述源基站判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则所述源基站即可确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
第三种可选的方式为:
首先,所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
其次,所述源基站可判断所述待切换终端所支持的频点是否同时位于目标主频段和目标从频段的频率范围内;
若所述源基站判断出所述待切换终端所支持的频点同时位于目标主频段和目标从频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与 所述目标主频段对应的频点。
第四种可选的方式为:
首先,所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
其次,所述源基站创建优先级列表,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
在所述源基站成功创建所述优先级列表的情况下,所述源基站即可确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
步骤302、所述源基站向所述目的基站发送目标频率资源指示消息。
本实施例中,在所述源基站确定出所述目标频率资源的情况下,所述源基站即可配置目标频率资源指示消息,所述目标频率资源指示消息用于指示所述目标频率资源,所述源基站即可将已配置的所述目标频率资源指示消息发送给目的基站,所述目标基站根据所述目标频率资源指示消息即可确定出所述待切换终端所要切换的目标频率资源,对所述目标频率资源的具体说明请详见步骤301所示,具体在本步骤中不做赘述。
步骤303、所述源基站接收所述目的基站发送的指示消息。
在所述目的基站确定出所述待切换终端所要切换的所述目标频率资源的情况下,所述目的基站即可配置指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
具体的,本实施例所示的所述指示消息用于指示所述待切换终端可切换至所述目标频率资源上。
采用本实施例所示的小区切换的方法,源基站可将目标频率资源指示消息发送给目的基站,所述目的基站即可根据所述目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,可见,所述目的基站通过识别出所述待切换终端所要接入的目标频率资源,在待切换终端发起目的小区接入时,所述待切换终端可直接接入至所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。
为更好的理解本发明实施例所示的小区切换的方法,以下结合具体实施例进行示例性说明,以下首先结合图4所示对本实施例所示的小区切换的方法的一种可选的实施例的具体的执行过程进行详细说明。
首先对图4所示的小区切换方法进行示例性说明,本实施例所示的小区切换方法所应用的场景为,为所述源小区进行服务的基站和为所述目的小区进行服务的基站属于不同的基站,即如图1所示,为所述源小区进行服务的基站为所述源基站,而为所述目的小区进行服务的基站为所述目的基站,且所述源基站和所述目的基站之间具有X2接口,即所述源基站和所述目的基站之间配置了X2关系,以使所述源基站和所述目的基站之间具有X2切换的使能。
本实施例所示的所述源基站和所述目的基站之间具有X2切换的使能是指,所述源基站 和所述目的基站之间交换所需的应用层数据,以使得源基站和所述目的基站通过X2接口进行信息的交互。
步骤401、源基站向待切换终端发送测量配置消息。
本实施例中,所述待切换终端为需要切换至所述目的小区的终端,所述待切换终端的具体说明,请参见图1以及图2所示的所述终端,具体在本实施例中不做赘述。
驻留在所述源小区内的待切换终端处于连接态时,为所述源小区服务的源基站可向所述待切换终端发送测量配置消息,本实施例所示的测量配置消息用于指示所述待切换终端按所述测量配置消息的指示对所述待切换终端的通信环境进行测量,并将测量报告消息上报给所述源基站,所述源基站根据所述待切换终端上报的测量报告消息即可确定出所述待切换终端是否需要进行小区切换。
可选的,在所述待切换终端与所述源基站建立了无线承载时,所述源基站下发无线资源控制(radio resource control,RRC)至所述待切换终端,其中可包含所述源基站配置的所述测量配置消息(Measurement Configuration),所述Measurement Configuration用于控制待切换终端连接态的测量过程。
本实施例对所述测量配置消息所指示的具体内容不做限定,只要所述待切换终端能够根据所述测量配置消息进行通信环境的测量以使所述源基站确定出待切换终端是否需要进行小区切换即可,例如,所述源基站可通过所述测量配置消息指示驻留在所述源小区的待切换终端进行测量的测量对象、测量的周期以及测量的条件等。其中,所述测量的条件用于指示所述待切换终端在对测量对象进行测量以生成测量结果,且在所述测量结果满足所述测量条件时,所述待切换终端可向所述源基站上报测量报告消息。
步骤402、待切换终端向源基站发送测量报告消息。
本实施例所示的待切换终端在接收到所述测量配置消息后,所述待切换终端即可根据所述测量配置消息对通信环境进行测量。
具体的,所述测量配置消息可包括用于指示所述待切换终端进行测量的测量事件标识AX,所述待切换终端可预先存储有对应列表,所述对应列表包括不同的测量事件标识AX与不同的测量事件的对应关系,以使所述待切换终端接收到测量事件标识AX的情况下,所述待切换终端即可根据所述对应列表确定出对应的测量事件,则所述待切换终端即可确定出在满足与测量事件标识AX对应的测量事件时,所述待切换终端上报所述测量报告消息。
本实施例所示以小区切换的两种情况为例进行示例性说明:
第一种小区切换的示例情况如下:
所述源基站所配置的所述测量配置消息可包括有测量事件标识A4,与所述测量事件标识A4对应的测量事件为测量相邻小区的质量,若相邻小区的质量大于或等于源小区的质量,则上报测量报告消息。
可见,在所述待切换终端接收到所述测量配置消息后,所述待切换终端即可解析出所述测量配置消息所包含的所述测量事件标识A4,所述待切换终端即可根据所述对应列表,查询出与所述测量事件标识A4对应的测量事件,则所述待切换终端即可根据与所述测量事件标识A4对应的测量事件,即可对相邻小区进行测量,若相邻小区的信号质量大于或等于 源小区的信号质量,则上报所述测量报告消息。
在所述待切换终端确定出相邻小区中,小区信号质量大于或等于所述源小区的信号质量的小区为所述目的小区,所述待切换终端即可向所述源基站上报包括有测量事件标识A4以及所述目的小区的物理小区标识(physical cell identifier,PCI)的测量报告消息。
以下对所述待切换终端确定所述目的小区的信号质量大于或等于所述源小区的信号质量的具体过程进行说明:
所述待切换终端确定出在预设时间段内,所述目的小区的信号质量大于或等于所述源小区的信号质量,所述目的小区的信号质量大于或等于所述源小区的信号质量可指Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off且维持预设时间段。
其中,所述Mn是指所述目的小区测量值,所述Ofn是指所述目的小区频率偏移,所述Ocn是指所述目的小区偏置,所述Hys是指迟滞值;而所述Ms是指所述源小区测量值,所述Ofs是指所述源小区频率偏移,所述Ocs是指所述源小区偏置,所述Off是指偏置值。
第二种小区切换的示例情况如下:
所述测量配置消息可包括有测量事件标识A2,与所述测量事件标识A2对应的测量事件为:在所述源小区的质量小于或等于预设门限时,上报测量报告消息。
可见,在所述待切换终端接收到所述测量配置消息后,待切换终端即可解析出所述测量配置消息所包含的所述测量事件标识A2,所述待切换终端可根据所述对应列表,查询出与所述测量事件标识A2对应的测量事件。
根据与所述测量事件标识A2对应的测量事件,则所述待切换终端即可对所述源小区进行测量以获取所述源小区的质量。
可选的,所述源小区的质量可指所述源小区的参考信号接收功率(reference signal receiving power,RSRP),RSRP单位为dBm;还可选的,所述源小区的质量还可指参考信号接收质量(reference signal receiving quality,RSRQ),RSRQ单位dB。本实施例对衡量所述源小区的质量的参数的说明为可选的示例,具体在本实施例中不做限定,只要所述源小区的质量在大于所述预设门限的情况下,所述源小区能够满足所述待切换终端的业务的连续性,在所述源小区的质量在小于或等于所述预设门限的情况下,所述源小区不能够满足所述待切换终端业务的连续性即可。
若所述待切换终端判断出所述源小区的质量小于或等于所述预设门限,则所述待切换终端可将所述测量报告消息上报给源基站,所述测量报告消息中可包括有所述测量事件A2,则所述源基站接收到所述测量报告消息后,根据所述测量报告消息中所包括的所述测量事件A2即可确定出所述源小区的质量小于或等于预设门限,则将测量事件标识A4发送给待切换终端,待切换终端接收到测量事件标识A4的处理过程,请详见上述所示,具体不做赘述。
在所述待切换终端确定出相邻小区中,小区信号质量大于或等于所述源小区的信号质量的小区为所述目的小区,所述待切换终端即可向所述源基站上报包括有测量事件标识A4以及所述目的小区的PCI的测量报告消息。
步骤403、源基站向目的基站发送切换请求消息。
在所述源基站接收到所述测量报告消息后,所述源基站即可根据所述测量报告消息进行切换判决以判决所述待切换终端是否切换至所述目的小区。
以下说明所述源基站对所述测量报告消息进行判决的过程:
由步骤402所述可知,所述源基站所接收到的所述测量报告消息包括有所述待切换终端所测量到的所述目的小区的PCI,则所述源基站即可对所述目的小区进行判决;
可选的,若所述源基站可维护有黑名单,所述黑名单内包括有至少一个小区的PCI,若所述源基站确定出所述目的小区的PCI位于所述黑名单中,则所述源基站即可判决出所述待切换终端不可切换至所述目的小区,若所述目的小区的PCI不位于所述黑名单中,所述源基站即可判决出所述待切换终端可切换至所述目的小区。
本实施例对所述源基站创建所述黑名单的过程不做限定,只要所述源基站将确定出的不能够进行切换的小区的PCI配置在所述黑名单中即可,例如,所述源基站确定出目的小区处于维修状态,处于故障状态等,所述源基站即可将所述目的小区的PCI配置在所述黑名单中。
又如,所述源基站可判断所述目的小区的公共陆地移动网络(public land mobile network,PLMN)与所述源小区的PLMN是否相同,若相同,则所述源基站即可确定出所述源小区与所述目的小区所属于相同的运营商,则所述源基站即可判决出所述待切换终端可切换至所述目的小区,若不相同,则所述源基站即可确定出所述源小区与所述目的小区不属于相同的运营商,则所述源基站即可判断出所述待切换终端不可切换至所述目的小区。
在所述源基站判决出所述待切换终端可切换至所述目的小区的情况下,则所述源基站即可配置所述切换请求消息(Handover Request),并将已配置的切换请求消息通过X2接口发送给所述目的基站。
以下对所述切换请求消息所包括的具体内容进行示例性说明:
本实施例所示的所述切换请求消息可包括所述目的小区的全球小区识别码(cell global identifier,CGI),其中,所述目的小区的CGI用于指示所述目的小区所覆盖的区域。
本实施例中,所述切换请求消息包括目标频率资源指示消息,所述目标频率资源指示消息用于指示所述待切换终端要接入的目标频率资源。
以下对所述源基站如何确定所述目标频率资源的过程进行示例性说明;
首先需明确的是,在所述源基站确定出所述目标频率资源之前,所述源基站可预先获取相邻小区的资源配置情况,所述资源配置情况包括但不限于所述源基站的相邻小区所支持的频带以及与各频点对应的频点。
第一种方式为,所述源基站在确定出所述待切换终端需要接入至所述目的小区的情况下,则所述源基站可获取所述目的小区所支持的至少一个主频段以及至少一个从频段,若所述源基站判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,其中,所述目标主频段为所述目的基站所支持的至少一个主频段中的一个主频段,则所述切换请求消息包括所述目标频率资源指示消息,且所述目标频率资源指示消息所指示的目标频率资源为所述目标主频段。
例如,所述待切换终端所支持的频点为频点1、频点2以及频点3,所述源基站确定出所述待切换终端所支持的频点2位于所述目标主频带的频率范围内,则所述目标频率资源指示消息所指示的所述目标频率资源为所述频点2所位于的所述目标主频带。
第二种方式为,在所述源基站确定出所述待切换终端所支持的频点位于所述目标主频段的频率范围内的情况下,所述源基站可确定出所述目标主频段对应的目标主频点,则所述源基站可确定出所述目标主频点为所述目标频率资源,则所述目标频率资源指示消息所指示的所述目标频率资源为所述目标主频点。
第三种方式为,若所述源基站判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,其中,所述目标从频段为所述目的基站所支持的至少一个从频段中的一个从频段,则所述切换请求消息包括所述目标频率资源指示消息,且所述目标频率资源指示消息所指示的所述目标频率资源为所述目标从频段。
例如,所述待切换终端所支持的频点为频点1、频点2以及频点3,所述源基站确定出所述待切换终端所支持的频点3位于所述目标从频带的频率范围内,则所述目标频率资源指示消息所指示的所述目标频率资源为所述频点3所位于的所述目标从频带。
第四种方式为,在所述源基站确定出所述待切换终端所支持的频点位于所述目标从频段的频率范围内的情况下,所述源基站可确定出所述目标从频段对应的目标从频点,则所述源基站可确定出所述目标从频点为所述目标频率资源,则所述目标频率资源指示消息所指示的所述目标频率资源为所述目标从频点。
第五种方式为,若所述源基站判断出所述待切换终端所支持的频点同时位于所述目标主频段和所述目标从频段的频率范围内,则所述切换请求消息所包括的所述目标频率资源指示消息所指示的所述目标频率资源为所述主频带。
第六种方式为,所述源基站获取第一传输带宽,所述第一传输带宽为若待切换终端与所述目的基站的主频段之间创建载波聚合(carrier aggregation,CA)时,所述待切换终端与所述目的基站之前的传输带宽,所述源基站获取第二传输带宽,所述第二传输带宽为若待切换终端与所述目的基站的主频段之间创建CA时,所述待切换终端与所述目的基站之前的传输带宽。
若所述源基站确定出所述第一传输带宽大于所述第二传输带宽,则所述源基站确定出所述目标频率资源为所述目的基站的主频段,若所述源基站确定出所述第一传输带宽小于所述第二传输带宽,则所述源基站确定出所述目标频率资源为所述目的基站的从频段。
可选的,若所述目的基站所包括的频段的数量有多个,则所述源基站创建优先级列表,所述优先级列表包括有所述目的基站的多个频段,则多个频段按待切换终端与多个频段中的任一频段之间创建CA时的传输带宽由大到小的顺序进行排序,所述源基站即可确定出所述优先级列表中具有最高优先级的频段为所述目标频率资源。
第七种情况为,所述源基站可确定出所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
本实施例中,所述源基站所确定出目的小区的数量可为一个或多个,若所述源基站确定出所述目的小区的数量为多个,则所述源基站可将所述切换请求消息发送给为一确定出 的任一个为目的小区进行服务的目的基站。
需明确的是,本实施例以所述源基站通过所述切换请求消息将所述目标频率资源指示消息发送给所述目的基站的为例进行示例性说明,在其他实施例中,所述源基站也可通过其他消息将所述目标频率资源指示消息发送给所述目的基站,又如,所述源基站也可单独将所述目标频率资源指示消息发送给所述目的基站。
步骤404、目的基站向源基站发送切换请求响应消息。
所述目的基站接收到所述切换请求消息的情况下,所述目的基站即可向所述源基站发送所述切换请求响应消息(Handover Request Acknowledge),所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息。
本实施例所示的所述切换请求响应消息还包括有指示消息,所述指示消息用于指示所述目的基站允许所述待切换终端接入至所述目标频率资源。
本实施例中,在所述目的基站接收到所述切换请求消息的情况下,所述目的基站可为所述待切换终端进行资源预留,从而使得待切换终端在切换至所述目的小区时,可通过所述目的基站已预留的资源进行接入,有效的提高了待切换终端接入所述目的小区的成功率。
因所述目的基站接收到的所述切换请求消息包括有所述目标频率资源指示消息,则所述目的基站根据所述目标频率资源指示消息即可识别出所述待切换终端所要接入的所述目标频率资源,所述目的基站即可在所述目标频率资源为所述待切换终端进行资源预留。
具体的,若所述待切换终端所要接入的所述目标频率资源为所述目的基站的主频段所对应的主频点,则所述目的基站即可确定出所述待切换终端通过随机接入至所述目的基站的主频段所对应的主频点上。
若所述待切换终端所要接入的所述目标频率资源为所述目的基站的从频段所对应的从频点,则所述目的基站即可确定出所述待切换终端通过随机接入至所述目的基站的从频段所对应的从频点上。
例如,待切换终端所支持的频段为band4,band12和band17,源小区所支持的频段是band4,目的小区为MFBI小区,且所述目的小区的主频段为band17,从频段为band12,当所述待切换终端需要从band4切换至band12时,由于所述切换请求消息中所携带的目标频率资源指示消息中,包括有所述待切换终端所要接入的目标频率资源,所述目标频率资源对应于所述待切换终端所要切换的band12,则所述目的基站即可根据所述目标频率资源确定出所述待切换终端随机接入的是主频段还是从频段,例如,若所述目的基站确定出所述目标频率资源所属于band17,则所述目的基站即可确定出所述待切换终端所要接入的频段为所述目的基站的主频段,若所述目的基站确定出所述目标频率资源所属于band12,则所述目的基站即可确定出所述待切换终端所要接入的频段为所述目的基站的从频段,其中,所述目的基站确定出所述目标频率资源对应于所述待切换终端所要切换的band12,则所述目的基站即可确定出所述待切换终端所要接入的频段为从频段。
在所述目的基站确定出所述待切换终端所要接入的目标频率资源后,即可配置指示消息,所述指示消息用于指示所述目的基站在所述目标频率资源上为所述待切换终端进行资源预留,则所述目的基站即可将携带有所述指示消息的所述切换请求响应消息发送给所述 源基站,以使所述源基站根据所述指示消息确定出所述目的基站已为所述待切换终端进行资源预留。
步骤405、源基站向待切换终端发送切换重配消息。
具体的,本实施例所示的所述源基站接收到所述切换请求响应消息后,即可确定出所述目的基站已确定出待切换终端需要切换至所述目的基站所服务的所述目的小区,则所述源基站为所述待切换终端能够成功的切换至所述目的小区,所述源基站会向所述待切换终端发送切换重配消息(RRC Connection Reconfiguration)。
为保障待切换终端成功接入至所述目的小区,则所述切换重配消息还可包括所述目的小区的PCI,则所述待切换终端即可根据所述切换重配消息,接入至具有所述切换重配消息所指示的PCI的目的小区。
本实施例所示的切换重配消息还包括所述指示消息以及所述目标频率资源指示消息,所述待切换终端即可根据所述切换重配消息确定出所述目标频率资源,则所述待切换终端即可接入至所述目的小区已预留的资源进行接入。
步骤406、源基站向目的基站发送序列号状态变更消息。
具体的,在所述源基站接收到所述切换请求响应消息后,所述源基站即可将序列号状态变更消息(SN Status Transfer)发送给所述目的基站,其中,所述序列号状态变更消息向所述目的基站传送上下行的分组数据汇聚协议(packet data convergence protocol,PDCP)的状态,从而使得所述目的基站根据所述序列号状态变更消息获取到所述源基站与待切换终端之间的数据传输情况,所述目的基站即可根据所述序列号状态变更消息对待切换终端与所述源基站之间的数据传输进行同步,降低了传输时延。
步骤407、待切换终端向目的基站发送重配完成消息。
本实施例中,在待切换终端接收到所述切换重配消息后,则所述待切换终端即可随机接入至所述目的小区。
具体的,若所述待切换终端判断出所述切换重配消息中配置了随机接入前导码(Preamble),则所述待切换终端即可使用非竞争随机接入流程接入所述目的小区。
若所述待切换终端判断出所述切换重配消息中没有配置所述Preamble,则所述待切换终端使用竞争随机接入流程接入所述目的小区。
为实现所述待切换终端随机接入至所述目的小区,则所述待切换终端可向所述目的基站发送切换重配完成消息(RRC Connection Reconfiguration Complete),所述切换重配完成消息用于向所述目的基站确认切换至所述目的小区过程完成。
步骤408、目的基站向核心网设备发送切换路径变更消息。
本实施例中,在所述目的基站接收到所述重配完成消息后,所述目的基站会向所述核心网设备发送切换路径变更消息(Path Switch Request),其中,所述切换路径变更消息用于通知所述核心网设备,所述待切换终端所接入的基站,由所述源基站变更为所述目的基站。
所述核心网设备接收到所述切换路径变更消息后,所述核心网设备不再向所述源基站发送待切换终端的用户面数据,而是将数据传输路径切换到所述目的基站侧,即,待切换 终端切换至所述目的小区之前,所述核心网设备在所述源基站和所述待切换终端之间创建数据传输路径,而在待切换终端切换至所述目的小区后,所述核心网设备在所述目的基站和所述待切换终端之间创建所述数据传输路径。
步骤409、核心网设备将切换路径变更响应消息发送给目的基站。
所述核心网设备接收到所述切换路径变更消息后,所述核心网设备即可将切换路径变更响应消息(Path Switch Request Acknowledge)发送给所述目的基站。
步骤410、目的基站向源基站发送待切换终端上下文释放消息。
本实施例中,在所述目的基站接收到所述核心网设备发送的所述切换路径变更响应消息后,所述目的基站即可确定出所述核心网设备已创建了所述目的基站和所述待切换终端之间的数据传输路径,则说明所述待切换终端切换至所述目的小区成功,为降低系统功耗,则所述目的基站可将上下文释放消息发送给所述源基站。
步骤411、源基站接收上下文释放消息。
本实施例中,在所述源基站接收到所述上下文释放消息后,所述源基站即可根据所述上下文释放消息释放与所述待切换终端对应的上下文。
采用本实施例所示的小区切换的方法,源基站可将携带有目标频率资源指示消息的切换请求消息发送给目的基站,所述目的基站即可根据所述目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,可见,所述目的基站通过识别出所述待切换终端所要接入的目标频率资源,在待切换终端发起目的小区接入时,所述待切换终端可直接接入至所述目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。
以下结合图5所示对本实施例所示的小区切换的方法的一种可选的实施例的具体的执行过程进行详细说明。
首先对图5所示的小区切换方法进行示例性说明,本实施例所示的小区切换方法所应用的场景为,为所述源小区进行服务的基站和为所述目的小区进行服务的基站属于不同的基站,即如图1所示,为所述源小区进行服务的基站为所述源基站,而所述源基站和所述目的基站之间不具有X2接口,或所述源基站和所述目的基站之间的X2接口不可用,本应用场景所示,所述MME和所述源基站之间以及所述MME和所述目的基站之间配置了S1接口,以使所述源基站和所述MME之间,所述目的基站和所述MME之间通过S1接口进行信息相互。
步骤501、源基站向待切换终端发送测量配置消息。
步骤502、待切换终端向源基站发送测量报告消息。
本实施例所示的步骤501至步骤502的具体执行过程,请详见图4所示的步骤401至步骤402所示,具体执行过程在本实施例中不做赘述。
步骤503、源基站向MME发送切换指示消息。
在所述源基站接收到所述测量报告消息后,所述源基站即可根据所述测量报告消息进行切换判决以判决所述待切换终端是否切换至所述目的小区。
所述源基站对所述测量报告消息进行判决的过程的说明,请详见图3所示的实施例, 具体在本实施例中不做赘述。
在所述源基站判决出所述待切换终端需要切换至所述目的小区时,所述源基站可通过S1接口所述MME发送所述切换指示消息。
所述源基站配置的所述切换指示消息所包括的具体内容请参见图3所示的切换请求消息,具体在本实施例中不做赘述,即本实施例所示的所述切换指示消息包括所述目的小区的CGI以及所述目标频率资源指示消息,对所述目标频率资源指示消息的具体说明请详见图3所示的实施例,具体在本实施例中不做赘述。
本实施例中,所述MME在接收到所述源基站发送的所述切换指示消息后,对所述切换指示消息是否合法进行判断,若所述MME判断出所述切换指示消息合法,则触发所述MME向所述目的基站发送切换请求消息的流程。
具体的,本实施例所示的所述MME通过判断所述切换指示消息的字段是否符合预设要求,若所述MME判断出所述切换指示消息所包括的字段符合预设要求,则所述MME能够成功的识别出所述请求指示消息中所包括的所述目的小区的CGI以及所述目标频率资源指示消息。
在所述MME判断出所述切换指示消息符合所述预设要求,则所述MME即可确定出所述切换指示消息合法。
步骤504、MME向目的基站发送切换请求消息。
在所述MME判断出所述切换指示消息合法的情况下,所述MME即可配置所述切换请求消息,所述切换请求消息包括用于向所述目的基站指示所述目的小区的CGI以及包括目标频率资源指示消息。
具体的,所述MME通过S1接口相所述目的基站发送所述切换请求消息,所述切换请求消息包括有所述目标频率资源指示消息,以使所述目的基站根据所述切换请求消息即可获取到所述待切换终端所要接入的所述目标频率资源。
步骤505、目的基站向MME发送切换请求响应消息。
具体的,所述目的基站在接收到所述请求消息后,即可通过S1接口向所述MME发送所述切换请求响应消息。
所述切换请求响应消息的具体说明,请详见图4所示的步骤404所示,具体在本实施例中不做赘述,只要本实施例所示的切换请求响应消息包括有所述指示消息即可。
所述目的基站在接收到所述请求消息后,可为所述待切换终端进行资源预留,所述目的基站对所述待切换终端进行资源预留的过程的具体说明,请详见图3所示的实施例,具体在本实施例中不做赘述。
步骤506、MME向源基站发送切换命令消息。
本实施例所示的MME通过向所述基站发送所述切换命令消息(Handover Command),向所述源基站指示待切换终端可接入至所述目的小区。
步骤507、源基站向待切换终端发送切换重配消息。
本实施例所示的步骤507的具体执行过程,请详见图3所示的步骤306所示,具体执行过程,在本实施例中不做赘述。
步骤508、源基站向MME发送基站状态变更消息。
具体的,在所述源基站接收到所述切换请求响应消息后,所述源基站即可将基站状态变更消息(eNodeB Status Transfer)发送给所述MME,所述MME根据所述基站状态变更消息即可确定出所述待切换终端所接入的小区由所述源小区变更为所述目的小区,从而使得所述MME创建所述目的基站和所述待切换终端之间的数据传输路径。
所述MME在获取到所述基站状态变更消息的情况下,所述MME即可获取所述源基站和所述待切换终端之间的数据传输情况,并配置用于指示所述源基站和所述待切换终端之间的数据传输情况的MME状态变更消息(MME Status Transfer)。
步骤509、MME向目的基站发送MME状态变更消息。
本实施例中,MME可将已配置的所述MME状态变更消息发送给所述目的基站,所述目的基站即可根据所述MME状态变更消息获取到所述源基站与待切换终端之间的数据传输情况,所述目的基站即可根据所述MME状态变更消息对待切换终端与所述源基站之间的数据传输进行同步,降低了传输时延。
步骤510、待切换终端向目的基站发送重配完成消息。
本实施例所示的步骤510的具体执行过程,请详见图4所示的步骤407所示,具体在本实施例中不做赘述。
步骤511、目的基站向MME发送切换完成通知消息。
本实施例中,在所述目的基站根据所述重配完成消息确定出所述待切换终端已成功接入至所述目的小区的情况下,则所述目的基站即可向所述MME发送切换完成通知消息(Handover Notify),所述切换完成通知消息用于通知所述MME,所述待切换终端已成功接入至所述目的小区。
步骤512、MME向源基站发送待切换终端上下文释放消息。
本实施例中,在所述MME接收到所述切换完成通知消息后,可将上下文释放消息发送给所述源基站。
步骤513、源基站接收上下文释放消息。
本实施例中,在所述源基站接收到所述上下文释放消息后,所述源基站即可根据所述上下文释放消息释放与所述待切换终端对应的上下文。
采用本实施例所示的小区切换的方法,源基站可将目标频率资源指示消息通过MME发送给目的基站,所述目的基站即可根据所述目标频率资源指示消息确定出所述待切换终端所要接入的目标频率资源,可见,所述目的基站通过识别出所述待切换终端所要接入的目标频率资源,提升了待切换终端接入所述目的小区的准确性,有效的避免待切换终端接入至错误的频率资源的可能性,提高了小区切换的成功率,而且降低了小区切换的时延。
以下结合图6所示从功能模块的角度对本申请所提供的源基站的具体结构进行示例性说明,其中,本实施例所示的所述源基站的具体说明请参见图1以及图2所示,且本实施例所示的所述源基站用于执行小区切换的方法,执行小区切换的方法的具体执行过程,请详见图3至图5所示:
所述源基站包括:
确定单元601,用于确定目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务;
可选的,所述确定单元601具体包括:
第一确定模块6011,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
第一判断模块6012,用于若判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
可选的,所述确定单元601具体包括:
第二确定模块6013,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
第二判断模块6014,用于若判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
可选的,所述确定单元601具体包括:
第三确定模块6015,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
第三判断模块6016,用于若判断出所述待切换终端所支持的频点同时位于目标主频段和目标从频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与所述目标主频段对应的频点。
可选的,所述确定单元601具体包括:
第四确定模块6017,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
创建模块6018,用于创建优先级列表,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
第五确定模块6019,用于确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
第一发送单元602,用于向所述目的基站发送目标频率资源指示消息,所述目标频率资源指示消息用于指示所述目标频率资源;
可选的,所述第一发送单元602具体包括:
配置模块6021,用于配置切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息;
发送模块6022,用于通过X2接口向所述目的基站发送所述切换请求消息。
可选的,所述第一发送单元602还用于,通过S1接口向移动管理实体MME发送切换指示消息,所述切换指示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
可选的,所述第一发送单元602还用于,通过S1接口向移动管理实体MME发送切换指示消息,所述切换指示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
接收单元603,用于接收所述目的基站发送的指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
可选的,所述接收单元603还用于,通过X2接口接收所述目的基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息;
可选的,所述接收单元603还用于,通过S1接口接收所述MME发送的切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息;
第二发送单元604,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
第三发送单元605,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
采用本实施例所示的源基站执行小区切换的方法的有益效果的说明,请详见上述实施例所示,具体在本实施例中不做赘述。
以下结合图7所示从功能模块的角度对本申请所提供的目的基站的具体结构进行示例性说明,其中,本实施例所示的所述目的基站的具体说明请参见图1以及图2所示,且本实施例所示的所述目的基站用于执行小区切换的方法,执行小区切换的方法的具体执行过程,请详见图3至图5所示:
所述目的基站包括:
接收单元701,用于接收源基站发送的目标频率资源指示消息,所述目标频率资源指示消息用于指示目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的基站用于为所述目的小区进行服务;
可选的,所述接收单元701还用于,通过X2接口接收切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息。
可选的,所述接收单元701还用于,通过S1接口接收移动管理实体MME发送切换请求 消息,所述切换请求消息包括所述目标频率资源指示消息。
发送单元702,用于向所述源基站发送指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
可选的,所述发送单元702还用于,通过X2接口向所述源基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息。
可选的,所述发送单元702还用于,通过S1接口向所述MME发送切换请求响应消息,以使所述MME通过S1接口向所述源基站发送所述切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息。
采用本实施例所示的目的基站执行小区切换的方法的有益效果的说明,请详见上述实施例所示,具体在本实施例中不做赘述。
以下从实体硬件的角度对基站的结构进行示例性说明,本实施例所示的基站可为上述实施例所示的源基站或上述实施例所示的目的基站,本实施例所示的所述基站用于执行上述实施例所示的小区切换的方法,具体执行过程,请详见上述实施例所示,具体在本实施例中不做赘述。
如图8所示,基站800包括至少一个处理器801,通信总线802,存储器803以及至少一个通信接口804。
处理器801可以是一个通用中央处理器(central processing unit,CPU),微处理器,特定应用集成电路(application-specific integrated circuit,ASIC),或一个或多个用于控制本发明方案程序执行的集成电路。
通信总线802可包括一通路,在上述组件之间传送信息。
通信接口804,使用任何收发器一类的装置,用于与其他设备或通信网络通信,如以太网,无线接入网(radio access network,RAN),无线局域网(wireless local area networks,WLAN)等。
存储器803可以是只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(random access memory,RAM)或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory,EEPROM)、只读光盘(compact disc read-only memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。存储器可以是独立存在,通过总线与处理器相连接。存储器也可以和处理器集成在一起。
其中,存储器803用于存储执行本发明方案的应用程序代码,并由处理器801来控制执行。处理器801用于执行存储器803中存储的应用程序代码,从而实现的逻辑功能,以实现上述实施例所示的小区切换的方法。
在具体实现中,作为一种实施例,处理器801可以包括一个或多个CPU,例如图8中 的CPU0和CPU1。
在具体实现中,作为一种实施例,基站800可以包括多个处理器,例如图8中的处理器801和处理器808。这些处理器中的每一个可以是一个单核(single-CPU)处理器,也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
具体的,本申请还包括一种存储一个或多个程序的计算机可读存储介质,所述一个或多个程序包括指令,所述指令当被源基站或目的基站执行时可实现如上述实施例所示的小区切换的方法。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (30)

  1. 一种小区切换的方法,其特征在于,包括:
    源基站确定目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务;
    所述源基站向所述目的基站发送目标频率资源指示消息,所述目标频率资源指示消息用于指示所述目标频率资源;
    所述源基站接收所述目的基站发送的指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
  2. 根据权利要求1所述的方法,其特征在于,所述源基站确定目标频率资源包括:
    所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    若所述源基站判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
  3. 根据权利要求1所述的方法,其特征在于,所述源基站确定目标频率资源包括:
    所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    若所述源基站判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
  4. 根据权利要求1所述的方法,其特征在于,所述源基站确定目标频率资源包括:
    所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    若所述源基站判断出所述待切换终端所支持的频点同时位于目标主频段和目标从频段的频率范围内,则所述源基站确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与所述目标主频段对应的频点。
  5. 根据权利要求1所述的方法,其特征在于,所述源基站确定目标频率资源包括:
    所述源基站确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    所述源基站创建优先级列表,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
    所述源基站确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
  6. 根据权利要求1至5任一项所述的方法,其特征在于,所述源基站向所述目的基站发送目标频率资源指示消息包括:
    所述源基站配置切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息;
    所述源基站通过X2接口向所述目的基站发送所述切换请求消息。
  7. 根据权利要求6所述的方法,其特征在于,所述源基站接收所述目的基站发送的指示消息包括:
    所述源基站通过X2接口接收所述目的基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息;
    所述源基站接收所述目的基站发送的指示消息之后,所述方法还包括:
    所述源基站将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
  8. 根据权利要求1至5任一项所述的方法,其特征在于,所述源基站向所述目的基站发送目标频率资源指示消息包括:
    所述源基站通过S1接口向移动管理实体MME发送切换指示消息,所述切换指示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
  9. 根据权利要求8所述的方法,其特征在于,所述源基站接收所述目的基站发送的指示消息包括:
    所述源基站通过S1接口接收所述MME发送的切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息;
    所述源基站接收所述目的基站发送的指示消息之后,所述方法还包括:
    所述源基站将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
  10. 一种小区切换的方法,其特征在于,包括:
    目的基站接收源基站发送的目标频率资源指示消息,所述目标频率资源指示消息用于指示目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的基站用于为所述目的小区进行服务;
    所述目的基站向所述源基站发送指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
  11. 根据权利要求10所述的方法,其特征在于,所述目的基站接收源基站发送的目标频率资源指示消息包括:
    所述目的基站通过X2接口接收切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息。
  12. 根据权利要求10所述的方法,其特征在于,所述目的基站向所述源基站发送指示消息包括:
    所述目的基站通过X2接口向所述源基站发送的切换请求响应消息,所述切换请求响 应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息。
  13. 根据权利要求12所述的方法,其特征在于,所述目的基站接收源基站发送的目标频率资源指示消息包括:
    所述目的基站通过S1接口接收移动管理实体MME发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
  14. 根据权利要求13所述的方法,其特征在于,所述目的基站向所述源基站发送指示消息包括:
    所述目的基站通过S1接口向所述MME发送切换请求响应消息,以使所述MME通过S1接口向所述源基站发送所述切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息。
  15. 一种源基站,其特征在于,包括:
    确定单元,用于确定目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的小区由目的基站进行服务;
    第一发送单元,用于向所述目的基站发送目标频率资源指示消息,所述目标频率资源指示消息用于指示所述目标频率资源;
    接收单元,用于接收所述目的基站发送的指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
  16. 根据权利要求15所述的源基站,其特征在于,所述确定单元包括:
    第一确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    第一判断模块,用于若判断出所述待切换终端所支持的频点位于目标主频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标主频点为与所述目标主频段对应的频点。
  17. 根据权利要求15所述的源基站,其特征在于,所述确定单元包括:
    第二确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    第二判断模块,用于若判断出所述待切换终端所支持的频点位于目标从频段的频率范围内,则确定所述目标频率资源为所述目标从频段或目标从频点,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标从频点为与所述目标从频段对应的频点。
  18. 根据权利要求15所述的源基站,其特征在于,所述确定单元包括:
    第三确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    第三判断模块,用于若判断出所述待切换终端所支持的频点同时位于目标主频段和目 标从频段的频率范围内,则确定所述目标频率资源为所述目标主频段或目标主频点,所述目标主频段为所述目的小区所支持的所述至少一个主频段中的一个主频段,所述目标从频段为所述目的小区所支持的所述至少一个从频段中的一个从频段,所述目标主频点为与所述目标主频段对应的频点。
  19. 根据权利要求15所述的源基站,其特征在于,所述确定单元包括:
    第四确定模块,用于确定所述目的小区所支持的至少一个主频段以及至少一个从频段;
    创建模块,用于创建优先级列表,所述优先级列表包括所述目的基站所支持的多个频段,且所述多个频段按所述待切换终端与所述多个频段中的任一频段之间创建载波聚合CA时的传输带宽由大到小的顺序进行排序;
    第五确定模块,用于确定所述目标频率资源为所述优先级列表中具有最高优先级的频段,或,所述目标频率资源为所述优先级列表中具有最高优先级的频段所对应的频点。
  20. 根据权利要求15至19任一项所述的源基站,其特征在于,所述第一发送单元包括:
    配置模块,用于配置切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息;
    发送模块,用于通过X2接口向所述目的基站发送所述切换请求消息。
  21. 根据权利要求20所述的源基站,其特征在于,所述接收单元还用于,通过X2接口接收所述目的基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息;
    所述源基站还包括:
    第二发送单元,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
  22. 根据权利要求15至19任一项所述的源基站,其特征在于,所述第一发送单元还用于,通过S1接口向移动管理实体MME发送切换指示消息,所述切换指示消息包括所述目标频率资源指示消息,以使所述MME通过S1接口向所述目的基站发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
  23. 根据权利要求22所述的源基站,其特征在于,所述接收单元还用于,通过S1接口接收所述MME发送的切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息;
    所述源基站还包括:
    第三发送单元,用于将所述目标频率资源指示消息发送给所述待切换终端,以使所述待切换终端根据所述目标频率资源指示消息切换至所述目的小区的所述目标频率资源。
  24. 一种目的基站,其特征在于,包括:
    接收单元,用于接收源基站发送的目标频率资源指示消息,所述目标频率资源指示消息用于指示目标频率资源,所述目标频率资源为请求从源小区切换至目的小区的待切换终 端所要切换的频率资源,所述源基站用于为所述源小区进行服务,所述目的基站用于为所述目的小区进行服务;
    发送单元,用于向所述源基站发送指示消息,所述指示消息用于指示允许所述待切换终端切换至所述目标频率资源。
  25. 根据权利要求24所述的目的基站,其特征在于,所述接收单元还用于,通过X2接口接收切换请求消息,所述切换请求消息用于指示所述待切换终端切换至所述目的小区,且所述切换请求消息包括所述目标频率资源指示消息。
  26. 根据权利要求24所述的目的基站,其特征在于,所述发送单元还用于,通过X2接口向所述源基站发送的切换请求响应消息,所述切换请求响应消息用于指示所述目的基站已成功接收到所述切换请求消息,且所述切换请求消息包括所述目标频率资源指示消息以及所述指示消息。
  27. 根据权利要求26所述的目的基站,其特征在于,所述接收单元还用于,通过S1接口接收移动管理实体MME发送切换请求消息,所述切换请求消息包括所述目标频率资源指示消息。
  28. 根据权利要求27所述的目的基站,其特征在于,所述发送单元还用于,通过S1接口向所述MME发送切换请求响应消息,以使所述MME通过S1接口向所述源基站发送所述切换请求响应消息,所述切换请求响应消息包括目标频率资源指示消息以及所述指示消息。
  29. 一种基站,其特征在于,包括处理器和存储器,其中,
    所述存储器中存有计算机可读程序;
    所述处理器通过运行所述存储器中的程序,在所述基站作为源基站时,用于执行上述权利要求1至9任一项所示的方法,在所述基站作为目的基站时,用于执行上述权利要求10至14任一项所述的方法。
  30. 一种存储一个或多个程序的计算机可读存储介质,其特征在于,所述一个或多个程序包括指令,所述指令当被源基站执行时使所述源基站执行如权利要求1至9任一项所述的方法,以及所述指令当被目的基站执行时使所述目的基站执行如权利要求10至14任一项所述的方法。
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