CN109640250B - Directional switching method and device - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/026—Services making use of location information using location based information parameters using orientation information, e.g. compass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
Abstract
The application provides a directional switching method and a directional switching device, relates to the field of communication, and is used for performing directional switching on a terminal. The method comprises the following steps: when the movement speed of the terminal is greater than a preset threshold value, the terminal acquires the movement direction of the terminal; the terminal determines a plurality of adjacent cells of a main service cell in the movement direction; determining an active set and a monitoring set from a plurality of adjacent cells, and establishing connection with cells in the active set; the terminal reports a switching event to the first network equipment; the terminal executes the updating indication determined by the first network equipment according to the switching event; and establishes a connection with the updated primary serving cell and/or the cells in the updated active set. Therefore, the directional switching method provided by the application shortens the switching time of the terminal between different cells, and avoids the switching failure and call drop events of the terminal in a high-speed motion scene.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a directional handover method and apparatus.
Background
The directional switching under the high-speed railway scene at present generally adopts a soft switching technology, namely when a terminal is switched among different cells with different channel center frequency points but the same channel carrier frequency, the terminal is kept connected with a current cell when establishing connection with a target cell to be switched; and when the terminal establishes stable connection with the target cell, the terminal is disconnected with the current cell.
However, in a high-speed rail scenario, since a high-speed rail line is generally fixed, the size of the handover area is fixed, for example, some cells are generally fixedly included along the high-speed rail line, and the handover area generally refers to a junction of the cells. In the case of high-speed movement of the terminal, the faster the movement speed of the terminal is, the shorter the time for the terminal to perform soft handover is. When the time of the terminal passing through the switching area is less than the minimum time of the terminal soft switching, the soft switching process cannot be carried out, and the terminal is dropped.
Disclosure of Invention
The application provides a directional switching method, which can shorten the switching time of a terminal in the terminal movement process and avoid the terminal call drop.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, the present application provides a directional handover method, including: when the movement speed of the terminal is greater than a preset threshold value, the terminal acquires the movement direction of the terminal; the terminal determines a plurality of adjacent cells of a main service cell in the motion direction; determining an active set and a monitoring set from the plurality of neighboring cells, and establishing connection with cells in the active set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cell, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell; the terminal reports a switching event to the first network equipment; the handover event comprises a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set; the terminal executes the updating indication determined by the first network equipment according to the switching event; establishing connection with the updated main service cell and/or the updated cells in the active set; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
In a second aspect, the present application provides another directional handover method, including: a first network device receives a switching event reported by a terminal; the switching event comprises the signal intensity of a main service cell, the signal intensity of a cell in an active set and the signal intensity of a cell in a monitoring set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength in the adjacent cell of the main service cell in the moving direction meets a preset condition, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell; the first network equipment determines an updating instruction according to the switching event; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set; and the first network equipment sends the updating indication to the terminal.
In a third aspect, the present application provides a directional switching apparatus, comprising: the receiving module is used for acquiring the motion direction of the terminal; a processing module, configured to determine multiple neighboring cells of a primary serving cell in the moving direction; determining an active set and a monitoring set from the plurality of neighboring cells, and establishing connection with cells in the active set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cell, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell; a sending module, configured to report a handover event to a first network device; the handover event comprises a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set; the processing module is further configured to execute an update instruction determined by the first network device according to the handover event; establishing connection with the updated main service cell and/or the updated cells in the active set; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
In a fourth aspect, the present application provides another directional switching apparatus, comprising: the receiving module is used for receiving the switching event reported by the terminal; the switching event comprises the signal intensity of a main service cell, the signal intensity of a cell in an active set and the signal intensity of a cell in a monitoring set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength in the adjacent cell of the main service cell in the moving direction meets a preset condition, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell; a processing module for determining an update indication according to the handover event; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set; and the sending module is used for sending the updating indication to the terminal.
In a fifth aspect, the present application provides a computer-readable storage medium, in which instructions are stored, and when the instructions are executed by a computer, the computer executes the service transmission method according to the first aspect and the second aspect.
According to the directional switching method, when the movement speed of the terminal is larger than a preset value, the terminal determines the movement direction of the terminal, and determines the adjacent cell of the current main service cell according to the movement direction of the terminal; and determining an active set and a monitoring set from the adjacent cell, reporting a switching event to the first network equipment, and making an updating instruction by the first network equipment. And the terminal updates the main service cell and/or the active set according to the updating indication and establishes connection with all the cells in the updated main service cell and/or the updated active set. Therefore, in the directional switching method provided by the application, the terminal only determines the active set and the monitoring set from the neighbor list in the moving direction, and the cells in the opposite moving direction of the terminal are shielded. Meanwhile, the first network equipment carries out updating indication according to the switching event reported by the terminal, and the first network equipment does not need to respectively judge after the terminal reports the link increasing, deleting and switching events respectively. The switching time is shortened, and switching failure and call drop events of the terminal in a high-speed motion scene are avoided.
Drawings
Fig. 1 is a flowchart of a directional handover method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a directional switching apparatus applied to a terminal according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a directional switch apparatus applied to a first network device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another directional switching apparatus applied to a terminal according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another directional switching apparatus applied to a first network device according to an embodiment of the present disclosure.
Detailed Description
A method and an apparatus for directional switching according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.
The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.
Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.
The directional handover method provided in this embodiment may be applied to a communication network, which may be, for example, a Long Term Evolution (LTE) network, a Global System for Mobile communications (GSM), a Code Division Multiple Access (CDMA) System, a Time Division Multiple Access (TDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA) System, an Orthogonal Frequency Division Multiple Access (OFDMA) System, a General Packet Radio Service (GPRS, General Packet Radio Service) System, a next-generation Mobile communication System, or other such communication systems.
The communication network comprises a core network and an access network, and the terminal accesses the core network through the access network. The terminal in the embodiments of the present application may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Device (User Device), or a User Equipment (User Equipment).
An embodiment of the present application provides a directional handover method, as shown in fig. 1, the method includes S101-S111:
s101, the terminal judges whether the self movement speed is larger than a preset threshold value.
Illustratively, the preset threshold is 120 km/h.
If the movement speed of the terminal is greater than the preset threshold value, executing the following steps S102-S108; if the moving speed of the terminal is less than or equal to the preset threshold, the following steps S109 to S111 are performed.
S102, the terminal acquires the self movement direction.
Optionally, in an implementation manner, the terminal sends the motion parameter to a second network device, and the second network device determines the motion direction of the terminal according to the motion parameter. Further, the terminal may acquire its own moving direction from the second network device.
The second network device is a network device in an access network in a communication network, and exemplarily, the second network device is a base station (Node B). The motion parameters include Location Area Codes (LAC), Cell Identities (CI), and Time intervals (TS) of all connected primary serving cells in a preset period. The LAC and the CI are used for determining the position of the terminal, and the TS is used for determining the time of the terminal at different positions.
Illustratively, in a high-speed rail scene, the running direction of the high-speed rail is divided into an uplink direction and a downlink direction; the second network device is a base station. The base station determines the position A of the terminal according to the LAC and the CI of one TS on the terminal, and determines the position B of the terminal according to the current LAC and the CI of the terminal; and if the position B is in the uplink direction of the position A, the base station determines that the movement direction of the terminal is the uplink direction of the high-speed rail line.
Optionally, in another implementation manner, the terminal records the position relationship of the terminal at different times, and determines the movement direction of the terminal according to the record.
S103, the terminal determines a plurality of adjacent cells of the main service cell in the motion direction.
And the main service cell is a cell for establishing connection and transmitting data currently by the terminal. The neighbor cell is a cell in a neighbor cell list in the motion direction, which is pre-stored in the main serving cell.
Specifically, the primary serving cell prestores a neighbor cell list in the moving direction, where the neighbor cell list includes at least one neighbor cell. The terminal sends the motion direction to the main service cell, and the main service cell determines a corresponding adjacent cell list according to the motion direction; and the terminal acquires a neighbor list corresponding to the motion direction.
Illustratively, in a high-speed rail scene, a high-speed rail private network cell specially established for a high-speed rail user is pre-established along a high-speed rail line. And when the terminal is in a high-speed rail scene, the main service cell and the plurality of adjacent cells are high-speed rail private network cells. The operator pre-configures adjacent areas of each high-speed rail private network cell in the uplink and downlink directions along the high-speed rail in the high-speed rail private network cell. Illustratively, seven high-speed rail private network cells are sequentially distributed A, B, C, D, E, F, G along the uplink direction of a high-speed rail at a certain section of high-speed rail. If the high-speed rail private network cell D is the main service cell, the neighbor cell list set by the high-speed rail private network cell D along the uplink direction of the high-speed rail comprises E, F, G high-speed rail private network cells; and A, B, C three high-speed rail private network cells are included in the neighbor list arranged in the downlink direction of the high-speed rail.
S104, the terminal determines an active set and a monitoring set from the plurality of adjacent cells and establishes connection with the cells in the active set.
The active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cell, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell.
Specifically, after determining the plurality of neighboring cells, the terminal measures the signal strengths of all cells in the neighboring cells, and selects cells with signal strengths meeting preset conditions from the neighboring cells to form an active set; and selecting at least one cell which can be measured by the terminal to obtain the signal strength but does not meet the preset condition from the adjacent cells to form a monitoring set. And the terminal establishes connection with all cells in the active set.
S105, the terminal reports the switching event to the first network equipment.
The first Network device is a Network device in an access Network in a communication Network, and in a 3G Network, for example, the first Network device is a Radio Network Controller (RNC). The handover event includes a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set.
Specifically, after the terminal determines an active set and a monitored set, along with the movement of the terminal, the signal strength of the primary serving cell, the signal strength of the cells in the active set, and the signal strength of the cells in the monitored set are constantly changed. And the terminal reports the signal strength of the main service cell, the signal strength of the cell in the active set and the signal strength of the cell in the monitoring set to the first network equipment as the first switching event.
S106, the first network equipment determines an updating instruction according to the switching event.
Wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
Specifically, the first network device determines whether the number of cells in the active set is equal to a preset value. The preset value is the maximum value of the number of the cells in the preset active set.
And if the number of the cells in the active set is equal to the preset value, determining a first cell, wherein the first cell is the cell with the best signal strength in the active set and the monitoring set. If the signal strength of the primary serving cell is less than the signal strength of the first cell, the update indication includes replacing the primary serving cell with the first cell.
After determining the first cell, determining whether a second cell and a third cell exist; wherein the second cell is a cell in the monitoring set; the third cell is a cell in the active set; and the signal strength of the second cell is greater than the signal strength of the third cell. If the second cell and the third cell exist, the updating indication comprises adding the second cell to the active set and deleting the third cell from the active set.
If the number of the cells in the active set is smaller than the preset value and the signal strengths of all the cells in the active set are smaller than the preset threshold value, the update indication includes adding a fourth cell to the active set, where the fourth cell is a cell with the strongest signal strength in the monitoring set.
S107, the first network equipment sends the updating indication to the terminal.
And S108, the terminal executes the updating indication and establishes connection with the updated main service cell and/or all the cells in the updated active set.
S109, the terminal measures the signal intensity of the main service cell and the signal intensity of the first set, and reports the signal intensity to the first network equipment.
The first set is a set formed by cells in all neighbor cell lists configured in advance in the main service cell.
Illustratively, five high-speed rail private network cells are sequentially distributed A, B, C, D, E, F, G along the uplink direction of a high-speed rail at a certain section of a high-speed rail line. If the high-speed rail private network cell D is a main serving cell, A, B, C, E, F, G six cells are included in the first set respectively.
S110, the first network equipment determines an updating instruction.
Specifically, the first network device compares the signal strengths of all cells in the first set with the signal strength of the current primary serving cell. If a fifth cell exists in the first set, the updating indication comprises replacing the fifth cell with a current primary serving cell. Wherein the fifth cell is a cell in the first set whose signal strength is greater than that of the current primary serving cell.
S111, the terminal executes the updating indication; and establishing a connection with the fifth cell.
According to the directional switching method, when the movement speed of the terminal is larger than a preset value, the terminal determines the movement direction of the terminal, and determines the adjacent cell of the current main service cell according to the movement direction of the terminal; and determining an active set and a monitoring set from the adjacent cell, reporting a switching event to the first network equipment, and making an updating instruction by the first network equipment. And the terminal updates the main service cell and/or the active set according to the updating indication and establishes connection with all the cells in the updated main service cell and/or the updated active set. Therefore, in the directional switching method provided by the application, the terminal only determines the active set and the monitoring set from the neighbor list in the moving direction, and the cells in the opposite moving direction of the terminal are shielded. Meanwhile, the first network equipment carries out updating indication according to the switching event reported by the terminal, and the first network equipment does not need to respectively judge after the terminal reports the link increasing, deleting and switching events respectively. The switching time is shortened, and switching failure and call drop events of the terminal in a high-speed motion scene are avoided.
As shown in fig. 2, the present application provides a directional switching apparatus, which is applied in a terminal, and is used for executing the foregoing directional switching method, and the apparatus includes:
a receiving module 201, configured to obtain a motion direction of the terminal.
A processing module 202, configured to determine multiple neighboring cells of the primary serving cell in the moving direction. Determining an active set and a monitoring set from the plurality of neighboring cells, and establishing connection with cells in the active set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cell, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by the terminal but the signal strength does not meet the preset condition in the adjacent cell.
A sending module 203, configured to report a handover event to a first network device; the handover event includes a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set.
The processing module 202 is further configured to execute an update instruction determined by the first network device according to the handover event; establishing connection with the updated main service cell and/or the updated cells in the active set; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
Optionally, the sending module 203 is further configured to send a motion parameter to a second network device, where the motion parameter includes a location area code LAC, a cell identifier CI, and a time interval TS of a main serving cell connected by the terminal in a preset period; the LAC and the CI are used for determining the position of the terminal, and the TS is used for determining the time of the terminal at different positions. The receiving module 201 is further configured to obtain a terminal moving direction determined by the second network device according to the moving parameter.
Optionally, the receiving module 201 is further configured to obtain the neighbor cell list; the neighbor cell list is a cell list which is stored in the main service cell in advance in the moving direction, and the neighbor cell list comprises at least one neighbor cell; and the terminal determines a plurality of adjacent cells of the main service cell in the motion direction.
As shown in fig. 3, the present application provides another directional switching apparatus, which is applied in a first network device, and is configured to perform the foregoing directional switching method, where the apparatus includes:
a receiving module 301, configured to receive a handover event reported by a terminal; the switching event comprises the signal intensity of a main service cell, the signal intensity of a cell in an active set and the signal intensity of a cell in a monitoring set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength in the adjacent cell of the main service cell in the moving direction meets a preset condition, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell.
A processing module 302, configured to determine an update indication according to the handover event; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
A sending module 303, configured to send the update indication to the terminal.
Optionally, the processing module is further configured to: judging whether the number of the cells in the active set is equal to a preset value or not; the preset value is the maximum value of the number of cells in the preset active set; if the number of the cells in the active set is equal to the preset value, determining a first cell, wherein the first cell is a cell with the best signal strength in the active set and the monitoring set; if the signal strength of the primary serving cell is less than the signal strength of the first cell, the update indication comprises replacing the primary serving cell with the first cell; if the number of the cells in the active set is smaller than the preset value and the signal strengths of the cells in the active set are smaller than the preset threshold value, the update indication includes adding a fourth cell to the active set, where the fourth cell is a cell with the strongest signal strength in the monitoring set.
Optionally, the processing module is further configured to: judging whether a second cell and a third cell exist or not; wherein the second cell is a cell in the monitoring set; the third cell is a cell in the active set; and the signal strength of the second cell is greater than the signal strength of the third cell; if the second cell and the third cell exist, the updating indication comprises adding the second cell to the active set and deleting the third cell from the active set.
Fig. 4 shows a schematic diagram of another possible structure of the directional switching device applied to the terminal in the above embodiment. The device includes: a processor 402 and a communication interface 403. The processor 402 is used to control and manage the actions of the device, e.g., to perform the steps performed by the processing module 201 described above, and/or other processes for performing the techniques described herein. The communication interface 403 is used to support communication between the apparatus and other network entities, for example, to perform the steps performed by the receiving module 201 and the sending module 203. The terminal may further comprise a memory 401 and a bus 404, the memory 401 being used for storing program codes and data of the device.
The processor 402 may implement or execute various illustrative logical blocks, units, and circuits described in connection with the disclosure herein. The processor may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, units, and circuits described in connection with the disclosure. The processor may be a combination that implements a computing function, and may include, for example, a combination of one or more microprocessors, a combination of a Digital Signal Processor (DSP) and a microprocessor, or the like.
The bus 404 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 404 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.
Fig. 5 shows another possible structure diagram of the directional switching device applied to the first network device in the above embodiment. The device includes: a processor 502 and a communication interface 503. The processor 502 is used to control and manage the actions of the device, e.g., to perform the steps performed by the processing module 302 described above, and/or to perform other processes for the techniques described herein. The communication interface 503 is used to support communication between the apparatus and other network entities, for example, to perform the steps performed by the receiving module 301 and the sending module 303. The apparatus may further comprise a memory 501 and a bus 504, the memory 501 being used for storing program codes and data of the apparatus.
The processor 502 described above may implement or execute various exemplary logical blocks, units and circuits described in connection with the present disclosure. The processor may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, units, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
The bus 504 may be an EISA bus or the like. The bus 504 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
It is clear to those skilled in the art from the foregoing description of the embodiments that, for convenience and simplicity of description, the foregoing division of the functional units is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device may be divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer executes the instructions, the computer executes each step executed by the terminal or the first network device in the method flow shown in the foregoing method embodiment.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application.
Claims (14)
1. A method of directional handover, the method comprising:
when the movement speed of the terminal is greater than a preset threshold value, the terminal acquires the movement direction of the terminal;
the terminal determines a plurality of adjacent cells of a main service cell in the motion direction; determining an active set and a monitoring set from the plurality of neighboring cells, and establishing connection with cells in the active set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cells, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by the terminal but the signal strength does not meet the preset condition in the adjacent cells;
the terminal reports a switching event to the first network equipment; the handover event comprises a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set;
the terminal executes the updating indication determined by the first network equipment according to the switching event; establishing connection with the updated main service cell and/or the updated cells in the active set; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
2. The directional switching method according to claim 1, wherein the terminal obtaining the motion direction of the terminal comprises:
the terminal sends motion parameters to second network equipment, wherein the motion parameters comprise a location area code LAC, a cell identifier CI and a time interval TS of a main service cell which is connected by the terminal in a preset period; the LAC and the CI are used for determining the position of the terminal, and the TS is used for determining the time of the terminal at different positions;
and the terminal acquires the terminal movement direction determined by the second network equipment according to the movement parameters.
3. The directional handover method according to claim 1, wherein the primary serving cell pre-stores a neighbor cell list in the moving direction, and the neighbor cell list comprises at least one neighbor cell; the determining, by the terminal, a plurality of neighboring cells of the primary serving cell in the moving direction includes:
and the terminal acquires the neighbor cell list.
4. A method of directional handover, the method comprising:
a first network device receives a switching event reported by a terminal; the switching event comprises the signal intensity of a main service cell, the signal intensity of a cell in an active set and the signal intensity of a cell in a monitoring set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength in a neighboring cell of the main serving cell in the motion direction of the terminal meets a preset condition, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by the terminal but the signal strength does not meet the preset condition in the neighboring cell;
the first network equipment determines an updating instruction according to the switching event; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set;
and the first network equipment sends the updating indication to the terminal.
5. A directional handover method according to claim 4, wherein the first network device determining an update indication in dependence on the handover event comprises:
the first network equipment judges whether the number of the cells in the active set is equal to a preset value or not; the preset value is the maximum value of the number of cells in the preset active set;
if the number of the cells in the active set is equal to the preset value, determining a first cell, wherein the first cell is a cell with the best signal strength in the active set and the monitoring set;
if the signal strength of the primary serving cell is less than the signal strength of the first cell, the update indication includes replacing the primary serving cell with the first cell.
6. A directional handover method according to claim 5, wherein after the determination of the first cell, the method further comprises:
judging whether a second cell and a third cell exist or not; wherein the second cell is a cell in the monitoring set; the third cell is a cell in the active set; and the signal strength of the second cell is greater than the signal strength of the third cell;
if the second cell and the third cell exist, the updating indication comprises adding the second cell to the active set and deleting the third cell from the active set.
7. A directional handover method according to claim 5, wherein after the first network device determines whether the number of cells in the active set is equal to a preset number, the method further comprises:
if the number of the cells in the active set is smaller than the preset value and the signal strengths of the cells in the active set are smaller than a preset threshold value, the update indication includes adding a fourth cell to the active set, where the fourth cell is a cell with the strongest signal strength in the monitoring set.
8. A directional switching apparatus, characterized in that the apparatus comprises:
the receiving module is used for acquiring the motion direction of the terminal;
a processing module, configured to determine multiple neighboring cells of a primary serving cell in the moving direction; determining an active set and a monitoring set from the plurality of neighboring cells, and establishing connection with cells in the active set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength meets a preset condition in the adjacent cell, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by a terminal but the signal strength does not meet the preset condition in the adjacent cell;
a sending module, configured to report a handover event to a first network device; the handover event comprises a signal strength of the primary serving cell, a signal strength of a cell in the active set, and a signal strength of a cell in the monitor set;
the processing module is further configured to execute an update instruction determined by the first network device according to the handover event; establishing connection with the updated main service cell and/or the updated cells in the active set; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set.
9. The directional switching device according to claim 8, further comprising:
the sending module is further configured to send a motion parameter to a second network device, where the motion parameter includes a location area code LAC, a cell identifier CI, and a time interval TS of a main serving cell that the terminal has connected in a preset period; the LAC and the CI are used for determining the position of the terminal, and the TS is used for determining the time of the terminal at different positions;
the receiving module is further configured to obtain a terminal movement direction determined by the second network device according to the movement parameter.
10. The directional switch apparatus of claim 8, wherein the receiving module is further configured to obtain a neighbor list; the neighbor cell list is a cell list which is stored in the main service cell in advance in the moving direction, and the neighbor cell list comprises at least one neighbor cell; and the terminal determines a plurality of adjacent cells of the main service cell in the motion direction.
11. A directional switching apparatus, characterized in that the apparatus comprises:
the receiving module is used for receiving the switching event reported by the terminal; the switching event comprises the signal intensity of a main service cell, the signal intensity of a cell in an active set and the signal intensity of a cell in a monitoring set; the main service cell is a cell for the terminal to establish connection and perform data transmission currently; the active set is a set formed by at least one cell of which the signal strength in the adjacent cell of the main service cell in the terminal motion direction meets a preset condition, and the monitoring set is a set formed by at least one cell of which the signal strength can be measured by the terminal but the signal strength does not meet the preset condition in the adjacent cell;
a processing module for determining an update indication according to the handover event; wherein the update indication is to update at least one of: the primary serving cell, the active set, and the monitoring set;
and the sending module is used for sending the updating indication to the terminal.
12. The directional switch device of claim 11, wherein said processing module is further configured to:
judging whether the number of the cells in the active set is equal to a preset value or not; the preset value is the maximum value of the number of cells in the preset active set;
if the number of the cells in the active set is equal to the preset value, determining a first cell, wherein the first cell is a cell with the best signal strength in the active set and the monitoring set;
if the signal strength of the primary serving cell is less than the signal strength of the first cell, the update indication comprises replacing the primary serving cell with the first cell;
if the number of the cells in the active set is smaller than the preset value and the signal strengths of the cells in the active set are smaller than a preset threshold value, the update indication includes adding a fourth cell to the active set, where the fourth cell is a cell with the strongest signal strength in the monitoring set.
13. The directional switch device of claim 12, wherein the processing module is further configured to:
judging whether a second cell and a third cell exist or not; wherein the second cell is a cell in the monitoring set; the third cell is a cell in the active set; and the signal strength of the second cell is greater than the signal strength of the third cell;
if the second cell and the third cell exist, the updating indication comprises adding the second cell to the active set and deleting the third cell from the active set.
14. A computer-readable storage medium having stored therein instructions which, when executed by a computer, cause the computer to perform the method of directional handover as claimed in any one of claims 1 to 7.
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| CN110493832B (en) * | 2019-04-26 | 2022-03-29 | 华为技术有限公司 | Intelligent switching method and device |
| EP3965463A1 (en) * | 2019-05-02 | 2022-03-09 | Ntt Docomo, Inc. | User device and communication method |
| CN112020110B (en) * | 2019-05-31 | 2022-10-04 | 华为技术有限公司 | Network access method and device of terminal equipment |
| CN112888034B (en) * | 2019-11-29 | 2023-06-30 | 中国移动通信集团山东有限公司 | Directional switching method, device, storage medium and base station |
| CN112888045B (en) * | 2019-11-30 | 2022-11-25 | 华为技术有限公司 | Cell measurement method, cell measurement device, terminal equipment, chip and storage medium |
| CN112449392B (en) * | 2020-12-07 | 2022-09-13 | 中国联合网络通信集团有限公司 | Switching method and related device for service base station of terminal equipment |
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