CN111800834B - Cell switching method, device, equipment and medium - Google Patents
Cell switching method, device, equipment and medium Download PDFInfo
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- CN111800834B CN111800834B CN201910745786.2A CN201910745786A CN111800834B CN 111800834 B CN111800834 B CN 111800834B CN 201910745786 A CN201910745786 A CN 201910745786A CN 111800834 B CN111800834 B CN 111800834B
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The embodiment of the invention discloses a cell switching method, a cell switching device, cell switching equipment and a cell switching medium. The method comprises the following steps: receiving N switching commands sent by network side equipment; each of the N switching commands comprises a cell identifier of a cell, and N is a natural number not less than 1; if the terminal equipment fails in switching or wireless link, switching to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells. According to the cell switching method, the device, the equipment and the medium, when the terminal equipment fails to send the cell switching or the radio link fails, the cell switching is carried out, interruption of data transmission between the terminal equipment and the network can be avoided, and loss of service data packets of the terminal equipment is avoided.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell handover method, apparatus, device, and medium.
Background
A cell handover failure or radio link failure (Radio Link Failure, RLF) situation may occur for the terminal device when communicating. When the terminal device fails a cell handover or RLF situation, the terminal device can only perform radio resource control (Radio Resource Control, RRC) connection reestablishment. However, in the RRC connection reestablishment process, the terminal device cannot perform data transmission with the network, that is, the data transmission between the terminal device and the network is interrupted, so that the service data packet of the terminal device is lost.
Disclosure of Invention
The embodiment of the invention provides a cell switching method, a cell switching device and a cell switching medium, which can avoid interruption of data transmission between terminal equipment and a network and avoid loss of service data packets of the terminal equipment.
In a first aspect, an embodiment of the present invention provides a cell handover method, including:
receiving N switching commands sent by network side equipment; each of the N switching commands comprises a cell identifier of a cell, and N is a natural number not less than 1;
if the terminal equipment fails in switching or wireless link, switching to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In a second aspect, an embodiment of the present invention provides a cell handover method, including:
n switching commands are sent to the terminal equipment; each of the N switching commands comprises a cell identifier of a cell, wherein N is a natural number not less than 1, so that when the terminal equipment fails in cell switching or radio link switching, the terminal equipment is switched to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In a third aspect, an embodiment of the present invention provides a cell switching apparatus, including:
the receiving module is used for receiving N switching commands sent by the network side equipment; each of the N switching commands comprises a cell identifier of a cell, and N is a natural number not less than 1;
the switching module is used for switching to an alternative switching target cell if the terminal equipment fails to switch or fails to radio link; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In a fourth aspect, an embodiment of the present invention provides a cell switching apparatus, including:
the sending module is used for sending N switching commands to the terminal equipment; each of the N switching commands comprises a cell identifier of a cell, wherein N is a natural number not less than 1, so that when the terminal equipment fails in cell switching or radio link switching, the terminal equipment is switched to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In a fifth aspect, an embodiment of the present invention provides a terminal device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor;
The processor implements the cell handover method provided in the first aspect of the embodiment of the present invention when executing the computer program.
In a sixth aspect, an embodiment of the present invention provides a network side device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor;
the processor implements the cell handover method provided in the second aspect of the embodiment of the present invention when executing the computer program.
In a seventh aspect, an embodiment of the present invention provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements the cell handover method provided in the first aspect of the embodiment of the present invention or implements the cell handover method provided in the second aspect of the embodiment of the present invention.
According to the cell switching method, the device, the equipment and the medium, when the terminal equipment fails to send the cell switching or the radio link fails, the cell switching is carried out, interruption of data transmission between the terminal equipment and the network can be avoided, and loss of service data packets of the terminal equipment is avoided.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a cell handover method applied to a terminal device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell switching device applied to a terminal device according to an embodiment of the present invention;
fig. 3 shows a schematic hardware structure of a terminal device according to an embodiment of the present invention;
fig. 4 shows a schematic hardware structure of a network side device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the problems in the prior art, the embodiment of the invention provides a cell switching method, a device, equipment and a medium. The following first describes a cell handover method provided by an embodiment of the present invention.
Fig. 1 shows a flowchart of a cell handover method applied to a terminal device according to an embodiment of the present invention. The cell switching method applied to the terminal device may include:
S101: and receiving N switching commands sent by the network side equipment.
Each of the N handover commands includes a cell identifier of a cell, where N is a natural number not less than 1.
S102: if the terminal equipment fails to switch or fails to radio link, switching to an alternative switching target cell.
Wherein the candidate switching target cell is one of the candidate switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In one embodiment of the present invention, the network side device may send N handover commands to the terminal device through M radio resource control (Radio Resource Control, RRC) messages. That is, the network side device may send M RRC messages to the terminal device, where the M RRC messages include N handover commands. M is not greater than N.
The network side device provided in the embodiment of the present invention may be a base station, which may be a base station commonly used, an evolved node b (evolved node base station, eNB), or a network side device in a 5G system (e.g., a next generation base station (next generation node base station, gNB) or a network side device in a subsequent evolved communication system.
For example, it is assumed that a handover command sent by the network side device is received, where the handover command includes a cell identifier of the cell 1. And cell 1 is an alternative handover cell. If the terminal equipment fails in cell handover or radio link, the terminal equipment will execute the cell selection process, and if the terminal equipment selects cell 1, the terminal equipment executes the handover command corresponding to cell 1 and switches to cell 1. It can be appreciated that at this time, cell 1 is the candidate handover target cell.
Further exemplary, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of a cell 1; the handover command 2 includes a cell identifier of the cell 2; the handover command 3 includes a cell identifier of the cell 3. Cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell. If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
According to the cell switching method provided by the embodiment of the invention, when the terminal equipment fails to send the cell switching or the radio link fails, the cell switching is carried out, so that interruption of data transmission between the terminal equipment and the network can be avoided, and loss of service data packets of the terminal equipment can be avoided.
In an embodiment of the present invention, each handover command may further include a trigger event identification field, where the trigger event identification field may be a first identification field value or a non-first identification field value, where the first identification field value is used to indicate that a cell corresponding to the cell identification is an alternative handover cell, and the non-first identification field value is used to indicate that a cell corresponding to the cell identification is a non-alternative handover cell.
The triggering event identification domain is used for indicating a condition for triggering and executing a switching command, when the triggering event identification domain is a first identification domain, the terminal equipment only executes the switching command corresponding to the cell and switches to the cell when the terminal equipment selects the corresponding alternative switching cell after switching failure or radio link failure and executing a cell selection process; when the trigger event identification domain is not the first identification domain, after the condition indicated by the trigger event identification domain is met or the event is triggered, the terminal equipment executes a switching command corresponding to the condition and switches to a cell corresponding to the command.
For example, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a triggering event identifier domain, wherein the value of the triggering event identifier domain is the value of the first identifier domain; the switching command 2 comprises a cell identifier of the cell 2 and a triggering event identifier domain, wherein the value of the triggering event identifier domain is the value of the first identifier domain; the handover command 3 includes a cell identifier of the cell 3 and a trigger event identifier field, where the value of the trigger event identifier field is a value other than the first identifier field.
It will be appreciated that cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the present invention, the first identification field value may be zero.
In one embodiment of the invention, the first identification field value may be specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the trigger event identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
For example, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a triggering event identifier field; the handover command 2 includes a cell identity of the cell 2 and includes a trigger event identity field; the handover command 3 includes the cell identity of cell 3 and does not include the trigger event identity field.
It can be appreciated that cell 1 and cell 2 are non-alternative handover cells; cell 3 is an alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects a cell 3, the terminal equipment executes a handover command corresponding to the cell 3 and switches to the cell 3. It will be appreciated that at this point, cell 3 is the candidate handover target cell.
In an embodiment of the present invention, each handover command may further include a handover command type field, where the handover command type field may be a first type value or a non-first type value, where the first type value is used to indicate that a type of a cell corresponding to the cell identifier is an alternative handover cell, and the non-first type value is used to indicate that a cell corresponding to the cell identifier is a non-alternative handover cell.
For example, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a switching command type field, wherein the switching command type field takes a value of a first type; the switching command 2 comprises a cell identifier of the cell 2 and a switching command type field, and the value of the switching command type field is a first type value; the handover command 3 includes a cell identifier of the cell 3 and a handover command type field, and the handover command type field is a non-first type value.
It will be appreciated that cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the invention, the first type of value may be zero.
In one embodiment of the invention, the first type of value may be specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the handover command type field, the cell corresponding to the cell identifier is indicated as an alternative handover cell.
For example, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a switching command type field; the handover command 2 includes a cell identifier of the cell 2 and includes a handover command type field; the handover command 3 includes a cell identity of the cell 3 and does not include a handover command type field.
It will be appreciated that cell 1 and cell 2 are non-alternative handover cells and cell 3 is an alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects a cell 3, the terminal equipment executes a handover command corresponding to the cell 3 and switches to the cell 3. It will be appreciated that at this point, cell 3 is the candidate handover target cell.
In one embodiment of the present invention, each handover command may further include: configuration information of the cell. The configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and packet data convergence protocol (packet data convergence protocol, PDCP) configuration information. The cell switching method provided by the embodiment of the invention can further comprise the following steps: and configuring according to the configuration information of the alternative switching target cell.
For example, assume that three handover commands sent by the network side device are received, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and configuration information of the cell 1; the handover command 2 includes a cell identifier of the cell 2 and configuration information of the cell 2; the handover command 3 includes a cell identifier of the cell 3 and configuration information of the cell 3. Cell 1, cell 2 and cell 3 are all candidate handover cells.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, a handover command corresponding to cell 2 is executed, and the terminal equipment is switched to cell 2. In the process of executing the handover command corresponding to the cell 2, the terminal device performs configuration according to the configuration information of the cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the present invention, each handover command may further include: incremental configuration information of cells relative to source cells. The cell switching method provided by the embodiment of the invention can further comprise the following steps: and configuring according to the configuration information of the source cell and the incremental configuration information of the alternative switching target cell relative to the source cell.
It should be noted that, the source cell in the embodiment of the present invention refers to a cell in which the terminal device receives the N handover commands.
In an embodiment of the present invention, the cell handover method provided in the embodiment of the present invention may further include: and saving the configuration information of the source cell.
In one embodiment of the present invention, the terminal device may store the configuration information of the source cell before the source cell performs cell handover, and may also store the configuration information of the source cell when the N handover commands are received.
For example, assume that the terminal device is currently located in the source cell a, and at this time, three handover commands sent by the network side device are received, where the three handover commands are respectively a handover command 1, a handover command 2, and a handover command 3. The handover command 1 includes a cell identifier of the cell 1 and incremental configuration information X of the cell 1 relative to the source cell a; the handover command 2 includes a cell identifier of the cell 2 and incremental configuration information Y of the cell 2 relative to the source cell a; the handover command 3 includes the cell identity of the cell 3 and the incremental configuration information Z of the cell 3 with respect to the source cell a. Cell 1, cell 2 and cell 3 are all candidate handover cells.
When the terminal determines that handover (e.g., handover from cell a to cell 4) needs to be performed, the terminal device first saves the configuration information of the source cell a, and then performs the handover procedure. If the terminal equipment fails in cell switching, the terminal equipment executes the cell selection process again, and if the terminal equipment selects the cell 2, the terminal equipment firstly resumes using the stored configuration of the source cell A, then executes the switching command corresponding to the cell 2 and switches to the cell 2. In the process of executing the handover command corresponding to the cell 2, configuration is performed according to the configuration information of the source cell a and the incremental configuration information Y of the cell 2 relative to the cell a.
When the terminal determines that handover (e.g., handover from cell a to cell 4) needs to be performed, the terminal device first saves the configuration information of the source cell a, and then performs the handover procedure. If the terminal equipment fails in cell handover, the terminal equipment executes the cell selection process again, and if the terminal equipment selects the cell 2, the terminal equipment resumes the configuration of the stored source cell A, executes the handover command corresponding to the cell 2, switches to the cell 2, and if the terminal equipment also fails in handover to the cell 2, the terminal equipment executes the cell selection process at this time, and if the terminal equipment selects the cell 1, the terminal equipment resumes the configuration of the stored source cell A, executes the handover command corresponding to the cell 1, and switches to the cell 1. In the process of executing the handover command corresponding to cell 1, and configuring according to the configuration information of the source cell A and the incremental configuration information X of the cell 1 relative to the cell A.
When the terminal equipment fails in radio link, the terminal equipment executes the cell selection process, and supposing that the terminal equipment selects cell 2, the terminal equipment firstly stores the configuration information of the source cell A, then executes the switching command corresponding to cell 2 and switches to cell 2. In the process of executing the handover command corresponding to the cell 2, configuration is performed according to the configuration information of the source cell a and the incremental configuration information Y of the cell 2 relative to the cell a.
When the terminal equipment fails in radio link, the terminal equipment executes a cell selection process, and the terminal equipment firstly stores configuration information of a source cell A, then executes a switching command corresponding to the cell 2, switches to the cell 2, and if the terminal equipment fails in switching to the cell 2, the terminal equipment firstly executes the cell selection process, and if the terminal equipment selects the cell 1, the terminal equipment firstly resumes the stored configuration of the source cell A, then executes the switching command corresponding to the cell 1, and switches to the cell 1. In the process of executing the handover command corresponding to the cell 1, configuration is performed according to the configuration information of the source cell a and the incremental configuration information X of the cell 1 relative to the cell a.
In an embodiment of the present invention, the cell may be a current serving cell or a neighboring cell.
In one embodiment of the invention, the handover command may be deleted after the cell handover is completed.
The embodiment of the invention also provides a cell switching method applied to the network side equipment. The cell switching method applied to the network side equipment can comprise the following steps: n switching commands are sent to the terminal equipment; each of the N switching commands comprises a cell identifier of a cell, wherein N is a natural number not less than 1, so that when the terminal equipment fails in cell switching or radio link switching, the terminal equipment is switched to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
Illustratively, it is assumed that a handover command is sent to the terminal device, where the handover command includes the cell identity of cell 1. And cell 1 is an alternative handover cell. If the terminal equipment fails in cell handover or radio link, the terminal equipment will execute the cell selection process, and if the terminal equipment selects cell 1, the terminal equipment executes the handover command corresponding to cell 1 and switches to cell 1. It can be appreciated that at this time, cell 1 is the candidate handover target cell.
Further exemplary, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of a cell 1; the handover command 2 includes a cell identifier of the cell 2; the handover command 3 includes a cell identifier of the cell 3. Cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell. If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
According to the cell switching method provided by the embodiment of the invention, when the terminal equipment fails to send the cell switching or the radio link fails, the cell switching is carried out, so that interruption of data transmission between the terminal equipment and the network can be avoided, and loss of service data packets of the terminal equipment can be avoided.
In an embodiment of the present invention, each handover command may further include a trigger event identification field, where the trigger event identification field may be a first identification field value or a non-first identification field value, where the first identification field value is used to indicate that a cell corresponding to the cell identification is an alternative handover cell, and the non-first identification field value is used to indicate that a cell corresponding to the cell identification is a non-alternative handover cell.
For example, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a triggering event identifier domain, wherein the value of the triggering event identifier domain is the value of the first identifier domain; the switching command 2 comprises a cell identifier of the cell 2 and a triggering event identifier domain, wherein the value of the triggering event identifier domain is the value of the first identifier domain; the handover command 3 includes a cell identifier of the cell 3 and a trigger event identifier field, where the value of the trigger event identifier field is a value other than the first identifier field.
It will be appreciated that cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the present invention, the first identification field value may be zero.
In one embodiment of the invention, the first identification field value may be specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the trigger event identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
For example, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a triggering event identifier field; the handover command 2 includes a cell identity of the cell 2 and includes a trigger event identity field; the handover command 3 includes the cell identity of cell 3 and does not include the trigger event identity field.
It can be appreciated that cell 1 and cell 2 are non-alternative handover cells; cell 3 is an alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects a cell 3, the terminal equipment executes a handover command corresponding to the cell 3 and switches to the cell 3. It will be appreciated that at this point, cell 3 is the candidate handover target cell.
In an embodiment of the present invention, each handover command may further include a handover command type field, where the handover command type field may be a first type value or a non-first type value, where the first type value is used to indicate that a type of a cell corresponding to the cell identifier is an alternative handover cell, and the non-first type value is used to indicate that a cell corresponding to the cell identifier is a non-alternative handover cell.
For example, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a switching command type field, wherein the switching command type field takes a value of a first type; the switching command 2 comprises a cell identifier of the cell 2 and a switching command type field, and the value of the switching command type field is a first type value; the handover command 3 includes a cell identifier of the cell 3 and a handover command type field, and the handover command type field is a non-first type value.
It will be appreciated that cell 1 and cell 2 are alternative handover cells and cell 3 is a non-alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, the terminal equipment executes a handover command corresponding to cell 2 and switches to cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the invention, the first type of value may be zero.
In one embodiment of the invention, the first type of value may be specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the handover command type field, the cell corresponding to the cell identifier is indicated as an alternative handover cell.
For example, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and a switching command type field; the handover command 2 includes a cell identifier of the cell 2 and includes a handover command type field; the handover command 3 includes a cell identity of the cell 3 and does not include a handover command type field.
It will be appreciated that cell 1 and cell 2 are non-alternative handover cells and cell 3 is an alternative handover cell.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects a cell 3, the terminal equipment executes a handover command corresponding to the cell 3 and switches to the cell 3. It will be appreciated that at this point, cell 3 is the candidate handover target cell.
In one embodiment of the present invention, each handover command may further include: configuration information of the cell. The configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and PDCP configuration information.
For example, assume that three handover commands are sent to the terminal device, handover command 1, handover command 2 and handover command 3, respectively. The switching command 1 comprises a cell identifier of the cell 1 and configuration information of the cell 1; the handover command 2 includes a cell identifier of the cell 2 and configuration information of the cell 2; the handover command 3 includes a cell identifier of the cell 3 and configuration information of the cell 3. Cell 1, cell 2 and cell 3 are all candidate handover cells.
If the terminal equipment fails in cell handover or radio link, the terminal equipment executes a cell selection process, and if the terminal equipment selects cell 2, a handover command corresponding to cell 2 is executed, and the terminal equipment is switched to cell 2. In the process of executing the handover command corresponding to the cell 2, the terminal device performs configuration according to the configuration information of the cell 2. It can be appreciated that at this time, cell 2 is the candidate handover target cell.
In one embodiment of the present invention, each handover command may further include: incremental configuration information of cells relative to source cells.
For example, assume that the terminal device is currently located in the source cell a, and at this time, three handover commands are sent to the terminal device, where the three handover commands are handover command 1, handover command 2, and handover command 3, respectively. The handover command 1 includes a cell identifier of the cell 1 and incremental configuration information X of the cell 1 relative to the source cell a; the handover command 2 includes a cell identifier of the cell 2 and incremental configuration information Y of the cell 2 relative to the source cell a; the handover command 3 includes the cell identity of the cell 3 and the incremental configuration information Z of the cell 3 with respect to the source cell a. Cell 1, cell 2 and cell 3 are all candidate handover cells.
When the terminal determines that handover (e.g., handover from cell a to cell 4) needs to be performed, the terminal device first saves the configuration information of the source cell a, and then performs the handover procedure. If the terminal equipment fails in cell switching, the terminal equipment executes the cell selection process again, and if the terminal equipment selects the cell 2, the terminal equipment firstly resumes using the stored configuration of the source cell A, then executes the switching command corresponding to the cell 2 and switches to the cell 2. In the process of executing the handover command corresponding to the cell 2, configuration is performed according to the configuration information of the source cell a and the incremental configuration information Y of the cell 2 relative to the cell a.
When the terminal determines that handover (e.g., handover from cell a to cell 4) needs to be performed, the terminal device first saves the configuration information of the source cell a, and then performs the handover procedure. If the terminal equipment fails in cell handover, the terminal equipment executes the cell selection process again, and if the terminal equipment selects the cell 2, the terminal equipment resumes the configuration of the stored source cell A, executes the handover command corresponding to the cell 2, switches to the cell 2, and if the terminal equipment also fails in handover to the cell 2, the terminal equipment executes the cell selection process at this time, and if the terminal equipment selects the cell 1, the terminal equipment resumes the configuration of the stored source cell A, executes the handover command corresponding to the cell 1, and switches to the cell 1. In the process of executing the handover command corresponding to the cell 1, configuration is performed according to the configuration information of the source cell a and the incremental configuration information X of the cell 1 relative to the cell a.
When the terminal equipment fails in radio link, the terminal equipment executes the cell selection process, and supposing that the terminal equipment selects cell 2, the terminal equipment firstly stores the configuration information of the source cell A, then executes the switching command corresponding to cell 2 and switches to cell 2. In the process of executing the handover command corresponding to the cell 2, configuration is performed according to the configuration information of the source cell a and the incremental configuration information Y of the cell 2 relative to the cell a.
When the terminal equipment fails in radio link, the terminal equipment executes a cell selection process, and the terminal equipment firstly stores configuration information of a source cell A, then executes a switching command corresponding to the cell 2, switches to the cell 2, and if the terminal equipment fails in switching to the cell 2, the terminal equipment firstly executes the cell selection process, and if the terminal equipment selects the cell 1, the terminal equipment firstly resumes the stored configuration of the source cell A, then executes the switching command corresponding to the cell 1, and switches to the cell 1. In the process of executing the handover command corresponding to the cell 1, configuration is performed according to the configuration information of the source cell a and the incremental configuration information X of the cell 1 relative to the cell a.
In an embodiment of the present invention, the cell may be a current serving cell or a neighboring cell.
Corresponding to the above method embodiment, the embodiment of the present invention also provides a cell switching device applied to the terminal device. As shown in fig. 2, fig. 2 shows a schematic structural diagram of a cell switching device applied to a terminal device according to an embodiment of the present invention. The cell switching apparatus applied to the terminal device may include:
and the receiving module 201 is configured to receive N switching commands sent by the network side device.
Each of the N handover commands includes a cell identifier of a cell, where N is a natural number not less than 1.
A switching module 202, configured to switch to an alternative handover target cell if a handover failure or a radio link failure occurs in the terminal device.
Wherein the candidate switching target cell is one of the candidate switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In one embodiment of the present invention, each handover command further includes a trigger event identification field, and if the value of the trigger event identification field is the value of the first identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
In one embodiment of the invention, the first identification field value is specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the trigger event identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
In one embodiment of the present invention, each handover command further includes a handover command type field, and if the handover command type field is the first type value, the cell identity is indicated to correspond to the cell alternative handover cell.
In one embodiment of the invention, the first type of value is specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the handover command type field, the cell corresponding to the cell identifier is indicated as an alternative handover cell.
In one embodiment of the present invention, each handover command may further include: configuration information of the cell; the configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and packet data convergence protocol configuration information.
The cell switching device applied to the terminal equipment provided by the embodiment of the invention can further comprise:
and the configuration module is used for carrying out configuration according to the configuration information of the alternative switching target cell.
In one embodiment of the present invention, each handover command may further include: incremental configuration information of cells relative to source cells.
The cell switching device applied to the terminal equipment provided by the embodiment of the invention can further comprise:
the configuration module is used for configuring according to the configuration information of the source cell and the incremental configuration information of the alternative switching target cell relative to the source cell.
In an embodiment of the present invention, the cell switching apparatus applied to a terminal device provided in the embodiment of the present invention may further include:
the storage module is used for storing the configuration information of the source cell before the source cell performs cell switching; or, when receiving the N switching commands, saving the configuration information of the source cell.
In one embodiment of the present invention, the alternative handover cell may include:
the current serving cell and/or neighbor cell.
In an embodiment of the present invention, the cell switching apparatus applied to a terminal device provided in the embodiment of the present invention may further include:
and the deleting module is used for deleting the switching command.
The embodiment of the invention also provides a cell switching device applied to the network side equipment. The cell switching apparatus applied to the network side device may include:
the sending module is used for sending N switching commands to the terminal equipment; each of the N switching commands comprises a cell identifier of a cell, wherein N is a natural number not less than 1, so that when the terminal equipment fails in cell switching or radio link switching, the terminal equipment is switched to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
In one embodiment of the present invention, each handover command further includes a trigger event identification field, and if the value of the trigger event identification field is the value of the first identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
In one embodiment of the invention, the first identification field value is specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the trigger event identification field, the cell corresponding to the cell identification is indicated to be an alternative handover cell.
In one embodiment of the present invention, each handover command further includes a handover command type field, and if the handover command type field is the first type value, the cell identity is indicated to correspond to the cell alternative handover cell.
In one embodiment of the invention, the first type of value is specified by a protocol.
In one embodiment of the present invention, if the handover command does not include the handover command type field, the cell corresponding to the cell identifier is indicated as an alternative handover cell.
In one embodiment of the present invention, each handover command may further include:
configuration information of the cell; the configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and packet data convergence protocol configuration information.
In one embodiment of the present invention, each handover command may further include: incremental configuration information of cells relative to source cells.
In one embodiment of the present invention, the alternative handover cell may include:
the current serving cell and/or neighbor cell.
Fig. 3 shows a schematic hardware structure of a terminal device according to an embodiment of the present invention. The terminal device 300 includes, but is not limited to: radio frequency unit 301, network module 302, audio output unit 303, input unit 304, sensor 305, display unit 306, user input unit 307, interface unit 308, memory 309, processor 310, and power supply 311. It will be appreciated by those skilled in the art that the terminal device structure shown in fig. 3 does not constitute a limitation of the terminal device, and the terminal device may comprise more or less components than shown, or may combine certain components, or may have a different arrangement of components. In the embodiment of the invention, the terminal equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.
The processor 310 may be configured to: if the terminal equipment fails to switch or fails to radio link, switching to an alternative switching target cell.
Each of the N switching commands comprises a cell identifier of a cell, N is a natural number not less than 1, and the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells.
By the embodiment of the invention, when the terminal equipment fails to send the cell switching or the radio link fails, the cell switching is carried out, so that interruption of data transmission between the terminal equipment and the network can be avoided, and loss of service data packets of the terminal equipment can be avoided.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 301 may be used to receive and send information or signals during a call, specifically, receive downlink data from a base station, and then process the downlink data with the processor 310; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 301 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 301 may also communicate with networks and other devices through a wireless communication system.
The terminal device provides wireless broadband internet access to the user through the network module 302, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.
The audio output unit 303 may convert audio data received by the radio frequency unit 301 or the network module 302 or stored in the memory 309 into an audio signal and output as sound. Also, the audio output unit 303 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal device 300. The audio output unit 303 includes a speaker, a buzzer, a receiver, and the like.
The input unit 304 is used to receive an audio or video signal. The input unit 304 may include a graphics processor (Graphics Processing Unit, GPU) 3041 and a microphone 3042, the graphics processor 3041 processing image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 306. The image frames processed by the graphics processor 3041 may be stored in the memory 309 (or other storage medium) or transmitted via the radio frequency unit 301 or the network module 302. The microphone 3042 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 301 in the case of a telephone call mode.
The terminal device 300 further comprises at least one sensor 305, such as a light sensor, a motion sensor and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 3061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 3061 and/or the backlight when the terminal device 300 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking) and the like of the terminal equipment; the sensor 305 may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.
The display unit 306 is used to display information input by a user or information provided to the user. The display unit 306 may include a display panel 3061, and the display panel 3061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 307 is operable to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 307 includes a touch panel 3071 and other input devices 3072. The touch panel 3071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 3071 or thereabout the touch panel 3071 using any suitable object or accessory such as a finger, stylus, or the like). The touch panel 3071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 310, and receives and executes commands sent by the processor 310. In addition, the touch panel 3071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 307 may include other input devices 3072 in addition to the touch panel 3071. Specifically, other input devices 3072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 3071 may be overlaid on the display panel 3061, and when the touch panel 3071 detects a touch operation thereon or thereabout, the touch operation is transmitted to the processor 310 to determine a type of touch event, and then the processor 310 provides a corresponding visual output on the display panel 3061 according to the type of touch event. Although in fig. 2, the touch panel 3071 and the display panel 3061 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 3071 and the display panel 3061 may be integrated to implement the input and output functions of the terminal device, which is not limited herein.
The interface unit 308 is an interface to which an external device is connected to the terminal apparatus 300. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 308 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 300 or may be used to transmit data between the terminal apparatus 300 and an external device.
The processor 310 is a control center of the terminal device, connects various parts of the entire terminal device using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 309 and calling data stored in the memory 309, thereby performing overall monitoring of the terminal device. Processor 310 may include one or more processing units; preferably, the processor 310 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 310.
The terminal device 300 may further include a power source 311 (e.g., a battery) for powering the various components, and preferably the power source 311 may be logically coupled to the processor 310 via a power management system that performs functions such as managing charging, discharging, and power consumption.
In addition, the terminal device 300 includes some functional modules, which are not shown, and will not be described herein.
Preferably, the embodiment of the present invention further provides a terminal device, including a processor 310, a memory 309, and a computer program stored in the memory 309 and capable of running on the processor 310, where the computer program when executed by the processor 310 implements each process of the embodiment of the cell handover method applied to the terminal device, and the process can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Fig. 4 shows a schematic hardware structure of a network side device according to an embodiment of the present invention. The network side device includes: memory 401, processor 402, transceiver 403, and a computer program stored on memory 401 and executable on processor 402.
The transceiver 403 may be used to: and sending N switching commands to the terminal equipment so as to switch to the alternative switching target cell when the terminal equipment fails in cell switching or radio link switching.
Each of the N switching commands comprises a cell identifier of a cell, N is a natural number not smaller than 1, the candidate switching target cell is one of the candidate switching cells, and N cells corresponding to the N cell identifiers comprise the candidate switching cells.
Where in FIG. 4, a bus architecture may comprise any number of interconnected buses and bridges, with one or more processors, represented in particular by processor 402, and various circuits of the memory, represented by memory 401, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 403 may be a number of elements, i.e. comprise a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium, for receiving and transmitting data under the control of the processor 402. The processor 402 is responsible for managing the bus architecture and general processing, and the memory 401 may store data used by the processor 402 in performing operations.
Preferably, the embodiment of the present invention further provides a network side device, which includes a processor 402, a memory 401, and a computer program stored in the memory 401 and capable of running on the processor 402, where the computer program when executed by the processor 402 implements each process of the cell handover method embodiment applied to the network side device, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein.
Embodiments of the present invention also provide a computer readable storage medium having computer program instructions stored thereon; when the computer program instructions are executed by the processor, the procedures of the cell switching method embodiment applied to the terminal device or the procedures of the cell switching method embodiment applied to the network side device provided by the embodiment of the invention are implemented, and the same technical effects can be achieved, so that repetition is avoided, and the details are not repeated here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (21)
1. A method of cell handover, the method comprising:
receiving N switching commands sent by network side equipment; each of the N switching commands comprises a cell identifier of a cell, and N is a natural number not less than 1;
if the terminal equipment fails to switch, switching to an alternative switching target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells;
the alternative switching cell comprises a current serving cell and a neighbor cell.
2. The method of claim 1, wherein each handover command further includes a trigger event identification field, and if the trigger event identification field is the first identification field, indicating that the cell corresponding to the cell identification is an alternative handover cell.
3. The method of claim 1, wherein if the handover command does not include a trigger event identification field, indicating that the cell corresponding to the cell identification is an alternative handover cell.
4. The method of claim 1, wherein each handover command further includes a handover command type field, and if the handover command type field is the first type value, indicating the cell identifier corresponds to the cell candidate handover cell.
5. The method of claim 1, wherein if the handover command does not include a handover command type field, indicating the cell corresponding to the cell identifier is an alternative handover cell.
6. The method according to any one of claims 1 to 5, wherein each of the handover commands further includes:
configuration information of the cell;
the configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and packet data convergence protocol configuration information;
the method further comprises the steps of:
and configuring according to the configuration information of the alternative switching target cell.
7. The method according to any one of claims 1 to 5, wherein each of the handover commands further includes:
incremental configuration information of a cell relative to a source cell;
the method further comprises the steps of:
and configuring according to the configuration information of the source cell and the incremental configuration information of the alternative switching target cell relative to the source cell.
8. The method of claim 7, wherein the method further comprises:
before the source cell performs cell switching, the configuration information of the source cell is stored; or alternatively, the first and second heat exchangers may be,
And when the N switching commands are received, the configuration information of the source cell is stored.
9. The method according to any of claims 1 to 5, characterized in that after the handover to the alternative handover target cell, the method further comprises:
and deleting the switching command.
10. A method of cell handover, the method comprising:
n switching commands are sent to the terminal equipment; each of the N handover commands includes a cell identifier of a cell, where N is a natural number not less than 1, so that when the terminal device fails to perform cell handover, the terminal device switches to an alternative handover target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells;
the alternative switching cell comprises a current serving cell and a neighbor cell.
11. The method of claim 10, wherein each handover command further includes a trigger event identification field, and if the trigger event identification field is the first identification field, indicating that the cell corresponding to the cell identification is an alternative handover cell.
12. The method of claim 10, wherein if the handover command does not include a trigger event identification field, indicating that the cell corresponding to the cell identification is an alternative handover cell.
13. The method of claim 10, wherein each handover command further includes a handover command type field, and if the handover command type field is the first type value, indicating the cell identifier corresponds to the cell candidate handover cell.
14. The method of claim 10, wherein if the handover command does not include a handover command type field, indicating the cell corresponding to the cell identifier is an alternative handover cell.
15. The method according to any one of claims 10 to 14, wherein each handover command further comprises:
configuration information of the cell;
the configuration information includes at least one of the following: measurement configuration information, bearer configuration information, security configuration information, and packet data convergence protocol configuration information.
16. The method according to any one of claims 10 to 14, wherein each handover command further comprises:
incremental configuration information of cells relative to source cells.
17. A cell switching apparatus, the apparatus comprising:
the receiving module is used for receiving N switching commands sent by the network side equipment; each of the N switching commands comprises a cell identifier of a cell, and N is a natural number not less than 1;
The switching module is used for switching to the alternative switching target cell if the terminal equipment fails to switch; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells;
the alternative switching cell comprises a current serving cell and a neighbor cell.
18. A cell switching apparatus, the apparatus comprising:
the sending module is used for sending N switching commands to the terminal equipment; each of the N handover commands includes a cell identifier of a cell, where N is a natural number not less than 1, so that when the terminal device fails to perform cell handover, the terminal device switches to an alternative handover target cell; the alternative switching target cell is one of the alternative switching cells; n cells corresponding to the N cell identifications comprise alternative switching cells;
the alternative switching cell comprises a current serving cell and a neighbor cell.
19. A terminal device, characterized in that the terminal device comprises: a memory, a processor, and a computer program stored on the memory and executable on the processor;
the processor, when executing the computer program, implements a cell handover method as claimed in any one of claims 1 to 9.
20. A network side device, characterized in that the network side device comprises: a memory, a processor, and a computer program stored on the memory and executable on the processor;
the processor, when executing the computer program, implements a cell handover method as claimed in any one of claims 10 to 16.
21. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the cell handover method according to any of claims 1 to 9 or implements the cell handover method according to any of claims 10 to 16.
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