CN111586773A - Switching method, device and communication equipment - Google Patents
Switching method, device and communication equipment Download PDFInfo
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- CN111586773A CN111586773A CN201910124299.4A CN201910124299A CN111586773A CN 111586773 A CN111586773 A CN 111586773A CN 201910124299 A CN201910124299 A CN 201910124299A CN 111586773 A CN111586773 A CN 111586773A
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- 238000000034 method Methods 0.000 title claims abstract description 96
- 238000004891 communication Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 30
- 230000003993 interaction Effects 0.000 claims description 27
- 230000011664 signaling Effects 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000004590 computer program Methods 0.000 claims description 18
- 230000001960 triggered effect Effects 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 12
- 238000012790 confirmation Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
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- 238000005516 engineering process Methods 0.000 description 3
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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Abstract
The invention provides a switching method, a switching device and communication equipment, and belongs to the field of wireless communication. A switching method is applied to a source base station and comprises the following steps: sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a condition switching configuration; and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station. By the technical scheme, the problem of data forwarding in the condition switching process can be solved, so that the switching process is more robust, and new service requirements and deployment scenes can be supported.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a handover method, a handover apparatus, and a communication device.
Background
Handover (HO) is a key technology for supporting a terminal to ensure service continuity when the terminal moves from one cell to another cell or from one base station to another base station in a connected state, and generally, a Handover process is completed through three stages of Handover preparation, Handover execution and Handover completion.
The handover procedure is terminal assisted, such as providing measurement results to the base station, but the decision of handover is network controlled, and usually the base station initiates a handover preparation inter-base station interaction procedure when determining that the terminal needs to be handed over to another base station according to the measurement results of the base station.
The existing handover methods have some disadvantages. For example, the handover decision is determined by the base station, and the base station starts to interact with the target base station and negotiate the configuration of resources after determining to perform a handover operation according to the measurement result of the terminal, so that the terminal loses the connection with the same base station due to too fast moving speed of the terminal or too fast reduction of the quality of an air interface signal caused by fading, thereby bringing about a problem of poor user experience.
One proposed optimization technology is Conditional HO, which is mainly characterized in that a serving base station negotiates with a target base station in advance, prepares relevant resources and configuration information in advance, sends the information to a terminal in advance, and the terminal makes a decision of triggering handover.
In order to ensure the lossless data in the handover process, the source base station needs to forward the data, that is, send the data to the target base station, in addition to sending the data to the terminal. However, in the case of the conditional handover, there is no relevant provision for when the source base station forwards data. Therefore, when the source base station forwards data to the target base station and the corresponding flow are key issues that remain to be solved for conditional handover.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a switching method, a switching device and a communication device, which can solve the problem of data forwarding in a conditional switching process, make the switching process more robust, and support new service requirements and deployment scenarios.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
the embodiment of the invention provides a switching method, which is applied to a source base station and comprises the following steps:
sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a condition switching configuration;
and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
the forwarding data to a target base station and/or sending SN number state information to the target base station under the condition of meeting a preset data forwarding condition comprises the following steps:
forwarding the transmitted data to a target base station while transmitting the data to the terminal;
and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the forwarding data to a target base station and/or sending SN number state information to the target base station under the condition of meeting a preset data forwarding condition comprises the following steps:
receiving indication information which is sent by the terminal and triggers condition switching, wherein the indication information indicates that the terminal starts to establish connection with a target base station or stops data interaction with a source base station;
forwarding data to a target base station and/or sending SN number state information to the target base station.
Further, the air conditioner is provided with a fan,
and the indication information which is sent by the terminal and has triggered the condition switching is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the forwarding data to a target base station and/or sending SN number state information to the target base station under the condition of meeting a preset data forwarding condition comprises the following steps:
and under the condition of judging that the terminal triggers condition switching, forwarding data to a target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the forwarding data to a target base station and/or sending SN number state information to the target base station under the condition of meeting a preset data forwarding condition comprises the following steps:
after receiving a condition switching completion message or data forwarding indication message sent by a target base station or a message that a terminal successfully accesses the target base station, forwarding data to the target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
further comprising:
receiving an end mark sent by a core network element, wherein the end mark is sent after the core network element receives a path switching request of the target base station and completes path switching;
sending the end mark to the target base station;
and receiving a terminal context release message of the target base station.
The embodiment of the invention also provides a switching device, which is applied to the source base station and comprises a processor and a transceiver,
the transceiver is used for sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a conditional switching configuration; and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
the transceiver is specifically configured to forward the transmitted data to a target base station while transmitting the data to the terminal; and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the transceiver is specifically configured to receive indication information that a condition handover has been triggered and is sent by the terminal, where the indication information indicates that the terminal has started to establish a connection with a target base station or that the terminal has stopped data interaction with a source base station; forwarding data to a target base station and/or sending SN number state information to the target base station.
Further, the air conditioner is provided with a fan,
and the indication information which is sent by the terminal and has triggered the condition switching is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the transceiver is specifically configured to forward data to a target base station and/or send SN status information to the target base station when it is determined that the terminal has triggered the conditional handover.
Further, the air conditioner is provided with a fan,
the transceiver is specifically configured to forward data to the target base station and/or send SN status information to the target base station after receiving a conditional handover complete message or data forwarding indication message sent by the target base station or a message that the terminal successfully accesses the target base station.
Further, the air conditioner is provided with a fan,
the transceiver is further configured to receive an end flag sent by a core network element, where the end flag is sent after the core network element receives a path switching request of the target base station and completes path switching; sending the end mark to the target base station; and receiving a terminal context release message of the target base station.
The embodiment of the invention also provides a switching method, which is applied to a terminal and comprises the following steps:
receiving an RRC connection reconfiguration message sent by a source base station, wherein the RRC connection reconfiguration message comprises a condition switching configuration;
and under the condition of meeting the switching condition of the condition switching, sending indication information to the source base station, wherein the indication information indicates that the terminal starts to establish connection with the target base station or stops data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
further comprising:
stopping data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the indication information is used for indicating the source base station to forward data to the target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the method further comprises the following steps:
and sending a Radio Resource Control (RRC) reconfiguration completion message to the target base station.
The embodiment of the invention also provides a switching device, which is applied to a terminal and comprises a processor and a transceiver,
the transceiver is configured to receive an RRC connection reconfiguration message sent by a source base station, where the RRC connection reconfiguration message includes a conditional handover configuration;
the processor is used for sending indication information to the source base station under the condition that a switching condition of condition switching is met, wherein the indication information indicates that the terminal starts to establish connection with the target base station or the terminal stops data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
the transceiver is further configured to cease data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the indication information is used for indicating the source base station to forward data to the target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the transceiver is further configured to send a radio resource control, RRC, reconfiguration complete message to the target base station.
The embodiment of the invention also provides a switching method, which is applied to a target base station and comprises the following steps:
receiving a Radio Resource Control (RRC) reconfiguration completion message or random access preamble information or scheduling transmission information sent by a terminal;
and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
Further, the air conditioner is provided with a fan,
further comprising:
and receiving the data forwarded by the source base station and/or receiving SN (service number) state information of the source base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
further comprising:
sending a path switching request to a core network element;
and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
Further, the air conditioner is provided with a fan,
before the receiving the data forwarded by the source base station and/or receiving the SN number status information of the source base station, the method further includes:
receiving a Radio Resource Control (RRC) reconfiguration completion message sent by a terminal or receiving random access preamble information or scheduling transmission information;
and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
The embodiment of the invention also provides a switching device, which is applied to the target base station and comprises a processor and a transceiver,
the transceiver is used for receiving a Radio Resource Control (RRC) reconfiguration completion message or random access preamble information or scheduling transmission information sent by a terminal; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
Further, the air conditioner is provided with a fan,
the transceiver is also used for receiving data forwarded by the source base station and unsuccessfully transmitted data and new data and/or receiving SN number status information of the source base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the transceiver is further configured to send a path switching request to a core network element; and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
Further, the air conditioner is provided with a fan,
the transceiver is also used for receiving a Radio Resource Control (RRC) reconfiguration completion message sent by the terminal or receiving random access preamble information or scheduling transmission information; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
An embodiment of the present invention further provides a communication device, including: memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the handover method as described above.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the handover method described above are implemented.
The invention has the following beneficial effects:
in the above scheme, the source base station sends an RRC connection reconfiguration message to the terminal, and forwards data to the target base station and/or sends SN status information to the target base station when a preset data forwarding condition is met. By the technical scheme, the problem of data forwarding in the conditional switching process can be solved, repeated transmission of data between the source base station and the target base station is effectively avoided, and meanwhile, the interruption time delay of terminal data is reduced, so that the switching process is more robust, and new service requirements and deployment scenes can be supported.
Drawings
FIG. 1 is a flowchart illustrating a handover method according to an embodiment of the present invention;
FIG. 2 is a block diagram of a switching device according to an embodiment of the present invention;
FIG. 3 is a second flowchart illustrating a handover method according to an embodiment of the present invention;
FIG. 4 is a second block diagram of a switching device according to the second embodiment of the present invention;
FIG. 5 is a third flowchart illustrating a handover method according to a third embodiment of the present invention;
FIG. 6 is a third block diagram of a switching device according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of signaling interaction between network elements according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating a second handover method according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a third handover method according to an embodiment of the present invention;
fig. 10 is a flowchart illustrating a fourth handover method according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Embodiments of the present invention provide a switching method, an apparatus, and a communication device, which can solve the problem of data forwarding in a conditional switching process, make the switching process more robust, and support new service requirements and deployment scenarios.
An embodiment of the present invention provides a handover method, applied to a source base station, as shown in fig. 1, including:
step 101: sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a condition switching configuration;
step 102: and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
In this embodiment, the source base station sends an RRC connection reconfiguration message to the terminal, and forwards data to the target base station and/or sends SN status information to the target base station when a preset data forwarding condition is satisfied. By the technical scheme, the problem of data forwarding in the conditional switching process can be solved, repeated transmission of data between the source base station and the target base station is effectively avoided, and meanwhile, the interruption time delay of terminal data is reduced, so that the switching process is more robust, and new service requirements and deployment scenes can be supported.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
In a specific embodiment, the forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is met includes:
forwarding the transmitted data to a target base station while transmitting the data to the terminal;
and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
In a specific embodiment, the forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is met includes:
receiving indication information which is sent by the terminal and triggers condition switching, wherein the indication information indicates that the terminal starts to establish connection with a target base station or stops data interaction with a source base station;
forwarding data to a target base station and/or sending SN number state information to the target base station.
In a specific embodiment, the indication information that the condition switching has been triggered and sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
In a specific embodiment, the forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is met includes:
and under the condition of judging that the terminal triggers condition switching, forwarding data to a target base station and/or sending SN (service number) state information to the target base station.
In a specific embodiment, the forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is met includes:
after receiving a condition switching completion message or data forwarding indication message sent by a target base station or a message that a terminal successfully accesses the target base station, forwarding data to the target base station and/or sending SN (service number) state information to the target base station.
Further, this embodiment further includes:
receiving an end mark sent by a core network element, wherein the end mark is sent after the core network element receives a path switching request of the target base station and completes path switching;
sending the end mark to the target base station;
and receiving a terminal context release message of the target base station.
The embodiment of the present invention further provides a switching apparatus, which is applied to a source base station, as shown in fig. 2, and includes a processor 11 and a transceiver 12,
the transceiver 12 is configured to send an RRC connection reconfiguration message to the terminal, where the RRC connection reconfiguration message includes a conditional handover configuration; and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
In this embodiment, the source base station sends an RRC connection reconfiguration message to the terminal; and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station. By the technical scheme, the problem of data forwarding in the conditional switching process can be solved, repeated transmission of data between the source base station and the target base station is effectively avoided, and meanwhile, the interruption time delay of terminal data is reduced, so that the switching process is more robust, and new service requirements and deployment scenes can be supported.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
the transceiver 12 is specifically configured to forward the transmitted data to a target base station while transmitting the data to the terminal; and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the transceiver 12 is specifically configured to receive indication information that a condition handover has been triggered and is sent by the terminal, where the indication information indicates that the terminal has started to establish a connection with a target base station or that the terminal has stopped data interaction with a source base station; forwarding data to a target base station and/or sending SN number state information to the target base station.
Further, the air conditioner is provided with a fan,
and the indication information which is sent by the terminal and has triggered the condition switching is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the transceiver 12 is specifically configured to forward data to a target base station and/or send SN status information to the target base station when it is determined that the terminal has triggered conditional handover.
Further, the air conditioner is provided with a fan,
the transceiver 12 is specifically configured to forward data to the target base station and/or send SN status information to the target base station after receiving a conditional handover complete message or data forwarding indication message sent by the target base station or a message that the terminal successfully accesses the target base station.
Further, the air conditioner is provided with a fan,
the transceiver 12 is further configured to receive an end flag sent by a core network element, where the end flag is sent after the core network element receives a path switching request of the target base station and completes path switching; sending the end mark to the target base station; and receiving a terminal context release message of the target base station.
An embodiment of the present invention further provides a handover method, applied to a terminal, as shown in fig. 3, including:
step 201: receiving a conditional handover indication sent by a source base station, wherein the RRC connection reconfiguration message comprises a conditional handover configuration;
step 202: and under the condition of meeting the switching condition of the condition switching, sending indication information to the source base station, wherein the indication information indicates that the terminal starts to establish connection with the target base station or stops data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
further comprising:
stopping data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the indication information is used for indicating the source base station to forward data to the target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the method further comprises the following steps:
and sending a Radio Resource Control (RRC) reconfiguration completion message to the target base station.
The embodiment of the present invention further provides a switching device, which is applied to a terminal, as shown in fig. 4, and includes a processor 21 and a transceiver 22,
the transceiver 22 is configured to receive an RRC connection reconfiguration message sent by a source base station, where the RRC connection reconfiguration message includes a conditional handover configuration;
the processor 21 is configured to send, to the source base station, indication information indicating that the terminal has started to establish a connection with the target base station or that the terminal has stopped data interaction with the source base station, when a handover condition of the conditional handover is satisfied.
Further, the air conditioner is provided with a fan,
the RRC connection reconfiguration message includes at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
Further, the air conditioner is provided with a fan,
the transceiver 22 is also used to stop data interaction with the source base station.
Further, the air conditioner is provided with a fan,
the indication information is used for indicating the source base station to forward data to the target base station and/or sending SN (service number) state information to the target base station.
Further, the air conditioner is provided with a fan,
the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
Further, the air conditioner is provided with a fan,
the transceiver 22 is further configured to send a radio resource control, RRC, reconfiguration complete message to the target base station.
An embodiment of the present invention further provides a handover method, applied to a target base station, as shown in fig. 5, including:
step 301: receiving a Radio Resource Control (RRC) reconfiguration completion message or random access preamble information or scheduling transmission information sent by a terminal;
step 302: and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
Further, the air conditioner is provided with a fan,
further comprising:
and receiving the data forwarded by the source base station and/or receiving SN (service number) state information of the source base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
further comprising:
sending a path switching request to a core network element;
and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
Further, the air conditioner is provided with a fan,
before the receiving the data forwarded by the source base station and/or receiving the SN number status information of the source base station, the method further includes:
receiving a Radio Resource Control (RRC) reconfiguration completion message sent by a terminal or receiving random access preamble information or scheduling transmission information;
and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
The embodiment of the present invention further provides a handover apparatus, which is applied to a target base station, as shown in fig. 6, and includes a processor 31 and a transceiver 32,
the transceiver 32 is configured to receive a radio resource control RRC reconfiguration complete message or random access preamble information or scheduling transmission information sent by a terminal; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
Further, the air conditioner is provided with a fan,
the transceiver 32 is further configured to receive data forwarded by the source base station for unsuccessful transmission and new data and/or receive SN status information of the source base station.
Further, the air conditioner is provided with a fan,
the data comprises data which is not successfully transmitted by the terminal confirmation and/or unsent data and/or new data received from the core network.
Further, the air conditioner is provided with a fan,
the transceiver 32 is further configured to send a path switching request to a core network element; and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
Further, the air conditioner is provided with a fan,
the transceiver 32 is further configured to receive a radio resource control RRC reconfiguration complete message sent by the terminal or receive random access preamble information or scheduling transmission information; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 7, the signaling interaction of each network element in this embodiment includes the following steps:
the source base station sends parameters for conditional HO measurement and reporting to the terminal, wherein the parameters are contained in RRC ConReconfig (radio resource configuration message), and receives configuration feedback message (RRC Con Reconfig Com);
when meeting the reporting condition of the conditional HO measurement event, the terminal reports the measurement result;
a source base station determines whether a conditional HO is configured for a certain UE, and selects a target cell;
the method comprises the steps that a handover request sent to a target base station by a source base station carries a conditional HO indication, the handover request is used for informing that the current handover request of the target base station is the conditional HO, and the target base station is assisted to carry out admission control and feed back corresponding parameters and configuration;
if the target base station accepts, the returned HO Request ACK carries handover command information, which includes information such as bearer configuration, RACH (Random Access Channel) configuration and the like, and may also include an indication of a conditional HO and/or a trigger condition of the conditional HO;
the source base station sends an RRC reconfiguration message to the terminal, and directly forwards an HO command message or increases an indication of a conditional HO and/or a trigger condition of the conditional HO, and then the executed data forwarding scheme may include the following several embodiments.
In the data forwarding scheme of the first embodiment, as shown in fig. 7, the source base station sends data to the terminal and simultaneously sends unsuccessfully transmitted data and new data to the target base station; the terminal meets the conditional HO condition to trigger the switching and complete the random access process; the source base station determines to stop sending/receiving data with the terminal, and sends SN (Service Node) state information to the target base station; the target base station sends a path switching request to a core network; after the path switching is completed, the core network sends an end marker to the source base station, and the source base station forwards the end marker to the target base station; and after receiving the feedback message of completing the path switching, the target base station sends a UE context release message to the source base station.
In the data forwarding scheme of the second embodiment, as shown in fig. 8, after receiving the reconfiguration message sent by the source base station, the terminal does not stop data transmission with the source base station, when the terminal determines that the conditional HO handover condition is satisfied, the terminal sends an indication that the HO request has been triggered to the source base station, and then the terminal initiates a random access process to the target base station, and the source base station can start to perform data forwarding to the target base station and/or send SN status information after receiving the indication.
In the data forwarding scheme of the third embodiment, as shown in fig. 9, after receiving the reconfiguration message sent by the source base station, the terminal does not stop data transmission with the source base station; the terminal then initiates a random access process to the target base station; the base station judges that the current terminal triggers conditional HO, for example, based on realization, data transmission is not successful within a certain time, and can start to execute data forwarding to a target base station and/or send SNstatus information.
In the data forwarding scheme of the fourth embodiment, as shown in fig. 10, after receiving the reconfiguration message sent by the source base station, the terminal does not stop data transmission with the source base station; the terminal then initiates a random access process to the target base station; when the target base station receives the RRC reconfiguration complete message sent by the terminal or receives the message 1/3, the target base station sends the instruction information of the conditional HO complete or data forwarding to the source base station, and after receiving the information, the source base station may start to execute data forwarding to the target base station and/or send the SNstatus information.
By the technical scheme of the embodiment, the problem of data forwarding in the conditional switching process can be solved, so that the switching process is more robust, and new service requirements and deployment scenes can be supported.
An embodiment of the present invention further provides a communication device, including: memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the handover method as described above.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the handover method described above are implemented.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, user equipment (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user equipment 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 user equipment. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or user equipment that comprises the element.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (42)
1. A handover method applied to a source base station is characterized by comprising the following steps:
sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a condition switching configuration;
and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
2. The handover method according to claim 1, wherein the data comprises data that has not been successfully transmitted by the terminal and/or unsent data and/or new data received from the core network.
3. The handover method according to claim 1, wherein the RRC connection reconfiguration message comprises at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
4. The handover method according to claim 1, wherein forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is satisfied comprises:
forwarding the transmitted data to a target base station while transmitting the data to the terminal;
and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
5. The handover method according to claim 1, wherein forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is satisfied comprises:
receiving indication information which is sent by the terminal and triggers condition switching, wherein the indication information indicates that the terminal starts to establish connection with a target base station or stops data interaction with a source base station;
forwarding data to a target base station and/or sending SN number state information to the target base station.
6. The handover method according to claim 5, wherein the indication information sent by the terminal that the conditional handover has been triggered is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
7. The handover method according to claim 1, wherein forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is satisfied comprises:
and under the condition of judging that the terminal triggers condition switching, forwarding data to a target base station and/or sending SN (service number) state information to the target base station.
8. The handover method according to claim 1, wherein forwarding data to a target base station and/or sending SN status information to the target base station when a preset data forwarding condition is satisfied comprises:
after receiving a condition switching completion message or data forwarding indication message sent by a target base station or a message that a terminal successfully accesses the target base station, forwarding data to the target base station and/or sending SN (service number) state information to the target base station.
9. The handover method according to claim 1, further comprising:
receiving an end mark sent by a core network element, wherein the end mark is sent after the core network element receives a path switching request of the target base station and completes path switching;
sending the end mark to the target base station;
and receiving a terminal context release message of the target base station.
10. A switching device applied to a source base station is characterized by comprising a processor and a transceiver,
the transceiver is used for sending an RRC connection reconfiguration message to a terminal, wherein the connection reconfiguration message comprises a conditional switching configuration; and under the condition of meeting a preset data forwarding condition, forwarding the data to a target base station and/or sending SN (service number) state information to the target base station.
11. The handover apparatus according to claim 10, wherein the data comprises data that has not been successfully transmitted by the terminal and/or unsent data and/or new data received from the core network.
12. The handover apparatus according to claim 10, wherein the RRC connection reconfiguration message comprises at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
13. The switching device of claim 10,
the transceiver is specifically configured to forward the transmitted data to a target base station while transmitting the data to the terminal; and after the terminal finishes the random access process with the target base station, stopping data interaction with the terminal and sending SN (service number) state information to the target base station.
14. The switching device of claim 10,
the transceiver is specifically configured to receive indication information that a condition handover has been triggered and is sent by the terminal, where the indication information indicates that the terminal has started to establish a connection with a target base station or that the terminal has stopped data interaction with a source base station; forwarding data to a target base station and/or sending SN number state information to the target base station.
15. The switching device according to claim 14, wherein the indication information sent by the terminal that the conditional switch has been triggered is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
16. The switching device of claim 10,
the transceiver is specifically configured to forward data to a target base station and/or send SN status information to the target base station when it is determined that the terminal has triggered the conditional handover.
17. The switching device of claim 10,
the transceiver is specifically configured to forward data to the target base station and/or send SN status information to the target base station after receiving a conditional handover complete message or data forwarding indication message sent by the target base station or a message that the terminal successfully accesses the target base station.
18. The switching device of claim 10,
the transceiver is further configured to receive an end flag sent by a core network element, where the end flag is sent after the core network element receives a path switching request of the target base station and completes path switching; sending the end mark to the target base station; and receiving a terminal context release message of the target base station.
19. A switching method is applied to a terminal, and is characterized by comprising the following steps:
receiving an RRC connection reconfiguration message sent by a source base station, wherein the RRC connection reconfiguration message comprises a condition switching configuration;
and under the condition of meeting the switching condition of the condition switching, sending indication information to the source base station, wherein the indication information indicates that the terminal starts to establish connection with the target base station or stops data interaction with the source base station.
20. The handover method according to claim 19, wherein the RRC connection reconfiguration message comprises at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
21. The handover method according to claim 19, further comprising:
stopping data interaction with the source base station.
22. The handover method according to claim 19, wherein the indication information is used to instruct the source base station to forward data to the target base station and/or send SN status information to the target base station.
23. The handover method according to claim 22, wherein the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
24. The handover method according to claim 19, wherein the method further comprises:
and sending a Radio Resource Control (RRC) reconfiguration completion message to the target base station.
25. A switching device applied to a terminal is characterized by comprising a processor and a transceiver,
the transceiver is configured to receive an RRC connection reconfiguration message sent by a source base station, where the RRC connection reconfiguration message includes a conditional handover configuration;
the processor is used for sending indication information to the source base station under the condition that a switching condition of condition switching is met, wherein the indication information indicates that the terminal starts to establish connection with the target base station or the terminal stops data interaction with the source base station.
26. The handover apparatus according to claim 25, wherein the RRC connection reconfiguration message comprises at least one of:
mobility control information;
radio resource configuration information;
randomly accessing resource configuration information;
an indication of a conditional switch;
triggering conditions for conditional switching.
27. The switching device of claim 25, wherein the transceiver is further configured to stop data interaction with the source base station.
28. The handover apparatus according to claim 25, wherein the indication information is used to instruct a source base station to forward data to a target base station and/or send SN status information to the target base station.
29. The switching device according to claim 28, wherein the indication information sent by the terminal is sent through a physical channel or MAC layer signaling or control PDU or RRC layer signaling.
30. The handover apparatus according to claim 25, wherein the transceiver is further configured to transmit a radio resource control RRC reconfiguration complete message to the target base station.
31. A handover method applied to a target base station is characterized by comprising the following steps:
receiving a Radio Resource Control (RRC) reconfiguration completion message or random access preamble information or scheduling transmission information sent by a terminal;
and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
32. The handover method according to claim 31, further comprising:
and receiving the data forwarded by the source base station and/or receiving SN (service number) state information of the source base station.
33. The handover method according to claim 32, wherein the data comprises data that has not been successfully transmitted by the terminal and/or unsent data and/or new data received from the core network.
34. The handover method according to claim 32, further comprising:
sending a path switching request to a core network element;
and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
35. The handover method according to claim 32, wherein before receiving the data forwarded by the source base station and/or receiving the SN number status information of the source base station, the method further comprises:
receiving a Radio Resource Control (RRC) reconfiguration completion message sent by a terminal or receiving random access preamble information or scheduling transmission information;
and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
36. A switching device, applied to a target base station, comprises a processor and a transceiver,
the transceiver is used for receiving a Radio Resource Control (RRC) reconfiguration completion message or random access preamble information or scheduling transmission information sent by a terminal; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
37. The switching device of claim 36,
the transceiver is also used for receiving data forwarded by the source base station and unsuccessfully transmitted data and new data and/or receiving SN number status information of the source base station.
38. The handover apparatus according to claim 37, wherein the data comprises data that has not been successfully transmitted by the terminal and/or unsent data and/or new data received from the core network.
39. The switching apparatus according to claim 36, wherein the transceiver is further configured to send a path switch request to a core network element; and after receiving the feedback message of the path switching completion, sending a terminal context release message to the source base station.
40. The switching device of claim 36,
the transceiver is also used for receiving a Radio Resource Control (RRC) reconfiguration completion message sent by the terminal or receiving random access preamble information or scheduling transmission information; and sending a condition switching completion message or indication information of data forwarding or indication information of successful access of the terminal to the target base station to the source base station.
41. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps in the handover method according to any one of claims 1 to 9 or the steps in the handover method according to any one of claims 19 to 24 or the steps in the handover method according to any one of claims 31 to 35.
42. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps in the handover method according to any one of claims 1 to 9 or the steps in the handover method according to any one of claims 19 to 24 or the steps in the handover method according to any one of claims 31 to 35.
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| PCT/CN2020/074351 WO2020168913A1 (en) | 2019-02-19 | 2020-02-05 | Switching method, apparatus and communication device |
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| CN201910124299.4A CN111586773A (en) | 2019-02-19 | 2019-02-19 | Switching method, device and communication equipment |
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