CN114258715A - Switching processing method and network equipment - Google Patents

Switching processing method and network equipment Download PDF

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Publication number
CN114258715A
CN114258715A CN201980099434.2A CN201980099434A CN114258715A CN 114258715 A CN114258715 A CN 114258715A CN 201980099434 A CN201980099434 A CN 201980099434A CN 114258715 A CN114258715 A CN 114258715A
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network device
downlink data
network
network equipment
indication information
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CN201980099434.2A
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CN114258715B (en
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尤心
付喆
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a switching processing method, a network device, a chip, a computer readable storage medium, a computer program product and a computer program, wherein the method comprises the following steps: the method comprises the steps that in the process that first network equipment executes first-class switching aiming at terminal equipment, whether the first network equipment meets preset conditions or not is determined; under the condition that the first network equipment meets a preset condition, the first network equipment forwards a downlink data set to second network equipment; the preset conditions comprise: the downlink transmission of the first network device does not employ duplicate transmission.

Description

Switching processing method and network equipment Technical Field
The present invention relates to the field of information processing technologies, and in particular, to a handover processing method, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
Background
In the related art, the source base station starts to forward data to the target base station and sends a status report to the target base station after receiving the switching request feedback of the target base station, and the terminal equipment directly communicates with the target base station after successfully accessing the target base station. However, for the handover of a dual active protocol stack (dual active protocol stack), the terminal device maintains the connection between the source base station and the target base station at the same time, and therefore, how to forward downlink data in the handover in such a scenario becomes a problem to be solved.
Disclosure of Invention
To solve the foregoing technical problem, embodiments of the present invention provide a handover processing method, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
In a first aspect, a handover processing method is provided, where the method includes:
the method comprises the steps that in the process that first network equipment executes first-class switching aiming at terminal equipment, whether the first network equipment meets preset conditions or not is determined;
under the condition that the first network equipment meets a preset condition, the first network equipment forwards a downlink data set to second network equipment;
the preset conditions comprise: the downlink transmission of the first network device does not employ duplicate transmission.
In a second aspect, a network device is provided, which includes:
the processing unit is used for determining whether the network equipment meets a preset condition or not in the process of executing first-class switching aiming at the terminal equipment;
the communication unit is used for forwarding the downlink data set to second network equipment under the condition that the network equipment meets preset conditions; the preset conditions comprise: the downlink transmission of the network device does not employ duplicate transmission.
In a third aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the first aspect or each implementation manner thereof.
In a fourth aspect, a chip is provided for implementing the method in the foregoing implementation manners.
Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device on which the chip is installed performs the method according to the first aspect or each implementation manner thereof.
In a fifth aspect, a computer-readable storage medium is provided for storing a computer program, which causes a computer to execute the method of the first aspect or its implementations.
A sixth aspect provides a computer program product comprising computer program instructions for causing a computer to perform the method of the first aspect or its implementations.
In a seventh aspect, a computer program is provided, which, when run on a computer, causes the computer to perform the method of the first aspect or its implementations.
By adopting the above scheme, when the first type of handover is performed, whether the first network device transmits the downlink data packet to the second network device can be determined according to whether the first network device supports the copy transmission of the downlink transmission. Therefore, the content of copy transmission forwarding in the first type switching process is provided, and the downlink data packet is forwarded to the second network device only when the first network device does not adopt copy transmission, so that redundant transmission of the first network device and the second network device in the first type switching process is avoided.
Drawings
Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;
fig. 2 is a schematic flow chart of a handover processing method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a handover process;
fig. 4 is a schematic diagram of a network device structure according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a chip provided by an embodiment of the present application;
fig. 7 is a schematic diagram two of a communication system architecture provided in an embodiment of the present application.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.
For example, a communication system 100 applied in the embodiment of the present application may be as shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a UE120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Network device (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.
The communication system 100 also includes at least one UE120 located within the coverage area of the network device 110. "UE" as used herein includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or another UE's device configured to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A UE that is arranged to communicate over a radio interface may be referred to as a "radio communication terminal", "radio terminal" or "mobile terminal".
Optionally, a Device to Device (D2D) communication may be performed between UEs 120.
It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
An embodiment of the present invention provides a handover processing method, as shown in fig. 2, the method includes:
step 21: the method comprises the steps that in the process that first network equipment executes first-class switching aiming at terminal equipment, whether the first network equipment meets preset conditions or not is determined;
step 22: under the condition that the first network equipment meets a preset condition, the first network equipment forwards a downlink data set to second network equipment;
the preset conditions comprise: the downlink transmission of the first network device does not employ duplicate transmission.
Wherein the first class switches to: a handover with the second network device and the protocol stack between the first network device is maintained during the handover.
Specifically, the first type of handover may be an Enhanced chain-first-before-chain-break (eMBB) handover, or may be a dual active protocol stack (dual active protocol stack) handover. Other names may exist as long as the handover procedure capable of maintaining the connection with the second network device and the first network device at the time of handover is within the scope of the present embodiment.
In this embodiment, the network device may be a base station on the network side; the first network device may be a source base station to which the terminal device is connected, and the second network device may be a target base station. The terminal equipment is equipment capable of simultaneously keeping protocol stacks with the first network equipment and the second network equipment during switching.
First, a scenario of this embodiment is explained, and similar to the LTE system, a New Radio (NR) system supports a handover procedure of a connected terminal device. When a terminal device using network service moves from one cell to another cell, or due to reasons such as adjustment of wireless transmission service load, activation of operation maintenance, device failure, etc., in order to ensure communication continuity and service quality, the system needs to transfer a communication link between the terminal device and an original cell to a new cell, i.e., to perform a handover procedure. Taking an Xn interface switching process as an example, a corresponding switching process is described, where the whole switching process is divided into the following three stages, as shown in fig. 3, including:
a switching preparation stage: as shown in steps 0-5 in fig. 3, the second network device and the first network device perform processing according to the Mobility control information provided by the Access and Mobility Management Function entity (AMF); the terminal equipment performs measurement control and reporting, the first network equipment performs switching decision, and then the first network equipment performs switching request, management control and switching request confirmation to the second network equipment. The switching confirmation message contains the switching command generated by the second network equipment, and the first network equipment is not allowed to modify the switching command generated by the second network equipment, and directly forwards the switching command to the terminal equipment.
A switching execution stage: as shown in step 6-7 in fig. 3, the terminal device immediately executes a handover process after receiving the handover command, which may include performing Radio Access Network (RAN) handover between the terminal device and the first Network device, and the terminal device disconnects the first Network device, synchronizes with the second Network device, and establishes a connection (e.g., executes random Access, sends an RRC handover complete message to the target base station, etc.); SN state transfer; the method can further include the first network device transmitting new data of a User Plane Function (UPF) and transmitting the cached data to the second network device.
And a switching completion stage: as shown in steps 8-12 in fig. 3, after the RAN handover is completed, the terminal device performs user data transmission between the second network device and the UPF; then the second network device and the AMF send a path switching request, the UPF executes the path switching, then the AMF informs the second network device of the completion of the path switching through the first network device, the AMF sends a path switching request confirmation to the second network device, and then the second network device informs the first network device of the release of the user data.
In addition, another switching scenario corresponding to the embodiment may further include the following two architectures:
based on the switching of the double connection, under the condition, when switching, the second network equipment is added as an auxiliary contact (SN), then the SN is changed into a Main Node (MN) through role switching signaling, and finally the first network equipment is released, so that the effect of reducing the interruption time during switching is achieved.
Another architecture is to maintain a handover of a connection to a first network device and a second network device at the same time, which may be understood as an Enhanced make-before-break (eMBB) handover, where the difference of the handover is that the terminal device continues to maintain a connection to the first network device while initiating a random access to the second network device when receiving a handover command (HO command), and does not release the connection to the first network device until the terminal device completes accessing the second network device.
Further, the following limitations are added: 1. in the 0ms handover, simultaneous UpLink (UL) Physical UpLink Shared Channel (PUSCH) transmission does not need to be supported; 2. after receiving the first UL grant sent by the second network device (i.e., the target base station), the UL PUSCH is handed over by the first network device to the second network device.
In one example, the first network device may first determine whether the downstream transmission employs a duplicate transmission. May be one of the following:
the first network equipment determines whether downlink transmission adopts copy transmission;
and the first network equipment determines whether the downlink transmission adopts the copy transmission or not according to the indication of the second network equipment.
Specifically, the determining, by the first network device, whether the downlink transmission employs the duplicate transmission may be:
the first network device may determine that the downlink transmission does not adopt the duplicate transmission when the first network device does not support the downlink transmission adopting the duplicate transmission;
the first network device may determine whether to adopt the duplicate transmission according to an actual situation under the condition that the duplicate transmission is supported, for example, the current network state is good, the duplicate transmission may not be adopted, and if the network state is poor, the duplicate transmission may be adopted; alternatively, reference may be made to other communication parameters, such as communication quality parameters, channel quality parameters, and the like;
or, the first network device may determine whether downlink transmission adopts duplicate transmission according to a protocol specification under the condition that the first network device supports duplicate transmission; the protocol may specify that the first network device does not use the duplicate transmission in which process flow, for example, may specify that the duplicate transmission is not used in the process flow of the handover, which is not exhaustive here.
The determining, by the first network device, whether the downlink transmission employs the duplicate transmission according to the indication of the second network device may be:
the second network device may obtain, in advance, a capability of the first network device from the core network (or from the first network device), where the capability may include whether the first network device supports duplicated transmission of downlink transmission, and if not, may not indicate;
if the downlink transmission copy transmission is supported, when the second network device determines that the first network device does not need to adopt the copy transmission, the second network device may send the indication to the first network device to indicate that the first network device does not adopt the copy transmission, otherwise, if the downlink transmission of the first network device needs to adopt the copy transmission, the first network device may be notified of adopting the copy transmission through the indication.
Further, if the first network device uses the duplicate transmission for the downlink transmission, that is, the preset condition is not satisfied, at this time, the first network device may not forward the downlink data packet to the second network device; if the downlink transmission adopts copy transmission, namely the preset condition is met, the first network equipment forwards the downlink data packet to the second network equipment at the moment.
In this embodiment, the downlink transmission may be downlink transmission within a certain time period, and a time window may be used to control a duration of the downlink transmission, for example, the duration may be a length of the time window from the start of performing the first type handover to the end of the first type handover.
On the basis of the foregoing example, in another example, the preset condition further includes one of:
the first network equipment receives first indication information of the second network equipment; the first indication information is used for indicating a first network device to release connection with a terminal device, or indicating the first network device to stop data forwarding with the terminal device;
the first network equipment receives second indication information sent by second network equipment; wherein the second indication information is used for indicating the first network equipment to release UE context;
the first network equipment receives third indication information sent by a core network; wherein the third indication information carries an end identifier of the path switching;
the first network equipment receives fourth indication information sent by the terminal equipment; and the fourth indication information is used for representing that the terminal equipment is successfully accessed to the second network equipment.
That is, the preset condition may include one of the above conditions on the basis of satisfying that the downlink transmission does not adopt the duplicate transmission.
Specifically, in the first case, the first network device receives first indication information of the second network device; the first indication information is used for indicating a first network device to release connection with a terminal device, or indicating the first network device to stop data forwarding with the terminal device.
In this case, the second network device may send the first indication information when sending a handover request acknowledgement to the first network device; still alternatively, the first indication information may be carried by a handover request acknowledgement.
In the second case, the first network device receives second indication information sent by a second network device; wherein the second indication information is used for indicating the first network equipment to release UE context;
the second network device may send the second indication information when sending the handover request acknowledgement to the first network device; or, the second indication information may be carried by a handover request acknowledgement; or, after the first network device completes the SN status transmission to the second network device, the second network device sends the second indication information to the first network device; still alternatively, the second network device may send the second indication information to the first network device before or after the RAN handover is completed.
In a third case, the first network device receives third indication information sent by a core network; wherein the third indication information carries an end identifier of the path switching;
after the second network device sends the path switching request to the core network (AMF), the core network sends third indication information to the first network device, where the third indication information indicates that the path switching of the first network device is ended, where the third indication information may carry an End Marker (End Marker) of the path switching.
In a fourth case, the first network device receives fourth indication information sent by a terminal device; and the fourth indication information is used for representing that the terminal equipment is successfully accessed to the second network equipment.
It may be that, after step 8 in fig. 3 is completed, the terminal device sends fourth indication information to the first network device to indicate that the terminal device has successfully accessed the second network device.
It should be understood that the preset condition that the downlink transmission does not adopt the duplicate transmission can be used in combination with any one of the four situations.
Based on the foregoing, various examples, in yet another example,
the downlink data set comprises at least one of the following:
receiving a downlink data packet to be transmitted from an upper layer;
and the downlink data packet which is transmitted to the terminal equipment and is not correctly fed back is not received.
When the preset condition is met, the first network device receives a part of downlink data packets transmitted from an upper layer and does not transmit the part of downlink data packets to the terminal device, and the part of unsent data packets can be understood as the downlink data packets to be transmitted; the first network device forwards the downlink data packet to the second network device, and the second network device may resend the downlink data packet to the terminal device.
And/or when the preset condition is met, the first network device receives a part of downlink data packets transmitted from the upper layer and sends the part of downlink data packets to the terminal device, but the terminal device does not send ACK (namely acknowledgement) feedback information to the first network device, and the part of downlink data packets also need to be forwarded to the second network device by the first network device, and then can be sent to the terminal device again by the second network device.
For example, when the downlink transmission of the first network device does not adopt the duplicate transmission and the first network device receives the first indication information of the second network device, it may be determined that the downlink data packet includes a downlink data packet to be transmitted, which is received from an upper layer before the first indication is received, and/or a downlink data packet which has been transmitted to the terminal device and has not received the correct feedback. The use of other preset conditions is not exhaustive here.
In another case, if the path switching is completed, the downlink data set includes:
and receiving the downlink data packet before the ending mark of the path switching.
In this case, the downlink data packet may be all downlink data packets within the period from the time of the start of the handover (that is, when the first network device sends the handover request to the second network device, or when the first network device makes the handover decision), until the end identifier of the path handover is received.
Or, in this case, when the path switching is completed, the downlink data packet may include: before receiving a finishing mark of path switching, receiving a downlink data packet to be transmitted from an upper layer; and/or the downlink data packet which is transmitted to the terminal equipment and does not receive the correct feedback before the ending mark of the path switching is received.
The path switching may be performed by uplink path switching, or by uplink and downlink path switching.
For example, the downlink transmission at the first network device does not adopt the duplicate transmission, and the first network device receives second indication information sent by the second network device, where the second indication information is used to indicate the first network device to release the UE context; it can be determined that the downlink packet includes the downlink packet before the end flag of the path switch is received.
For another example, the downlink transmission of the first network device does not adopt duplicate transmission, and the first network device receives the third indication information sent by the core network; wherein the third indication information carries an end identifier of the path switching; then the first network device may determine that the downlink data packet includes: before receiving a finishing mark of path switching, receiving a downlink data packet to be transmitted from an upper layer; and/or the downlink data packet which is transmitted to the terminal equipment and does not receive the correct feedback before the ending mark of the path switching is received.
In another case, the downlink data set further includes:
a downlink data state; wherein the downlink data state includes a hyper frame number HFN of at least one downlink data packet and/or a sequence number SN of at least one downlink data packet.
In this case, it should be noted that the downlink data set may only include the downlink data status, that is, even if the downlink data packet is not forwarded, the first network device may also forward the downlink data status to the second network device alone, where the status may be an SN and/or an HFN of at least one downlink data packet.
Further, this case may be combined with the first case, for example, the downlink data set may include: receiving a downlink data packet to be transmitted from an upper layer and a corresponding SN and/or HFN thereof;
the downlink data packet which is transmitted to the terminal equipment and has not received the correct feedback, and the corresponding SN and/or HFN.
In addition, this case may be combined with the second case, for example, the downlink data set may include: and receiving the downlink data packet before the ending mark of the path switching and the corresponding SN and/or HFN.
This case is combined with the foregoing two cases, for example, the downlink data set may include: before receiving a path switching end mark, receiving a downlink data packet to be transmitted from an upper layer and a corresponding SN and/or HFN thereof; and/or, before receiving the end mark of the path switching, the downlink data packet which is transmitted to the terminal equipment and has not received the correct feedback, and the corresponding SN and/or HFN thereof.
By adopting the above scheme, when the terminal device performs the first-type handover, whether the first network device transmits the downlink data packet to the second network device can be determined according to whether the first network device supports the copy transmission of the downlink transmission. Therefore, the content of copy transmission forwarding in the first type switching process is provided, and the downlink data packet is forwarded to the second network device only when the first network device does not adopt copy transmission, so that redundant transmission of the first network device and the second network device in the first type switching process is avoided.
An embodiment of the present invention provides a network device, as shown in fig. 4, including:
a processing unit 41, configured to determine whether the network device meets a preset condition in a process of performing a first type handover for a terminal device;
a communication unit 42, configured to forward the downlink data set to a second network device when the network device meets a preset condition; the preset conditions comprise: the downlink transmission of the network device does not employ duplicate transmission.
Wherein the first class switches to: a handover with the second network device and a protocol stack between the network devices is maintained during the handover.
Specifically, the first type of handover may be an Enhanced chain-first-before-chain-break (eMBB) handover, or may be a dual active protocol stack (dual active protocol stack) handover. Other names may exist as long as the handover procedure capable of maintaining the connection with the second network device and the network device at the time of handover is within the scope of the present embodiment.
In this embodiment, the network device may be a base station on the network side; the network device may be a source base station to which the terminal device is connected, and the second network device may be a target base station. The terminal device is a device capable of simultaneously maintaining the protocol stacks with the network device and the second network device during handover.
In one example, processing unit 41 may first determine whether the downlink transmission employs a duplicate transmission. May be one of the following:
the processing unit 41 determines whether the downlink transmission employs a duplicate transmission;
the processing unit 41 determines whether the downlink transmission employs the duplicate transmission according to the indication of the second network device.
On the basis of the foregoing example, in another example, the preset condition further includes one of:
receiving first indication information of the second network equipment; the first indication information is used for indicating a network device to release connection with a terminal device, or indicating the network device to stop data forwarding with the terminal device;
receiving second indication information sent by second network equipment; wherein the second indication information is used for indicating the network equipment to release UE context;
receiving third indication information sent by a core network; wherein the third indication information carries an end identifier of the path switching;
receiving fourth indication information sent by the terminal equipment; and the fourth indication information is used for representing that the terminal equipment is successfully accessed to the second network equipment.
It should be understood that the preset condition that the downlink transmission does not adopt the duplicate transmission can be used in combination with any one of the four situations.
Based on the foregoing, various examples, in yet another example,
the downlink data set comprises at least one of the following:
receiving a downlink data packet to be transmitted from an upper layer;
and the downlink data packet which is transmitted to the terminal equipment and is not correctly fed back is not received.
It can be understood that when the preset condition is met, a part of downlink data packets which have been received by the network device and transmitted from the upper layer are not transmitted to the terminal device, and the part of unsent data packets can be understood as the aforementioned downlink data packets to be transmitted; the network device forwards the downlink data packet to the second network device, and the second network device may resend the downlink data packet to the terminal device.
And/or when the preset condition is met, the network device receives a part of downlink data packets transmitted from the upper layer and transmits the part of downlink data packets to the terminal device, but the terminal device does not transmit ACK (acknowledgement) feedback information to the network device, and the part of downlink data packets also need to be forwarded to the second network device by the network device, and then can be retransmitted to the terminal device by the second network device.
In another case, if the path switching is completed, the downlink data set includes:
and receiving the downlink data packet before the ending mark of the path switching.
In this case, the downlink data packet may be a downlink data packet that is all received within the period of time from the start of handover (that is, when the network device sends a handover request to the second network device, or when the network device makes a handover decision, where the handover decision may include a process in which the network device makes an evaluation and a decision according to a measurement result reported by the terminal device, for example, the process may include a process of selecting a target cell from measurement results of multiple neighboring cells reported by the terminal device, and so on) until an end identifier of path handover is received.
Or, in this case, when the path switching is completed, the downlink data packet may include: before receiving a finishing mark of path switching, receiving a downlink data packet to be transmitted from an upper layer; and/or the downlink data packet which is transmitted to the terminal equipment and does not receive the correct feedback before the ending mark of the path switching is received.
The path switching may be performed by uplink path switching, or by uplink and downlink path switching.
In another case, the downlink data set further includes:
a downlink data state; wherein the downlink data state includes a hyper frame number HFN of at least one downlink data packet and/or a sequence number SN of at least one downlink data packet.
In this case, it should be noted that the downlink data set may only include the downlink data status, that is, even if the downlink data packet is not forwarded, the network device may also forward the downlink data status to the second network device alone, where the status may be SN and/or HFN of the downlink data packet.
Further, this case may be combined with the first case, for example, the downlink data set may include: receiving a downlink data packet to be transmitted from an upper layer and a corresponding SN and/or HFN thereof;
the downlink data packet which is transmitted to the terminal equipment and has not received the correct feedback, and the corresponding SN and/or HFN.
In addition, this case may be combined with the second case, for example, the downlink data set may include: and receiving the downlink data packet before the ending mark of the path switching and the corresponding SN and/or HFN.
This case is combined with the foregoing two cases, for example, the downlink data set may include: before receiving a path switching end mark, receiving a downlink data packet to be transmitted from an upper layer and a corresponding SN and/or HFN thereof; and/or, before receiving the end mark of the path switching, the downlink data packet which is transmitted to the terminal equipment and has not received the correct feedback, and the corresponding SN and/or HFN thereof.
Therefore, by adopting the above scheme, when the terminal device performs the first-type switching, whether the network device transmits the downlink data packet to the second network device can be determined according to whether the network device supports the copy transmission of the downlink transmission. Therefore, the content of copy transmission forwarding in the first type switching processing is provided, and the downlink data packet is forwarded to the second network equipment when the network equipment does not adopt copy transmission, so that redundant transmission between the network equipment and the second network equipment in the first type switching process is avoided.
Fig. 5 is a schematic structural diagram of a communication device 900 according to an embodiment of the present invention, where the communication device in this embodiment may be embodied as a network device in the foregoing embodiment. The communication device 900 shown in fig. 5 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the method in the embodiment of the present invention.
Optionally, as shown in fig. 5, the communication device 900 may further include a memory 920. From the memory 920, the processor 910 may call and execute a computer program to implement the method in the embodiment of the present invention.
The memory 920 may be a separate device from the processor 910, or may be integrated in the processor 910.
Optionally, as shown in fig. 5, the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.
The transceiver 930 may include a transmitter and a receiver, among others. The transceiver 930 may further include one or more antennas.
Optionally, the communication device 900 may specifically be a network device according to the embodiment of the present invention, and the communication device 900 may implement a corresponding process implemented by the network device in each method according to the embodiment of the present invention, which is not described herein again for brevity.
Optionally, the communication device 900 may specifically be a terminal device or a network device in the embodiment of the present invention, and the communication device 900 may implement a corresponding process implemented by a mobile terminal/a terminal device in each method in the embodiment of the present invention, and for brevity, details are not described here again.
Fig. 6 is a schematic structural diagram of a chip of an embodiment of the present invention. The chip 1000 shown in fig. 6 includes a processor 1010, and the processor 1010 may call and run a computer program from a memory to implement the method in the embodiment of the present invention.
Optionally, as shown in fig. 6, the chip 1000 may further include a memory 1020. From memory 1020, processor 1010 may retrieve and execute computer programs to implement the methods of embodiments of the present invention.
The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.
Optionally, the chip 1000 may further include an input interface 1030. The processor 1010 may control the input interface 1030 to communicate with other devices or chips, and specifically may obtain information or data transmitted by the other devices or chips.
Optionally, the chip 1000 may further include an output interface 1040. The processor 1010 may control the output interface 1040 to communicate with other devices or chips, and may particularly output information or data to the other devices or chips.
Optionally, the chip may be applied to the network device in the embodiment of the present invention, and the chip may implement the corresponding process implemented by the terminal device in each method in the embodiment of the present invention, and for brevity, details are not described here again.
It should be understood that the chips mentioned in the embodiments of the present invention may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip.
It should be understood that the processor of embodiments of the present invention may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
It will be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present invention may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.
Fig. 7 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in fig. 7, the communication system 800 includes a terminal device 810 and a network device 820.
The terminal device 810 may be configured to implement the corresponding function implemented by the UE in the foregoing method, and the network device 820 may be configured to implement the corresponding function implemented by the network device in the foregoing method, which is not described herein again for brevity.
The embodiment of the invention also provides a computer readable storage medium for storing the computer program.
Optionally, the computer-readable storage medium may be applied to a network device or a terminal device in the embodiment of the present invention, and the computer program enables a computer to execute corresponding processes implemented by the network device in each method in the embodiment of the present invention, which is not described herein again for brevity.
Embodiments of the present invention also provide a computer program product, which includes computer program instructions.
Optionally, the computer program product may be applied to a network device or a terminal device in the embodiment of the present invention, and the computer program instruction enables a computer to execute corresponding processes implemented by the network device in each method in the embodiment of the present invention, which is not described herein again for brevity.
The embodiment of the invention also provides a computer program.
Optionally, the computer program may be applied to the network device or the terminal device in the embodiment of the present invention, and when the computer program runs on a computer, the computer is enabled to execute corresponding processes implemented by the network device in the methods in the embodiment of the present invention, which is not described herein again for brevity.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (19)

  1. A method of handover processing, the method comprising:
    the method comprises the steps that in the process that first network equipment executes first-class switching aiming at terminal equipment, whether the first network equipment meets preset conditions or not is determined;
    under the condition that the first network equipment meets a preset condition, the first network equipment forwards a downlink data set to second network equipment;
    the preset conditions comprise: the downlink transmission of the first network device does not employ duplicate transmission.
  2. The method of claim 1, wherein the downlink data set comprises at least one of:
    receiving a downlink data packet to be transmitted from an upper layer;
    and the downlink data packet which is transmitted to the terminal equipment and is not correctly fed back is not received.
  3. The method according to claim 1 or 2, wherein if the path switching is completed, the downlink data set includes:
    and receiving the downlink data packet before the ending mark of the path switching.
  4. The method according to any one of claims 1-3, wherein the downlink data set comprises:
    a downlink data state; wherein the downlink data state includes a hyper frame number HFN of at least one downlink data packet and/or a sequence number SN of at least one downlink data packet.
  5. The method according to any one of claims 1-4, wherein the preset conditions further include one of:
    the first network equipment receives first indication information of the second network equipment; the first indication information is used for indicating a first network device to release connection with a terminal device, or indicating the first network device to stop data forwarding with the terminal device;
    the first network equipment receives second indication information sent by second network equipment; wherein the second indication information is used for indicating the first network equipment to release UE context;
    the first network equipment receives third indication information sent by a core network; wherein the third indication information carries an end identifier of the path switching;
    the first network equipment receives fourth indication information sent by the terminal equipment; and the fourth indication information is used for representing that the terminal equipment is successfully accessed to the second network equipment.
  6. The method of claim 1, wherein the method further comprises one of:
    the first network equipment determines whether downlink transmission adopts copy transmission;
    and the first network equipment determines whether the downlink transmission adopts the copy transmission or not according to the indication of the second network equipment.
  7. The method of claim 1, wherein the first type of handover is: the terminal device maintains the switching of the protocol stacks between the first network device and the second network device during the switching process.
  8. A network device, comprising:
    the processing unit is used for determining whether the network equipment meets a preset condition or not in the process of executing the first-class switching aiming at the terminal equipment;
    the communication unit is used for forwarding the downlink data set to second network equipment under the condition that the network equipment meets preset conditions; the preset conditions comprise: the downlink transmission of the network device does not employ duplicate transmission.
  9. The network device of claim 8, wherein the set of downlink data comprises at least one of:
    receiving a downlink data packet to be transmitted from an upper layer;
    and the downlink data packet which is transmitted to the terminal equipment and is not correctly fed back is not received.
  10. The network device according to claim 8 or 9, wherein if the path switching is completed, the downlink data set includes:
    and receiving the downlink data packet before the ending mark of the path switching.
  11. The network device of any of claims 8-10, wherein the set of downlink data comprises:
    a downlink data state; wherein the downlink data state includes a hyper frame number HFN of at least one downlink data packet and/or a sequence number SN of at least one downlink data packet.
  12. The network device of any of claims 8-11, wherein the preset condition further comprises one of:
    receiving first indication information of the second network equipment; the first indication information is used for indicating a network device to release connection with a terminal device, or indicating the network device to stop data forwarding with the terminal device;
    receiving second indication information sent by second network equipment; wherein the second indication information is used for indicating the network equipment to release UE context;
    receiving third indication information sent by a core network; wherein the third indication information carries an end identifier of the path switching;
    receiving fourth indication information sent by the terminal equipment; and the fourth indication information is used for representing that the terminal equipment is successfully accessed to the second network equipment.
  13. The network device of claim 8, wherein the processing unit is to perform one of:
    determining whether downlink transmission adopts copy transmission;
    and determining whether the downlink transmission adopts the copy transmission or not according to the indication of the second network equipment.
  14. The network device of claim 8, wherein the first type of handover is: the terminal device maintains a handover with the network device and the protocol stack between the second network device during the handover.
  15. A network device, comprising: a processor and a memory for storing a computer program capable of running on the processor,
    wherein the memory is adapted to store a computer program and the processor is adapted to call and run the computer program stored in the memory to perform the steps of the method according to any of claims 1-7.
  16. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1-7.
  17. A computer-readable storage medium for storing a computer program for causing a computer to perform the steps of the method according to any one of claims 1 to 7.
  18. A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 7.
  19. A computer program for causing a computer to perform the method of any one of claims 1 to 7.
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