CN112584450A

CN112584450A - Anchor point conversion processing method, device and equipment

Info

Publication number: CN112584450A
Application number: CN201910941035.8A
Authority: CN
Inventors: 张大钧
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-03-30
Also published as: WO2021063310A1

Abstract

The invention provides an anchor point conversion processing method, device and equipment, and relates to the technical field of communication. The method is applied to first network side equipment and comprises the following steps: transmitting first indication information of data transmission under the condition that a forwarded downlink data packet is transmitted to second network side equipment and original link data transmission is not stopped, wherein the first indication information comprises a starting sequence number SN allocated to the forwarded downlink data packet by the first network side equipment and a hyper frame number HFN corresponding to the starting sequence number SN; and sending second indication information of data transmission under the condition of stopping the data transmission of the source link, wherein the second indication information is used for indicating the second network side equipment to carry out anchor point switching. The scheme of the invention solves the problem of data interruption during network switching and improves the system mobility.

Description

Anchor point conversion processing method, device and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for anchor point transition processing.

Background

In a mobile scenario, after a user equipment UE moves to a signal coverage overlapping position of two network devices, a network triggers a mobility event to perform network handover. The specific process of the current network switching is as follows: the data transmission of the source network side equipment is interrupted firstly, and the service transmission is continued after the target network side equipment is accessed.

Therefore, the current network handover procedure may cause data interruption within a period of time, which affects further improvement of system mobility.

Disclosure of Invention

The invention aims to provide an anchor point conversion processing method, device and equipment to avoid data interruption during network switching and improve the mobility of a system.

In order to achieve the above object, an embodiment of the present invention provides an anchor point transition processing method, applied to a first network device, including:

transmitting first indication information of data transmission under the condition that a forwarded downlink data packet is transmitted to second network side equipment and original link data transmission is not stopped, wherein the first indication information comprises a starting sequence number SN allocated to the forwarded downlink data packet by the first network side equipment and a hyper frame number HFN corresponding to the starting sequence number SN;

and sending second indication information of data transmission under the condition of stopping the data transmission of the source link, wherein the second indication information is used for indicating the second network side equipment to carry out anchor point switching.

Optionally, before the sending the first indication information of the data transmission, the method includes:

sending a transit address request message to the second network side equipment;

and receiving the transit address fed back by the second network side equipment.

Optionally, the method further comprises:

and sending the forwarding downlink data packet to the second network side equipment according to the transit address.

Optionally, the sending the forwarded downlink data packet to the second network side device includes:

transmitting the forwarding downlink data packet through a user plane general packet radio service tunneling protocol GTP-U; and the expansion head of the GTP-U carries the SN corresponding to the forwarding downlink data packet.

Optionally, the first indication information further includes uplink data reception status information of the first network side device.

Optionally, the uplink data receiving status information includes: and/or the HFN corresponding to the SN of the data packet which is not received by the uplink.

Optionally, the second indication information includes a starting value of the SN assigned by the second network-side device.

Optionally, the second indication information further comprises at least one of the following information:

an HFN corresponding to a starting value of the SN;

the SN of the out-of-order uplink data packet received by the first network side equipment;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, after sending the second indication information of the data transmission, the method further includes:

and sending a new downlink data packet and/or an out-of-order uplink data packet to the second network side equipment.

Optionally, the first network-side device includes: a first central unit control plane and a first central unit user plane;

before the sending the first indication information of the data transmission, the method further includes:

the first central unit control plane initiates a first allocation count query to the first central unit user plane;

and the first central unit user plane inquires and feeds back first distribution count information to the first central unit control plane according to the first distribution count, wherein the first distribution count information comprises a starting SN of a forwarded downlink data packet and an HFN corresponding to the starting SN.

Optionally, before the sending the second indication information of the data transmission, the method further includes:

said first central unit control plane initiating a second allocation count query to said first central unit user plane;

and the first central unit user plane inquires second distribution counting information fed back to the first central unit control plane according to the second distribution counting, wherein the second distribution counting information comprises the current latest SN and the HFN corresponding to the current latest SN.

In order to achieve the above object, an embodiment of the present invention provides an anchor point switching processing method, applied to a second network device, including:

receiving first indication information of data transmission under the condition of receiving a forwarded downlink data packet sent by first network side equipment and not stopping original link data transmission, wherein the first indication information comprises a starting sequence number SN allocated by the first network side equipment to the forwarded downlink data packet and a hyper frame number HFN corresponding to the starting sequence number SN;

and receiving second indication information of data transmission under the condition of stopping data transmission of a source link, wherein the second indication information is used for indicating the second network side equipment to carry out anchor point switching.

Optionally, before receiving the first indication information of the data transmission, the method includes:

receiving a transit address request message sent by the first network side equipment;

and feeding back the transit address of the forwarded downlink data packet to the first network side device according to the transit address request message.

Optionally, the method further comprises:

and receiving the forwarded downlink data packet sent by the first network side device according to the transit address, and processing the forwarded data packet.

Optionally, the receiving the forwarded downlink data packet sent by the first network side device includes:

receiving the forwarding downlink data packet through a user plane general packet radio service tunneling protocol GTP-U; and the expansion head of the GTP-U carries the SN corresponding to the forwarding downlink data packet.

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, after receiving the second indication information of the data transmission, the method further includes:

and receiving a new downlink data packet and/or an out-of-order uplink data packet sent by the first network side equipment.

Optionally, after receiving a new downlink data packet and/or an out-of-order uplink data packet sent by the first network side device, the method further includes:

if a new downlink data packet is received, distributing SN for the new downlink data packet according to the initial value in the second indication information;

and if the out-of-order uplink data packet is received, after the path conversion is completed, the out-of-order uplink data packet is sent to a core network.

Optionally, the second network-side device includes: a second central unit control plane and a second central unit user plane;

after receiving the first indication information of the data transmission, the method further includes:

and the second central unit controls the starting SN for sending the forwarding downlink data packet to the user plane of the second central unit and the HFN corresponding to the starting SN.

and the second central unit control plane sends the initial value of the SN carried by the second indication information to the second central unit user plane.

In order to achieve the above object, an embodiment of the present invention provides a network-side device, where the network-side device is a first network-side device, and includes a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor; the transceiver is to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the transceiver is further configured to:

In order to achieve the above object, an embodiment of the present invention provides a network-side device, where the network-side device is a second network-side device, and includes a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor; the transceiver is to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the transceiver is further configured to:

Optionally, the processor is configured to: if a new downlink data packet is received, distributing SN for the new downlink data packet according to the initial value in the second indication information;

the transceiver is further configured to: and if the out-of-order uplink data packet is received, after the path conversion is completed, the out-of-order uplink data packet is sent to a core network.

To achieve the above object, an embodiment of the present invention provides a handover processing apparatus, applied to a first network device, including:

a first sending module, configured to send first indication information of data transmission when a forwarded downlink data packet is transmitted to a second network side device and original link data transmission is not stopped, where the first indication information includes a start sequence number SN allocated by the first network side device to the forwarded downlink data packet and a hyper frame number HFN corresponding to the start sequence number SN;

a second sending module, configured to send second indication information for data transmission when data transmission of a source link is stopped, where the second indication information is used to indicate the second network-side device to perform anchor point switching.

To achieve the above object, an embodiment of the present invention provides a handover processing apparatus, applied to a second network device, including:

a first receiving module, configured to receive first indication information of data transmission when receiving a forwarded downlink data packet sent by a first network side device and an original link data transmission is not stopped, where the first indication information includes a start sequence number SN and a hyper frame number HFN corresponding to the start sequence number SN, which are allocated to the forwarded downlink data packet by the first network side device;

a second receiving module, configured to receive second indication information for data transmission when data transmission of a source link is stopped, where the second indication information is used to indicate the second network-side device to perform anchor point switching.

To achieve the above object, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the anchor point transition processing method as applied to a first network-side device or the steps in the anchor point transition processing method as applied to a second network-side device.

The technical scheme of the invention has the following beneficial effects:

in the method of the embodiment of the present invention, when a forwarded downlink data packet is transmitted to a second network side device and the original link data transmission is not stopped, first indication information related to the data transmission is sent first, where the first indication information includes a start SN of the forwarded downlink data packet and an HFN corresponding to the start SN; and then, under the condition of stopping the data transmission of the source link, further sending second indication information about the data transmission, and indicating the second network side equipment to carry out anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

Drawings

Fig. 1 is a schematic flow chart of an anchor point conversion processing method according to an embodiment of the present invention;

fig. 2 is a schematic application diagram of an anchor point conversion processing method according to an embodiment of the present invention;

FIG. 3 is a second schematic view illustrating an application of the anchor point transition processing method according to the embodiment of the present invention;

FIG. 4 is a flowchart illustrating an anchor point transition processing method according to another embodiment of the invention;

fig. 5 is a schematic structural diagram of a first network-side device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second network-side device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an anchor point transition processing apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an anchor point transition processing apparatus according to another embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an anchor point transition processing method according to an embodiment of the present invention includes:

step 101, transmitting first indication information of data transmission when a forwarded downlink data packet is transmitted to a second network side device and the original link data transmission is not stopped, wherein the first indication information comprises a starting sequence number SN allocated by the first network side device for the forwarded downlink data packet and a hyper frame number HFN corresponding to the starting sequence number SN;

step 102, sending second indication information of data transmission under the condition that the data transmission of the source link is stopped, wherein the second indication information is used for indicating the second network side equipment to perform anchor point switching.

Through the

above steps

101 and 102, the first network side device applying the method of the embodiment of the present invention, when transmitting the forwarded downlink data packet to the second network side device and not stopping the original link data transmission, will first send the first indication information related to the data transmission, where the first indication information includes the start SN of the forwarded downlink data packet and the HFN corresponding to the start SN; and then, under the condition of stopping the data transmission of the source link, further sending second indication information about the data transmission, and indicating the second network side equipment to carry out anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

The forwarded downlink data packet is a downlink data packet forwarded to the second network side device for caching, and may be all or part of a downlink data packet to be sent to the user device by the first network side device. Specifically, the data packet is data of a packet data convergence protocol PDCP service data unit SDU.

In this embodiment, in order to ensure that the forwarded downlink data packet is transmitted to the second network side device, optionally, before the step 101 sends the first indication information of data transmission, the method includes:

sending a transit address request message to the second network side equipment;

The first network side equipment sends a transfer address request message to the second network side equipment and initiates a request to the second network side equipment; and then, receiving the transit address fed back by the second network side equipment according to the request message. The transit address may be an IP address, a transport tunnel identifier, or the like.

Optionally, the method further comprises:

Here, the forwarding downlink data packet is sent according to the relay address fed back by the second network side device, and the downlink data is double-buffered. Specifically, the step of sending the forwarded downlink data packet may be before or after sending the first indication information. And after receiving the downstream data packet and the first indication information, the second network side device can start to process the forwarded downstream data packet, for example, encryption, header compression, and other operations. The second network-side device may also generate an uplink PDCP status report.

In addition, in this embodiment, optionally, the sending the forwarded downlink data packet to the second network side device includes:

The first network side equipment caches the forwarding downlink data packet to the second network side equipment through the GTP-U. And the SN is the serial number of each downlink data packet forwarded to the second network side device, can be placed at the extension head of the GTP-U, and corresponds to the downlink data packets in the GTP-U frame one by one.

In addition, in this embodiment, the first network-side device may determine that data transmission of the source link needs to be stopped according to an "end marker" from the core network, a wireless channel condition of the source link, or indication information from the second network-side device, and then send the second indication information to perform anchor point switching. Here, the anchor point switching is to re-allocate the SNs by the second network side device.

Therefore, optionally, the second indication information includes a starting value of the second network-side device to assign SNs.

In this way, the second network-side device may start the assignment based on the starting value of the SN. The start value of the SN indicated in the second indication information may be a cut-off SN of the forwarded downstream packet. For example, the SN corresponding to the forwarded downlink data packet is: 5. 6, 7 and 8, then SN ═ 5 is the start SN of the forwarded downlink packet, SN ═ 8 is the stop SN of the forwarded downlink packet, and the start value of SN that can be indicated by the second indication information is 8. Of course, the starting value of the SN assigned by the second network-side device indicated in the second indication information is not limited to the above manner, and may be the next SN to be cut off, and so on, and is not listed here.

In order to ensure effective transmission of data, optionally, the second indication information further includes at least one of the following information:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

If the second indication information includes the HFN corresponding to the initial value of the SN, the HFN in the first indication information may be combined to perform packet transmission calibration, packet loss determination, and the like. And the second indication information includes the SN of the out-of-order uplink data packet received by the first network side device and/or the HFN corresponding to the SN of the out-of-order uplink data packet, so that the out-of-order uplink data packet can be recorded, and the subsequent transmission is ensured to be complete.

Thus, optionally, after the sending the second indication information of the data transmission, the method further includes:

After sending the second indication information, the first network side device starts sending a new downlink data packet and/or an out-of-order uplink data packet, so that the second network side device allocates SNs to the new downlink data packet based on the starting value of the SNs indicated in the second indication information, and forwards the out-of-order uplink data packet to a new core network after completing the path conversion.

For example, if the initial value is 8, the SN of the new downlink packet is allocated from 8.

It should also be understood that the network side device in the embodiment of the present invention may be a base station eNB or a gNB, and may also be a device including a central unit control plane CU-CP and a central unit user plane CU-UP.

Here, for the first network-side device including the CU-CP and the CU-UP, in view of its functional implementation, before the first CU-CP sends the first indication information, it needs to initiate a first distribution count query to the first CU-UP to query the starting SN of the forwarded downlink packet and the HFN corresponding to the starting SN. Then, the starting SN of the forwarded downlink packet and the HFN corresponding to the starting SN are obtained through the corresponding feedback information (first distribution count information) of the first CU-UP. Specifically, the first CU-CP informs the first CU-UP through a UE context modification message, and initiates a first distribution counting query; the first CU-UP carries first allocation count Information, such as PDCP SN Status Information, in a bearer context modification response message.

Correspondingly, after receiving the first indication Information, the second network side device including the CU-CP and the CU-UP, the second CU-CP sends the starting SN of the forwarded downlink packet and the HFN corresponding thereto to the second CU-UP, for example, the second CU-CP carries PDCP SN Status Information in a bearer context modification message, where the PDCP SN Status Information includes the starting SN of the forwarded downlink packet and the HFN corresponding thereto.

Similarly, in this embodiment, optionally, before sending the second indication information of the data transmission, the method further includes:

Here, before the first CU-CP sends the second indication information, it needs to initiate a second allocation count query to the first CU-UP to query the current latest SN and the HFN corresponding thereto, so as to inform the second network-side device of the start value to which the SN is applicable. Then, the current latest SN and the HFN corresponding to it are known through the corresponding feedback information (second allocation count information) of the first CU-UP. Specifically, the first CU-CP informs the first CU-UP through a UE context modification message, and initiates a first distribution counting query; the first CU-UP carries second allocation count Information, such as PDCP SN Status Information, in a bearer context modification response message.

Correspondingly, after receiving the second indication Information, the second network-side device including the CU-CP and the CU-UP sends the start value of the SN carried by the second indication Information to the second CU-UP, for example, the second CU-CP carries PDCP SN Status Information in a bearer context modification message, where the PDCP SN Status Information includes the start value of the SN. Optionally, the second CU-CP also sends the HFN corresponding to the start value of the SN to the second CU-UP.

Next, an application of the embodiment of the present invention will be described with reference to fig. 2 and 3.

In scenario one, the network side device is a base station eNB or a gNB.

Step 1: the source base station (first network side device) requests the target base station (second network side device) for the relay address of the PDCP SDU through a relay address request message, such as a Data forwarding address request.

Step 2: and the target base station returns the corresponding transit address information.

And step 3: the source base station forwards all or part of the downlink PDCP SDU data (forwarded downlink data packets) to the target base station for buffering, namely, the downlink data is subjected to double buffering. The SN is the serial number of each downlink data packet forwarded to the target cell, is placed in an extension header of a GTP-U, corresponds to a downlink PDCP SDU in a GTP-U frame, and is sent to the target base station together.

And 4, step 4: the source base station sends the first indication information to the target base station through an SN status transfer (SN status transfer) message, which is a control plane message. The first indication information includes a start SN of the forwarded downlink packet and a hyper frame number HFN corresponding to the start SN. Optionally, the first indication information further includes uplink data reception status information of the source base station, for example: non-received uplink PDCP SN and corresponding HFN value.

And 5: after receiving, the target base station starts to process the downlink data packet, for example: ciphering, header compression, etc., and optionally, generating an uplink PDCP status report.

Step 6: and the source base station continuously sends downlink PDCP PDU data to the user equipment UE.

Step 6 a: and the target base station and the UE start data transmission.

And 7: the source base station judges that the data transmission of the source link needs to be stopped according to an end marker from a core network, the wireless channel condition of the source link, indication information from a target base station and the like; and sending second indication information to the target base station through an SN status transfer message, wherein the message is a control plane message. The second indication information includes a downlink data packet SN subsequently initiated by the target base station, and optionally, a corresponding HFN value, and optionally, an uplink data packet (out-of-order uplink data packet) SN received out-of-order and a corresponding HFN value.

And 8: and the source base station starts to forward the new downlink PDCP SDU to the target base station and/or forwards the uplink PDCP SDU received out of order to the target base station.

And step 9: after receiving, the target base station starts anchor point switching, namely starts to distribute new SN for the received new downlink PDCP SDU according to the second indication information. And storing the received out-of-order uplink data packet, and forwarding the out-of-order uplink data packet to a new core network path after completing the path conversion according to the new receiving condition.

And in the second scenario, the network side equipment is equipment comprising a CU-CP and a CU-UP.

Step 1: the source CU-CP (CU-CP of the first network side device) requests the destination CU-CP (CU-CP of the second network side device) for the relay address of the PDCP SDU through a relay address request message, such as a Data forwarding address request.

Step 2: and the target CU-CP returns corresponding transit address information.

And step 3: the source CU-CP informs the source CU-UP to initiate a first distribution counting query through a UE context modification message, and then the source CU-UP carries the PDCP SN Status Information in a bearer context modification response message to feed back the first distribution counting Information. The first allocation count information includes a start SN of the forwarded downlink packet and an HFN corresponding to the start SN. Then, the first indication information is sent to the target CU-CP through an SN status transfer message, which is a control plane message. The first indication information includes a start SN of the forwarded downlink packet and a hyper frame number HFN corresponding to the start SN. Optionally, the first indication information further includes uplink data reception status information of the source base station, for example: non-received uplink PDCP SN and corresponding HFN value. And then the target CU-CP carries the PDCP SN Status Information to the target CU-UP in a bearer context modification message, and informs the target CU-UP of the received first indication Information such as the starting SN and the HFN corresponding to the starting SN.

And 4, step 4: the source CU-UP forwards all or part of the downlink PDCP SDU data (forwarded downlink data packets) to the target CU-UP for buffering, namely, the downlink data is subjected to double buffering. Wherein, the SN is the serial number of each downlink data packet forwarded to the target cell, is placed in the extension header of the GTP-U, corresponds to the downlink PDCP SDU in the GTP-U frame, and is sent to the target CU-UP together.

And 5: after the target CU-UP will receive, it starts to process the downstream packet, for example: ciphering, header compression, etc., and optionally, generating an uplink PDCP status report.

Step 6: the source CU-UP continues to send downlink PDCP PDU data to the UE.

Step 6 a: the target CU-UP starts data transmission with the UE.

And 7: the source CU-CP judges that the data transmission of the source link needs to be stopped according to an end marker from a core network, the wireless channel condition of the source link, indication information from a target base station and the like; and initiating a second distribution counting query to the source CU-UP, wherein the source CU-UP carries PDCP SN Status Information in a bearer context modification response message and feeds back second distribution counting Information, and the second distribution counting Information comprises the current latest SN and the HFN corresponding to the current latest SN. The source CU-CP then sends second indication information to the target CU-CP via an SN status transfer message, which is a control plane message. The second indication information includes a downstream packet SN subsequently initiated by the target CU-CP, and optionally, a corresponding HFN value, and optionally, an upstream packet (out-of-order upstream packet) SN received out-of-order, and a corresponding HFN value. The target CU-CP carries PDCP SN Status Information to the target CU-UP in the bearer context modification message, and informs the target CU-UP of the received second indication Information such as the initial downlink data packet SN.

And 8: the source CU-UP starts to forward the new downlink PDCP SDU to the target base station, and/or forwards the uplink PDCP SDU received out of order to the target CU-UP.

And step 9: after receiving, the target CU-UP starts the anchor point conversion, namely starts to distribute new SN for the received new downlink PDCP SDU according to the second indication information. And storing the received out-of-order uplink data packet, and forwarding the out-of-order uplink data packet to a new core network path after completing the path conversion according to the new receiving condition.

To sum up, in the method of the embodiment of the present invention, when the first network-side device transmits the forwarded downlink data packet to the second network-side device and does not stop the original link data transmission, the first network-side device first sends the first indication information related to the data transmission, where the first indication information includes the start SN of the forwarded downlink data packet and the HFN corresponding to the start SN; and then, under the condition of stopping the data transmission of the source link, further sending second indication information about the data transmission, and indicating the second network side equipment to carry out anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

As shown in fig. 4, an embodiment of the present invention provides an anchor point switching processing method, which is applied to a second network device, and includes:

step 401, receiving a forwarded downlink data packet sent by a first network side device, and receiving first indication information of data transmission under the condition that original link data transmission is not stopped, where the first indication information includes a start sequence number SN allocated by the first network side device for the forwarded downlink data packet and a hyper frame number HFN corresponding to the start sequence number SN;

step 4012, receiving second indication information of data transmission when stopping data transmission of the source link, where the second indication information is used to indicate the second network-side device to perform anchor point switching.

Through the above steps, the second network side device first receives first indication information about data transmission when transmitting the forwarded downlink data packet to the second network side device and the original link data transmission is not stopped, where the first indication information includes a start SN of the forwarded downlink data packet and an HFN corresponding to the start SN; and then, in the case of stopping the data transmission of the source link, further receiving second indication information about the data transmission, and indicating the second network side equipment to perform anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

Here, after receiving the relay address request message sent by the first network side device, the relay address fed back according to the request message. The transit address may be an IP address, a transport tunnel identifier, or the like.

And then, the first network side equipment transmits the forwarded downlink data packet according to the relay address fed back by the second network side equipment, and performs double caching on the downlink data. Therefore, optionally, the method further comprises:

The processing of the forwarded downlink data packet may be operations such as encryption and header compression. The second network side device may also generate an uplink PDCP status report.

In the foregoing embodiment, it can be seen that the first network-side device may buffer the forwarded downlink data packet to the second network-side device through the GTP-U. Therefore, optionally, the receiving the forwarded downlink data packet sent by the first network side device includes:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

It should be understood that the method of this embodiment is implemented in cooperation with the method applied to the first network-side device, and the implementation manner in the embodiment of the method is applicable to this method, and the same technical effect can be achieved.

As shown in fig. 5, an embodiment of the present invention further provides a network-side device, where the network-side device is a first network-side device, and includes a transceiver 510, a memory 520, a processor 500, and a computer program stored in the memory 520 and executable on the processor 500; the processor 500, which is used to read the program in the memory 520, executes the following processes:

the transceiver 510 is configured to send first indication information of data transmission when transmitting a forwarded downlink data packet to a second network side device and the original link data transmission is not stopped, where the first indication information includes a start sequence number SN allocated by the first network side device to the forwarded downlink data packet and a hyper frame number HFN corresponding to the start sequence number SN;

The first network side equipment transmits first indication information about data transmission to second network side equipment when transmitting a forward-shifting downlink data packet to the second network side equipment and does not stop original link data transmission, wherein the first indication information comprises a starting SN of the forward-shifting downlink data packet and an HFN corresponding to the starting SN; and then, under the condition of stopping the data transmission of the source link, further sending second indication information about the data transmission, and indicating the second network side equipment to carry out anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

Optionally, the transceiver 510 is further configured to:

sending a transit address request message to the second network side equipment;

Optionally, the transceiver 510 is further configured to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the transceiver 510 is further configured to:

Optionally, the first central unit control plane initiates a second allocation count query to the first central unit user plane;

Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 500, and various circuits, represented by memory 520, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

The network side device provided by the embodiment of the present invention may execute the method embodiments described above, and the implementation principle and the technical effect are similar, which are not described herein again.

As shown in fig. 6, an embodiment of the present invention provides a network-side device, which is a second network-side device, and includes a transceiver 610, a memory 650, a processor 640, and a computer program stored in the memory 650 and executable on the processor 640; the processor 640 is used for reading the program in the memory 650 and executing the following processes:

the transceiver 610 is configured to receive first indication information of data transmission when receiving a forwarded downlink data packet sent by a first network side device and an original link data transmission is not stopped, where the first indication information includes a start sequence number SN and a hyper frame number HFN corresponding to the start sequence number SN, which are allocated to the forwarded downlink data packet by the first network side device;

The second network side equipment firstly receives first indication information about data transmission under the condition that the forwarding downlink data packet is transmitted to the second network side equipment and the original link data transmission is not stopped, wherein the first indication information comprises a starting SN of the forwarding downlink data packet and an HFN corresponding to the starting SN; and then, in the case of stopping the data transmission of the source link, further receiving second indication information about the data transmission, and indicating the second network side equipment to perform anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

Optionally, the transceiver 610 is further configured to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the transceiver 610 is further configured to:

Optionally, the processor 640 is configured to: if a new downlink data packet is received, distributing SN for the new downlink data packet according to the initial value in the second indication information;

the transceiver 610 is further configured to: and if the out-of-order uplink data packet is received, after the path conversion is completed, the out-of-order uplink data packet is sent to a core network.

Optionally, the second central unit control plane sends, to the second central unit user plane, a start value of an SN carried by the second indication information.

In fig. 6, a bus architecture (represented by bus 60), bus 600 may include any number of interconnected buses and bridges, and bus 600 links together various circuits including one or more processors, represented by processor 640, and memory, represented by memory 650. The bus 600 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 630 provides an interface between bus 600 and transceiver 610. The transceiver 610 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 640 is transmitted over a wireless medium via antenna 620, and further, antenna 620 receives data and transmits data to processor 640.

The processor 640 is responsible for managing the bus 600 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 650 may be used to store data used by processor 640 in performing operations.

Alternatively, processor 640 may be a CPU, ASIC, FPGA, or CPLD.

Because the principle of solving the problem of the network side device provided by the embodiment of the present invention is similar to the method in the embodiment of the present invention, the implementation of the network side device may refer to the implementation of the method, and the repeated parts are not described again.

As shown in fig. 7, an embodiment of the present invention provides a handover processing apparatus, applied to a first network device, including:

a first sending module 710, configured to send first indication information of data transmission when a forwarded downlink data packet is transmitted to a second network side device and original link data transmission is not stopped, where the first indication information includes a start sequence number SN allocated by the first network side device for the forwarded downlink data packet and a hyper frame number HFN corresponding to the start sequence number SN;

a second sending module 720, configured to send second indication information for data transmission when data transmission of a source link is stopped, where the second indication information is used to indicate the second network-side device to perform anchor point switching.

Optionally, the apparatus comprises:

a transit address request module, configured to send a transit address request message to the second network side device;

and the transit address receiving module is used for receiving the transit address fed back by the second network side equipment.

Optionally, the transferring further includes:

and the third sending module is used for sending the forwarded downlink data packet to the second network side device according to the transit address.

Optionally, the third sending module is further configured to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the apparatus further comprises:

and the fourth sending module is used for sending the new downlink data packet and/or the out-of-order uplink data packet to the second network side equipment.

The device transmits first indication information about data transmission under the condition that a forwarding downlink data packet is transmitted to second network side equipment and original link data transmission is not stopped, wherein the first indication information comprises a starting SN of the forwarding downlink data packet and an HFN corresponding to the starting SN; and then, under the condition of stopping the data transmission of the source link, further sending second indication information about the data transmission, and indicating the second network side equipment to carry out anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

It should be noted that, the apparatus is an apparatus to which the above-described anchor point transition processing method applied to the first network-side device is applied, and the implementation manner of the embodiment of the method is applied to the apparatus, and the same technical effect can be achieved.

As shown in fig. 8, an embodiment of the present invention provides a handover processing apparatus, applied to a second network device, including:

a first receiving module 810, configured to receive first indication information of data transmission when receiving a forwarded downlink data packet sent by a first network side device and an original link data transmission is not stopped, where the first indication information includes a start sequence number SN allocated by the first network side device for the forwarded downlink data packet and a hyper frame number HFN corresponding to the start sequence number SN;

a second receiving module 820, configured to receive second indication information for data transmission when data transmission of a source link is stopped, where the second indication information is used to indicate the second network-side device to perform anchor point switching.

Optionally, the apparatus further comprises:

a transit address request receiving module, configured to receive a transit address request message sent by the first network side device;

and the relay address request feedback module is used for feeding back the relay address of the forwarded downlink data packet to the first network side device according to the relay address request message.

Optionally, the apparatus further comprises:

and the first processing module is used for receiving the forwarding downlink data packet sent by the first network side equipment according to the transit address and processing the forwarding data packet.

Optionally, the first processing module is further configured to:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

Optionally, the apparatus further comprises:

and the fourth receiving module is used for receiving a new downlink data packet and/or an out-of-order uplink data packet sent by the first network side device.

Optionally, the apparatus further comprises:

the second processing module is used for distributing SN to a new downlink data packet according to an initial value in the second indication information if the new downlink data packet is received;

and the third processing module is used for sending the out-of-order uplink data packet to the core network after the path conversion is finished if the out-of-order uplink data packet is received.

The device, under the condition of transmitting the forward-shifting downlink data packet to the second network side equipment and not stopping the original link data transmission, will receive the first indication information about the data transmission first, the first indication information includes the initial SN of the forward-shifting downlink data packet and the HFN corresponding to the initial SN; and then, in the case of stopping the data transmission of the source link, further receiving second indication information about the data transmission, and indicating the second network side equipment to perform anchor point switching. Therefore, through the transmission of the indication information twice, before the anchor point switching, the second network side equipment can process the forwarded downlink data packet based on the first indication information, thereby avoiding the data interruption during the network switching and achieving the purpose of improving the mobility performance of the system.

It should be noted that, the apparatus is an apparatus to which the above-described anchor point transition processing method applied to the second network-side device is applied, and the implementation manner of the embodiment of the method is applied to the apparatus, and the same technical effect can be achieved.

Another embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the anchor point transition processing method as applied to the first network-side device or the anchor point transition processing method as applied to the second network-side device.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It is further noted that many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

The exemplary embodiments described above are described with reference to the drawings, and many different forms and embodiments of the invention may be made without departing from the spirit and teaching of the invention, therefore, the invention is not to be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of elements may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.

While the foregoing is directed to the preferred embodiment of the present invention, 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 appended claims.

Claims

1. An anchor point switching processing method is applied to a first network side device, and is characterized by comprising the following steps:

2. The method of claim 1, wherein before sending the first indication of the data transmission, comprising:

sending a transit address request message to the second network side equipment;

3. The method of claim 2, further comprising:

4. The method according to claim 3, wherein said sending said forwarded downstream packet to said second network side device comprises:

5. The method according to claim 1, wherein the first indication information further includes uplink data reception status information of the first network-side device.

6. The method of claim 5, wherein the uplink data reception status information comprises: and/or the HFN corresponding to the SN of the data packet which is not received by the uplink.

7. The method of claim 1, wherein the second indication information comprises a starting value of the second network-side device assignment SN.

8. The method of claim 7, wherein the second indication information further comprises at least one of:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

9. The method of claim 1, wherein after sending the second indication of the data transmission, further comprising:

10. The method of claim 1, wherein the first network-side device comprises: a first central unit control plane and a first central unit user plane;

11. The method of claim 10, wherein before sending the second indication of the data transmission, further comprising:

12. An anchor point switching processing method is applied to a second network side device, and is characterized by comprising the following steps:

13. The method of claim 12, wherein the receiving the first indication of the data transmission is preceded by:

14. The method of claim 13, further comprising:

15. The method according to claim 14, wherein said receiving the forwarded downlink packet sent by the first network-side device comprises:

16. The method according to claim 12, wherein the first indication information further includes uplink data reception status information of the first network-side device.

17. The method of claim 16, wherein the uplink data reception status information comprises: and/or the HFN corresponding to the SN of the data packet which is not received by the uplink.

18. The method of claim 12, wherein the second indication information comprises a starting value of the second network-side device assigning SN.

19. The method of claim 18, wherein the second indication information further comprises at least one of:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

20. The method of claim 12, wherein after receiving the second indication of the data transmission, further comprising:

21. The method according to claim 20, wherein after receiving the new downlink data packet and/or the out-of-order uplink data packet sent by the first network-side device, the method further includes:

22. The method of claim 12, wherein the second network-side device comprises: a second central unit control plane and a second central unit user plane;

23. The method of claim 22, wherein after receiving the second indication of the data transmission, further comprising:

24. A network side device is a first network side device and comprises a transceiver, a memory, a processor and a computer program which is stored on the memory and can run on the processor; wherein the transceiver is configured to:

25. The network-side device of claim 24, wherein the first indication information further includes uplink data reception status information of the first network-side device.

26. The network-side device of claim 24, wherein the second indication information comprises a starting value of the SN assigned by the second network-side device.

27. The network-side device of claim 26, wherein the second indication information further comprises at least one of the following information:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

28. The network-side device of claim 24, wherein the transceiver is further configured to:

29. A network side device is a second network side device and comprises a transceiver, a memory, a processor and a computer program which is stored on the memory and can run on the processor; wherein the transceiver is configured to:

30. The network-side device of claim 29, wherein the first indication information further includes uplink data reception status information of the first network-side device.

31. The network-side device of claim 29, wherein the second indication information comprises a starting value of the SN assigned by the second network-side device.

32. The network-side device of claim 31, wherein the second indication information further comprises at least one of the following information:

an HFN corresponding to a starting value of the SN;

and the HFN corresponds to the SN of the out-of-order uplink data packet.

33. The network-side device of claim 29, wherein the transceiver is further configured to:

34. The network-side device of claim 33,

the processor is configured to: if a new downlink data packet is received, distributing SN for the new downlink data packet according to the initial value in the second indication information;

35. A switching processing device applied to a first network side device includes:

36. A switching processing device applied to a second network side device includes:

37. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the anchor point transition processing method according to any one of claims 1 to 11 or the steps in the anchor point transition processing method according to any one of claims 12 to 23.