CN115412986A

CN115412986A - Data forwarding method, system, equipment and storage medium based on terminal indication

Info

Publication number: CN115412986A
Application number: CN202211066963.2A
Authority: CN
Inventors: 杨智斌; 李路鹏; 李洋; 黄韬
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-11-29

Abstract

The invention provides a data forwarding method, a system, equipment and a storage medium based on terminal indication, wherein the method comprises the following steps: the terminal feeds back indication condition switching completion information to the source access point according to the indication condition switching request; when the terminal judges that the target access point meets the switching condition, an indication data forwarding request is sent to the source access point; the source access point sends an early state transition request to the target access point; and the source access point sends the information indicating the condition switching completion and forwards the user downlink data to the target access point. The method and the device can send the instruction for starting data forwarding to the source cell before the terminal synchronizes to the new cell, avoid unnecessary data forwarding, greatly reduce the data forwarding amount and reduce the network transmission load.

Description

Data forwarding method, system, equipment and storage medium based on terminal indication

Technical Field

The present invention relates to the field of communications, and in particular, to a method, a system, a device, and a storage medium for data forwarding based on a terminal indication.

Background

In a mobile communication system, when a user using network service moves from one cell to another cell, or due to radio transmission, adjustment of traffic load, activation of operation maintenance, equipment failure, etc., the system transfers the communication link between the user and the original cell to a new cell in order to ensure the continuity of communication and the quality of service. This is "handover", and "handover" Conditional Handover (CHO) for short is defined as a handover performed by a UE (user equipment) when one or more handover performing conditions are met.

Fig. 1 is a schematic diagram of an implementation process of a data forwarding method based on terminal indication in the prior art. As shown in fig. 1, in a Conditional Handover (CHO) function in the prior art, after a network instructs a terminal to autonomously perform Conditional Handover, downlink data to be forwarded is continuously forwarded from a source access point to a target access point. When the terminal and the source access point are normally connected, most forwarded downlink data is actually successfully received by the terminal, and therefore, the forwarding of the data is unnecessary. If the duration from the network indication to the terminal handover is long, a large amount of meaningless data forwarding will be caused. Taking 5G NR as an example, the conventional conditional handover process may start data forwarding too early, and when the actual handover time of the terminal is late, too much meaningless data forwarding before the actual handover is caused, and the amount of forwarded data is large, and a part of the process is as shown in fig. 1.

For example: when the UE maintains a connection with a source eNB (evolved base station) after receiving the CHO configuration and starts evaluating CHO execution conditions of the CHO candidate cell, and executes an HO command (RRC message, radio Resource Control, RRC, i.e., radio Resource management message) when the execution conditions of the CHO candidate cell are satisfied. To improve robustness, the network may provide the UE with a maximum of 8 candidate cell configurations associated with the execution conditions. If at least one CHO candidate cell satisfies the respective CHO performing conditions, the UE detaches from the source eNB, applies the stored respective configuration for the candidate cell and synchronizes to the candidate cell. Once the handover is triggered, the UE stops evaluating the execution conditions of the other candidate cells. The UE accesses the target eNB and completes the handover procedure by transmitting an RRC Connection Reconfiguration Complete message (RRC Connection Reconfiguration Complete message) to the target eNB. After successful completion of the RRC handover procedure, the UE releases the stored CHO configuration.

When the initial CHO execution attempt fails or the handover fails, if the network configures the UE to attempt the CHO after the handover fails and the UE performs cell selection on a CHO candidate cell, the UE attempts to perform the CHO on the cell; otherwise, RRC reestablishment is performed.

In view of this, the present invention provides a data forwarding method, system, device and storage medium based on terminal indication.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the invention and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a data forwarding method, a system, equipment and a storage medium based on terminal indication, which overcome the difficulty in the prior art, can send an indication for starting data forwarding to a source cell before a terminal synchronizes to a new cell, avoids unnecessary data forwarding, greatly reduces the data forwarding amount and reduces the network transmission load.

The embodiment of the invention provides a data forwarding method based on terminal indication, which comprises the following steps:

the terminal feeds back indication condition switching completion information to the source access point according to the indication condition switching request;

when the terminal judges that the target access point meets the switching condition, sending an indication data forwarding request to the source access point;

the source access point sends an early state transition request to the target access point;

and the source access point sends information indicating condition switching completion and forwards user downlink data to the target access point.

Preferably, the sending, when the terminal determines that the target access point satisfies the handover condition, an indication data forwarding request to the source access point includes:

and the terminal judges whether the target access point meets the switching condition, if so, the terminal adds the indication data forwarding request to the control information of the packet data fusion protocol layer and sends the control information of the packet data fusion protocol layer to the source access point, and if not, the terminal finishes the process.

Preferably, when the terminal determines that the target access point satisfies the handover condition, the method further includes sending an indication data forwarding request to the source access point:

when the source access point receives a data packet sequence number corresponding to a first protocol data unit type from a user, starting a timer;

counting and receiving complete indication data forwarding request information of the data radio bearer of the user, and comparing the used time with a preset time threshold;

if the used time is less than a preset time threshold, generating an early state transfer request according to the grouped data fusion protocol layer type information;

and if the time of the timer is more than or equal to a preset time length threshold, generating an early state transfer request according to a first unacknowledged data packet sequence number in a packet data convergence protocol data unit received by each data radio bearer at the latest.

Preferably, the adding the indication data forwarding request to the packet data convergence protocol layer control information further includes:

and adding the indication data forwarding request by extending a data packet sequence number corresponding to the packet data convergence protocol layer type.

Preferably, the sending the packet data convergence protocol layer control information to the source access point further includes:

and the control information of the grouped data fusion protocol layer is sent in granularity according to each data radio bearer.

Preferably, the sending, by the source access point, information indicating completion of conditional handover and forwarding downlink data of the user to the target access point includes:

the source access point forwards user downlink data of a first data radio bearer to the target access point;

the terminal sends indication condition switching completion information to a target access point;

and the source access point sends the user downlink data of the rest data radio bearer to the target access point.

Preferably, the terminal feeding back the indication condition switching completion information to the source access point according to the indication condition switching request includes:

a terminal receives an instruction condition switching request sent by a source access point;

and the terminal sends the information indicating the condition switching completion to the source access point.

The embodiment of the present invention further provides a data forwarding system based on terminal indication, which is used for implementing the data forwarding method based on terminal indication, and the data forwarding system based on terminal indication includes:

the terminal feeds back the information of finishing the switching of the indication conditions to the source access point according to the request of switching the indication conditions;

the forwarding request module is used for sending an indication data forwarding request to the source access point when the terminal judges that the target access point meets the switching condition;

an early state module to send an early state transition request to the target access point by the source access point;

and the data forwarding module is used for sending the information indicating the completion of the condition switching by the source access point and forwarding the user downlink data to the target access point.

The embodiment of the invention also provides a data forwarding device based on the terminal indication, which comprises:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the above terminal indication-based data forwarding method via execution of the executable instructions.

An embodiment of the present invention further provides a computer-readable storage medium for storing a program, where the program is executed to implement the steps of the above-mentioned data forwarding method based on terminal indication.

The invention aims to provide a data forwarding method, a system, equipment and a storage medium based on terminal indication, which can send a data forwarding starting indication to a source cell before a terminal synchronizes to a new cell, avoid unnecessary data forwarding, greatly reduce data forwarding amount and reduce network transmission load.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments thereof, with reference to the following drawings.

Fig. 1 is a schematic diagram of an implementation process of a data forwarding method based on terminal indication in the prior art.

Fig. 2 is a flowchart of a data forwarding method based on terminal indication according to the present invention.

Fig. 3 is a flowchart illustrating step S110 in an embodiment of the data forwarding method based on terminal indication according to the present invention.

Fig. 4 is a flowchart illustrating step S120 in an embodiment of the data forwarding method based on terminal indication according to the present invention.

Fig. 5 is a flowchart illustrating step S140 in an embodiment of the data forwarding method based on terminal indication according to the present invention.

Fig. 6 is a schematic diagram of an implementation process of the data forwarding method based on terminal indication according to the present invention.

Fig. 7 is a data unit structure diagram of a packet data convergence protocol layer in the data forwarding method based on terminal indication according to the present invention.

Fig. 8 is an expanded schematic diagram of a data unit of a packet data convergence protocol layer in the data forwarding method based on the terminal indication according to the present invention.

Fig. 9 is a block diagram of a data forwarding system based on terminal indication according to the present invention.

Fig. 10 is a schematic block diagram of a handover request module in the data forwarding system based on terminal indication according to the present invention.

Fig. 11 is a schematic block diagram of a forward request module in the data forwarding system based on terminal indication according to the present invention.

Fig. 12 is a schematic block diagram of a data forwarding module in the data forwarding system based on the terminal indication according to the present invention.

Fig. 13 is a schematic diagram of a data forwarding apparatus based on terminal indication according to the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

Reference in the specification to "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics illustrated may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples presented herein can be combined and combined by those skilled in the art without being mutually inconsistent.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the present presentation, "a plurality" means two or more unless specifically defined otherwise.

In order to clearly explain the present invention, components that are not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

Throughout the specification, when a device is referred to as being "connected" to another device, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another element interposed therebetween. In addition, when a device "includes" a certain component, unless otherwise stated, the device does not exclude other components, but may include other components.

When a device is said to be "on" another device, this may be directly on the other device, but may also be accompanied by other devices in between. When a device is said to be "directly on" another device, there are no other devices in between.

Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface are represented. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" include plural forms as long as the words do not expressly indicate a contrary meaning. The term "comprises/comprising" when used in this specification is taken to specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and/or components.

Although not defined differently, including technical and scientific terms used herein, all have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries are to be additionally interpreted as having meanings consistent with those of related art documents and the contents of the present prompts, and must not be excessively interpreted as having ideal or very formulaic meanings unless defined.

Fig. 2 is a flowchart of a data forwarding method based on terminal indication according to the present invention. As shown in fig. 2, the present invention relates to the field of network configuration, and is a method for data forwarding based on terminal indication, and the flow of the present invention includes:

and S110, the terminal feeds back the information of finishing the instruction condition switching to the source access point according to the instruction condition switching request. In this embodiment, when a terminal (UE) enters an RRC Connected state in a 5G (NR) network, it moves from one gNB (communication base station) to another gNB (communication base station), and moves to another coverage area of the gNB all the time through a handover procedure, and the source access point and the target access point may be two communication base stations in different locations.

And S120, when the terminal judges that the target access point meets the switching condition, sending an indication data forwarding request to the source access point. The handover condition in this embodiment is, for example, signal strength, signal-to-noise ratio, and other communication parameters to determine the quality of the current link and determine whether a handover to the signal of the wireless extender is required. The determination conditions at the time of handover are different for different wireless terminals.

S130, the source access point sends an early state transition request to the target access point.

S140, the source access point sends the information indicating the condition switching completion and forwards the user downlink data to the target access point.

Aiming at the problems in the prior art, the invention provides a data forwarding method based on terminal indication in condition switching, aiming at reducing the forwarding of meaningless data so as to reduce the network transmission load. The data forwarding method based on the terminal indication mainly comprises the following steps: after the network indicates the terminal to autonomously execute the condition switching, the method proposes that before the terminal is synchronized to a new cell, an instruction for starting data forwarding is sent to a source cell through PDCP layer control information, so that unnecessary data forwarding is avoided.

Fig. 3 is a flowchart of step S110 in the embodiment of the data forwarding method based on terminal indication in the present invention. Fig. 4 is a flowchart illustrating step S120 in an embodiment of the data forwarding method based on terminal indication according to the present invention. Fig. 5 is a flowchart illustrating step S140 in an embodiment of the data forwarding method based on terminal indication according to the present invention. As shown in fig. 3 to 5, in the embodiment of fig. 1, step S110 is replaced by steps S111 and S112 on the basis of steps S110, S120, S130 and S140. Step S120 is replaced by S121, S122, S123, S124, S125, S126, S127. By replacing step S140 with S141, S142, and S143, each step will be described below:

and S111, the terminal receives the instruction condition switching request sent by the source access point.

And S112, the terminal sends the information indicating the completion of the condition switching to the source access point.

And S121, the terminal judges whether the target access point meets the switching condition, if so, the step S122 is executed, and if not, the process is ended.

And S122, adding the indication data forwarding request to the control information of the grouped data fusion protocol layer, and adding the indication data forwarding request by expanding the sequence number of the data packet corresponding to the type of the grouped data fusion protocol layer.

And S123, sending the control information of the grouped data convergence protocol layer to the source access point, wherein the control information of the grouped data convergence protocol layer is sent in granularity according to each data radio bearer. The DRB (data radio bearer-data radio bearer) of the radio network Access (AS) layer is responsible for the handling of data packets in the radio interface (Uu). In a 5G (NR) wireless network, a user DRB (user Data Bearer) is responsible for providing the same packet forwarding process for (user) packets. QoS flows mapped to DRBs by the gNB in the wireless network are based on QFI and related QoS profiles (i.e., qoS parameters and characteristics).

And S124, when the source access point receives the data packet serial number corresponding to the first protocol data unit type from the user, starting a timer.

And S125, when receiving the complete indication data forwarding request information of the data radio bearer of the user, comparing the used time with a preset time length threshold value.

And S126, if the used time is less than the preset time threshold, generating an early state transfer request according to the type information of the grouped data fusion protocol layer.

And S127, if the time of the timer is greater than or equal to the preset time length threshold, generating an early state transfer request according to the latest received first unacknowledged data packet serial number in the packet data convergence protocol data unit by each data radio bearer. The PDCP is an abbreviation for packet data convergence protocol. It is a radio transport protocol stack in UMTS that is responsible for compressing and decompressing IP headers, transporting user data, and maintaining sequence numbers of radio bearers set for lossless radio network service subsystems (SRNS). A Packet Data Convergence Protocol (PDCP) layer belongs to the second layer of the radio interface Protocol stack, and processes radio resource management (RRC) messages on the control plane and Internet Protocol (IP) packets on the user plane. On the user plane, after the PDCP sublayer obtains IP data packets from the upper layer, the IP data packets may be header compressed and ciphered and then delivered to the RLC sublayer. The PDCP sublayer also provides in-order commit and duplicate packet detection functions to the upper layers. In the control plane, the PDCP sublayer provides signaling transport services for the upper RRC layer, and implements ciphering and consistency protection of RRC signaling, and implements deciphering and consistency checking of RRC signaling in the reverse direction.

S141, the source access point forwards the user downlink data of the first data radio bearer to the target access point.

S142, the terminal sends the information indicating the completion of the condition switching to the target access point.

And S143, the source access point sends the user downlink data of the rest data radio bearer to the target access point.

Fig. 6 is a schematic diagram of an implementation process of the data forwarding method based on terminal indication according to the present invention. Fig. 7 is a data unit structure diagram of a packet data convergence protocol layer in the data forwarding method based on terminal indication according to the present invention. Fig. 8 is an expanded schematic diagram of a data unit of a packet data convergence protocol layer in the data forwarding method based on the terminal indication according to the present invention. As shown in fig. 6 to 8, the present invention introduces a terminal to instruct a source access point to start a data forwarding function. The terminal sends the indication before synchronizing to the new cell, and the source access point starts data forwarding at the moment, so that the time and the data volume for data forwarding are reduced.

Referring to fig. 7, the terminal uses PDCP layer control information: PDCP Control PDU conveys indication information, where D/C =0, i.e., control PDU. PDU Type =010, indicating initiation of data forwarding. Here, the extension is made on the original reserved PDU Type, and other values than "010" may be used without loss of generality. FMC: the first not yet acknowledged PDCP data packet sequence number. Wherein, the Packet Data Unit is a protocol Data Unit. In a layered network architecture, such as the Open Systems Interconnection (OSI) model, protocol Data Units (PDUs) are established at each layer of the transport system. The PDU contains information from the upper layer and information attached to the entity of the current layer. This PDU is then passed to the next lower layer. The physical layer actually transmits these PDUs in a framed bitstream, but these PDUs are built by the higher layers of the protocol stack. The receiving system passes these packets from bottom to top through the protocol stack and separates out the relevant information in the PDUs at each layer of the protocol stack. It is important that the information attached to the PDU by each layer is destined for the peer layer of another system. This is how the peer layer coordinates a communication session.

Referring to fig. 8, the PDCP layer control information is transmitted with granularity of Data Radio Bearer (DRB). When the source access point receives a PDCP Control PDU with a first PDU Type =010 of a certain user, a timer is started, timing is T, and the timeout duration is T _ max.

When receiving PDCP Control PDUs with PDU Type =010 of all DRBs of the user, if T < T _ max, generating an EARLY STATUS TRANSFER message according to the information, and starting a subsequent process.

When T is more than or equal to T _ max and no PDCP Control PDU with PDU Type =010 is received from all DRBs of the user, an EARLY STATUS TRANSFER message (EARLY STATUS TRANSFER request) is generated according to the FMC in the PDCP Control PDU with PDU Type =000 received latest by each DRB, and the subsequent process is started.

In this embodiment, taking 5G NR as an example, it is assumed that 2 Qos flows, 5qi =5 and 9 are already established and are mapped to 2 DRBs, DRB1 and DRB2, respectively. The timeout period is 50ms.

The method of the invention is implemented as follows:

step 1, the original access point (first gNB) sends an instruction condition switching request to a terminal (UE).

And step 2, the terminal (UE) feeds back the information indicating the condition switching completion to the original access point.

And 3, judging the quality of the current link by the terminal (UE) according to the signal strength, the signal to noise ratio and other communication parameters of the target access point (second gNB), and determining whether the signal needs to be switched to the wireless expander or not. When the target access point (second gNB) meets the preset switching condition, the terminal (UE) adds the indication data forwarding request to the control information of the grouped data fusion protocol layer, and adds the indication data forwarding request to forward to the original access point by expanding the data packet serial number corresponding to the type of the grouped data fusion protocol layer. The terminal instructs data forwarding of DRB1, and the terminal also instructs data forwarding of DRB2. If the indication is received within 50ms, a corresponding EARLY STATUS TRANSFER message is generated. Otherwise, generating an EARLY STATUS TRANSFER message according to the FMC in the PDCP Control PDU with the PDU Type =000 received latest by the DRB2.

And 4, the original access point sends an early state transition request to the target access point according to the indication data forwarding request.

And 5, the source access point forwards the user downlink data of the first data radio bearer to the target access point.

And 6, the terminal sends the information indicating the completion of the condition switching to the target access point.

And 7, the source access point sends the user downlink data of the rest data radio bearer to the target access point, so that the data of the

DRBs

1 and 2 are forwarded and the switching is executed.

The method provided by the invention innovatively provides that the indication for starting data forwarding is sent to the source cell before the terminal is synchronized to the new cell, so that unnecessary data forwarding is avoided, and for example, in LTE/NR, the data forwarding amount of an X2/Xn port can be greatly reduced.

After the network indicates the terminal to autonomously execute the condition switching, the network sends the instruction of starting data forwarding to the source cell through the PDCP layer control information before the terminal is synchronized to the new cell. Extending over the original reserved PDU Type, using PDU Type =010 to indicate initiation of data forwarding. The source access point starts a timer after receiving a PDCP Control PDU of the first PDU Type =010 of a certain user. And when the PDCP Control PDU with the PDU Type =010 of all the DRBs of the user is received before the timer is overtime, generating an EARLY STATUS TRANSFER message (EARLY state TRANSFER request) according to the information. And when the timer is overtime and the PDCP Control PDUs with the PDU Type =010 of all the DRBs of the user are not received, generating an EARLY STATUS TRANSFER message (EARLY state transition request) according to the FMC in the PDCP Control PDU with the PDU Type =000 received by each DRB at the latest.

Fig. 9 is a block diagram of a data forwarding system based on terminal indication according to the present invention. As shown in fig. 9, the data forwarding system based on terminal indication of the present invention includes, but is not limited to:

and a switching request module 51, which feeds back the information of finishing the switching of the indication condition to the source access point according to the request of indicating the switching of the condition.

The forwarding request module 52, when the terminal determines that the target access point meets the handover condition, sends an indication data forwarding request to the source access point.

The early state module 53 sends an early state transition request to the target access point.

And the data forwarding module 54 sends information indicating condition switching completion to the source access point and forwards downlink data of the user to the target access point.

The implementation principle of the above module is referred to in the related introduction of the data forwarding method based on the terminal indication, and is not described herein again.

The data forwarding system based on the terminal indication can send the indication for starting data forwarding to the source cell before the terminal synchronizes to the new cell, avoids unnecessary data forwarding, greatly reduces the data forwarding amount and reduces the network transmission load.

Fig. 10 is a schematic block diagram of a handover request module in the data forwarding system based on terminal indication according to the present invention. Fig. 11 is a schematic block diagram of a request forwarding module in the data forwarding system based on terminal indication according to the present invention. Fig. 12 is a schematic block diagram of a data forwarding module in the data forwarding system based on terminal indication according to the present invention. Fig. 10 to 12 show that, on the basis of the embodiment of the apparatus in fig. 9, the data forwarding system based on terminal indication of the present invention replaces the switching request module 51 with the conditional switching module 511 and the indication condition module 512. The forwarding request module 52 is replaced by a switching judgment module 521, an addition indication module 522, an information sending module 523, a timing starting module 524, a time length comparison module 525, a first request module 526, and a second request module 527. The data forwarding module 54 is replaced by a first forwarding module 541, a handover completion module 542 and a second forwarding module 543. The following is described for each module:

the conditional switching module 511 receives the request for instructing conditional switching sent by the source access point.

And an indication condition module 512, which sends the information indicating the condition switching completion to the source access point.

A handover determination module 521 configured to determine whether the terminal determines that the target access point satisfies the handover condition

And an adding indication module 522 configured to add the indication data forwarding request to the packet data convergence protocol layer control information when the handover condition is satisfied, and add the indication data forwarding request by extending the packet data sequence number corresponding to the packet data convergence protocol layer type.

The information sending module 523 is configured to send the packet data convergence protocol layer control information to the source access point, where the packet data convergence protocol layer control information is sent in granularity according to each data radio bearer.

A timer starting module 524, configured to start a timer when the source access point receives the data packet sequence number corresponding to the first pdu type from the user.

And a duration comparison module 525 configured to compare the time used for counting the received complete indication data forwarding request information of the data radio bearer of the user with a preset duration threshold.

A first request module 526 configured to generate an early state transition request according to the pdp layer type information if the elapsed time is less than a preset duration threshold.

A second request module 527 configured to, if the time of the timer is greater than or equal to the preset time threshold, generate an early state transition request according to the first unacknowledged packet sequence number in the packet data convergence protocol data unit received by each data radio bearer at the latest.

The early state module 53, the source access point sends an early state transition request to the target access point.

The first forwarding module 541 forwards, by the source access point, the user downlink data of the first data radio bearer to the target access point.

The handover complete module 542, the terminal sends the information indicating the completion of the conditional handover to the target access point.

The second forwarding module 543, the source access point sends the user downlink data of the remaining data radio bearer to the target access point.

The implementation principle of the above steps is referred to the related introduction in the data forwarding method based on the terminal indication, and is not described herein again.

The embodiment of the invention also provides data forwarding equipment based on the terminal indication, which comprises a processor. A memory having stored therein executable instructions of the processor. Wherein the processor is configured to perform the steps of the terminal indication based data forwarding method via execution of executable instructions.

As shown above, the data forwarding system based on the terminal indication in the embodiment of the present invention can send the indication of starting data forwarding to the source cell before the terminal synchronizes to the new cell, thereby avoiding unnecessary data forwarding, greatly reducing the data forwarding amount, and reducing the network transmission load.

As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" platform.

Fig. 13 is a schematic diagram of a data forwarding apparatus based on terminal indication according to the present invention. An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 13. The electronic device 600 shown in fig. 13 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.

As shown in fig. 13, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one memory unit 620, a bus 630 connecting the different platform components (including the memory unit 620 and the processing unit 610), a display unit 640, etc.

Wherein the storage unit stores program code executable by the processing unit 610 to cause the processing unit 610 to perform steps according to various exemplary embodiments of the present invention described in the above-mentioned electronic prescription flow processing method section of the present specification. For example, processing unit 610 may perform the steps as shown in fig. 1.

The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM) 6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.

The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: a processing system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.

Bus 630 may be one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.

The embodiment of the invention also provides a computer readable storage medium for storing the program, and the steps of the data forwarding method based on the terminal indication are realized when the program is executed. In some possible embodiments, the aspects of the present invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present invention described in the above-mentioned electronic prescription flow processing method section of this specification, when the program product is run on the terminal device.

The program product 800 for implementing the above method according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this respect, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out processes of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).

In summary, an object of the present invention is to provide a data forwarding method, system, device and storage medium based on a terminal instruction, which can send an instruction to start data forwarding to a source cell before a terminal synchronizes to a new cell, so as to avoid unnecessary data forwarding, greatly reduce data forwarding amount, and reduce network transmission load.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.

Claims

1. A data forwarding method based on terminal indication is characterized by comprising the following steps:

2. The terminal indication-based data forwarding method of claim 1, wherein: when the terminal judges that the target access point meets the switching condition, the step of sending an indication data forwarding request to the source access point comprises the following steps:

3. The terminal indication-based data forwarding method of claim 2, wherein: when the terminal judges that the target access point meets the switching condition, the terminal sends an indication data forwarding request to the source access point, and the method further comprises the following steps:

when the source access point receives a data packet serial number corresponding to a first protocol data unit type from a user, starting a timer;

if the used time is less than a preset time threshold, generating an early state transfer request according to the type information of the grouped data fusion protocol layer;

and if the time of the timer is more than or equal to a preset time length threshold, generating an early state transfer request according to the latest received first unacknowledged data packet sequence number in the packet data convergence protocol data unit by each data radio bearer.

4. The terminal indication-based data forwarding method of claim 2, wherein: the adding the indication data forwarding request to the control information of the packet data convergence protocol layer further comprises:

5. The terminal indication-based data forwarding method of claim 2, wherein: the sending the packet data convergence protocol layer control information to the source access point further comprises:

and the grouped data fusion protocol layer control information is sent in granularity according to each data radio bearer.

6. The data forwarding method based on terminal indication according to claim 1, wherein the source access point sends information indicating the completion of conditional handover and forwards user downlink data to the target access point, comprising:

7. The terminal indication-based data forwarding method of claim 1, wherein the terminal feeds back indication condition switching completion information to the source access point according to the indication condition switching request, and the method comprises:

the terminal sends information indicating the completion of the conditional switch to the source access point.

8. A data forwarding method based on terminal indication is characterized by comprising the following steps:

9. A data forwarding device based on a terminal indication, comprising:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the terminal indication based data forwarding method of any one of claims 1 to 7 via execution of the executable instructions.

10. A computer-readable storage medium for storing a program, wherein the program, when executed by a processor, implements the steps of the terminal indication-based data forwarding method of any one of claims 1 to 7.