CN109150749B

CN109150749B - Data sending method and related equipment

Info

Publication number: CN109150749B
Application number: CN201710459594.6A
Authority: CN
Inventors: 韩锋; 晋英豪; 谭巍
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-16
Filing date: 2017-06-16
Publication date: 2022-03-11
Anticipated expiration: 2037-06-16
Also published as: CN109150749A

Abstract

The embodiment of the invention discloses a data sending method and related equipment, wherein the method can comprise the following steps: the method comprises the steps that network equipment generates a first downlink control signaling, wherein the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used for indicating terminal equipment to close or open a reflection QoS function; and the network equipment sends the first downlink control signaling to the terminal equipment through a first Data Radio Bearer (DRB). The embodiment of the invention can solve the problem in the prior art that how to effectively close the current reflection QoS function under the condition that the terminal equipment does not receive the downlink data packet again.

Description

Data sending method and related equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission device and a related device.

Background

When the network is congested, all data flows may be discarded, and in order to meet the requirements of users for different application with different service qualities, the network needs to allocate and schedule resources according to the requirements of the users, so as to provide different service qualities for different data flows. For example, data packets with strong real-time performance and importance are processed first, and ordinary data packets with weak real-time performance are provided with lower processing priority, and even discarded when the network is congested. Quality of service (QoS) refers to a network that can use various basic technologies to provide better service capability for a given network communication, and is a security mechanism for the network to solve the problems of network delay and congestion.

The device supporting the QoS function can provide the transmission quality service. For a certain class of data flows, it can be assigned a certain level of transmission priority to identify its relative importance, and provide special transmission services for these data flows using various priority forwarding policies, congestion avoidance, and other mechanisms provided by the device. The network environment with QoS is configured, so that the predictability of the network performance is improved, the network bandwidth can be effectively distributed, and the network resources are more reasonably utilized.

In an Evolved Packet System (EPS), a basic granularity of QoS control is an EPS bearer (bearer), that is, all data flows on the same bearer will obtain the same QoS guarantee (such as a scheduling policy, buffer queue management, link layer configuration, and the like), and different QoS guarantees need different types of EPS bearers to provide.

More specifically, an EPS bearer passes through different network elements and interfaces, including: an S5/S8 interface between packet data gateway (PDN GW, PGW) to serving gateway (serving GW, SGW), an S1 interface between SGW to evolved base station (eNodeB), and a Uu interface between eNodeB to User Equipment (UE). The EPS bearer is mapped to different bottom bearers on each interface, and each network node is responsible for maintaining the identifier of the bottom bearer and the binding relationship between the bottom bearers. In a specific application scenario, under the same Packet Data Network (PDN) connection, one QoS flow corresponds to one EPS bearer, and one EPS bearer corresponds to one S5/S8 bearer, one S1 bearer, and one Data Radio Bearer (DRB), so that one QoS flow is mapped one by one with one S5/S8 bearer, one S1 bearer, and one DRB, respectively. Based on the above, in the air interface portion, one QoS flow corresponds to one DRB, that is, one QoS flow identifier (such as a QoS class identifier (QoS QCI)) corresponds to one DRB.

In the prior art, a QoS flow based QoS framework is proposed, which will support both guaranteed bit rate QoS flows and non-guaranteed bit rate QoS flows. A QoS flow is thus the smallest granularity that provides QoS differentiation in one Packet Data Unit (PDU) session. The QoS Flow identification (QoS Flow ID, QFI) is used to indicate one QoS Flow. At the air interface, a mechanism called reflective QoS (reflective QoS) is provided for implementing QoS control of the uplink data of the service data stream. The basic idea of the method is that the UE derives the mapping of QoS flow of uplink data transmission to DRB by transmitting in which DRB the UE derives the QoS flow of uplink data transmission to DRB according to the data packet carrying QoS flow in downlink. Based on the strategy, the uplink data packet marks the QoS flow ID which is the same as that of the downlink data packet, so that redundant signaling does not need to be sent for notification, and the signaling overhead is saved. In addition, even if signaling of QoS flow and DRB is configured, the base station may dynamically adjust mapping of QoS flow of uplink data transmission to DRB by reflecting QoS mode according to current cell load condition, QoS flow parameter, and the like. Currently, the QoS reflection technology has been widely applied to various standards for general communications, and when the QoS reflection technology is adopted, how to effectively and dynamically adjust or even close the currently established reflection QoS under the condition that the UE does not further receive downlink data packets is a technical problem that needs to be solved by technical personnel in the field.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a data transmission and related device, which can solve the technical problem of how to effectively and dynamically adjust or even close the currently established reflection QoS when a QoS reflection technology is adopted and a UE does not further receive a downlink data packet.

The embodiment of the invention can be realized by the following technical scheme:

in a first aspect, an embodiment of the present invention provides a data sending method, which may include:

the method comprises the steps that network equipment generates a first downlink control signaling, wherein the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used for indicating terminal equipment to close or open a reflection QoS function; and the network equipment sends the first downlink control signaling to the terminal equipment through a first Data Radio Bearer (DRB).

In the embodiment of the invention, the terminal equipment is informed to close the reflection QoS function by sending the control signaling through the first DRB under the condition that the network equipment does not have downlink data to be sent, and the transmission delay is greatly reduced because the control signaling is loaded on the DRB.

Optionally, the reflection QoS identifier is used to instruct the terminal device to start the reflection QoS function; after the network device sends the first downlink control signaling to the terminal device through the first data radio bearer DRB, the method further includes: the network device receives the first uplink data packet sent by the terminal device through the first DRB; and the network equipment sends the first downlink data packet to the terminal equipment through the first DRB, wherein the first downlink data packet does not carry the first QoS flow identification.

In the embodiment of the invention, under the condition that the network equipment confirms that the terminal equipment side already knows the mapping relation corresponding to the current reflection QoS function, the first QoS flow identification can be temporarily not carried in the downlink data packet, so that the signaling overhead is saved.

Optionally, the reflection QoS flag is used to instruct the terminal device to close the reflection QoS function; after the network device sends the first downlink control signaling to the terminal device through the first data radio bearer DRB, the method further includes: and the network equipment receives the second uplink data packet sent by the terminal equipment through the second DRB.

In the embodiment of the present invention, after the network device sends the indication to the terminal device to close the QoS function, the data packet corresponding to the first QoS flow identifier sent by the terminal device through the second DRB may be received, which indicates that the indication to close the QoS function is already in effect.

Optionally, the reflection QoS identifier is used to instruct the terminal device to start the reflection QoS function; after the network device sends the first downlink control signaling to the terminal device through the first data radio bearer DRB, the method further includes: and the network equipment sends the first downlink data packet to the terminal equipment through the first DRB, wherein the first downlink data packet does not carry the first QoS flow identification.

According to the embodiment of the invention, after the network equipment sends the indication to the terminal equipment to start the QoS function, the downlink data packet corresponding to the first QoS flow identification sent to the terminal equipment through the first DRB does not need to carry the first QoS flow identification, and the network equipment indicates the terminal equipment to close the reflection QoS function through the reflection QoS identification until the next time, so that the signaling overhead is saved.

In a second aspect, an embodiment of the present invention provides a data sending method, which may include: a terminal device receives a first downlink control signaling sent by a network device through a first Data Radio Bearer (DRB), wherein the first downlink control signaling carries a first quality of service (QoS) flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used for indicating the terminal device to close or open a reflection QoS function; when the reflection QoS identification is judged to be used for indicating the opening of the reflection QoS function, the terminal equipment sends a first uplink data packet to the network equipment by using the first DRB, wherein the first uplink data packet is a data packet corresponding to the first QoS flow identification; and under the condition that the reflection QoS identification is used for indicating to close the reflection QoS function, the terminal equipment sends a second uplink data packet to the network equipment by using a second DRB, wherein the second uplink data packet is a data packet corresponding to the first QoS flow identification, and the first DRB and the second DRB are different DRBs.

In the embodiment of the invention, the terminal equipment indicates to close the reflection QoS function by receiving the control signaling sent by the network equipment by using the first DRB under the condition that the network equipment does not have the downlink data packet to be sent, and the transmission delay is greatly reduced because the control signaling is carried on the DRB.

Optionally, the second DRB is a preset DRB, a DRB configured by an RRC signaling, or a historical DRB, where the historical DRB includes a DRB used by the terminal device to execute the QoS function last time.

According to the embodiment of the invention, after the terminal equipment terminates the current reflection QoS, the default or historical DRB can be reasonably utilized to continue the transmission of the uplink data packet corresponding to the corresponding QoS flow identification.

In a third aspect, an embodiment of the present invention provides a data sending method, which may include: the terminal equipment receives a first downlink data packet sent by the network equipment through a first Data Radio Bearer (DRB); the terminal device sends a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet, wherein the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier; and after a second time period after the terminal equipment receives the first downlink data packet arrives, sending a second uplink data packet to the network equipment through a second DRB, wherein the duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

In the embodiment of the invention, the terminal device receives the specific QoS flow sent by the network device through the first DRB to acquire the mapping relation between the DRB and the QoS flow identification, so that the corresponding reflection QoS function is started in a specified time period after the mapping relation is acquired, and the currently started reflection QoS function is actively stopped after a certain time, so that the problem that the current reflection QoS function is actively disabled by the terminal device side under the condition that the reflection QoS function of the terminal device needs to be stopped but no downlink data packet needs to be sent by the network device is solved, and the transmission requirement under some specific scenes is met.

Optionally, after a second time period after the terminal device receives the first uplink data packet arrives, sending a second uplink data packet to the network device through a second DRB, where the method includes: if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB in the first time period, the terminal device sends a second uplink data packet to the network device through the second DRB after a second time period after receiving the first downlink data packet arrives, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the duration of the second time period is equal to the first time period.

The embodiment of the invention realizes that if the terminal equipment does not receive the downlink data packet sent by the network equipment again in the appointed time period, the uplink data packet corresponding to the relevant QoS flow identification is transmitted through other DRBs after the appointed time is up, so as to lose the currently opened reflection QoS function.

Optionally, after a second time period after the terminal device receives the first uplink data packet arrives, sending a second uplink data packet to the network device through a second DRB, where the method includes: if the terminal device receives a second downlink data packet sent by the network device through the first DRB within the first time period, the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period after receiving the first downlink data packet arrives, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, the duration of the second time period is equal to the sum of the first time period and Δ t, and Δ t is a time difference between the terminal device receiving the first downlink data packet and the second downlink data packet; the method further comprises the following steps: and the terminal equipment sends the second uplink data packet to the network equipment through the first DRB after the first time period after the first downlink data packet is received and before the second time period is reached.

The embodiment of the invention realizes that the terminal equipment actively prolongs the time for starting the reflection QoS function under the condition that the downlink data packet corresponding to a certain QoS flow identifier is continuously sent from the network equipment side, so as to more reasonably realize the reflection QoS function.

Optionally, the method further includes: after receiving the first downlink data packet, the terminal device starts a first timer matched with the first QoS flow identifier, wherein the timing time of the first timer is the first time period; the sending, by the terminal device, a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet includes: and the terminal equipment sends a first uplink data packet to the network equipment through the first DRB after the first timer is started and before the first timer is overtime.

According to the embodiment of the invention, the timer is arranged on the terminal equipment side to automatically and accurately time the first time period, and the reflection QoS function is better completed in a matching manner.

Optionally, after a second time period after the terminal device receives the first uplink data packet arrives, sending a second uplink data packet to the network device through a second DRB, where the method includes: if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB after the first timer is started and before timeout occurs, the terminal device sends a second uplink data packet to the network device through the second DRB after the first timer is timeout, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

In the embodiment of the invention, the timer is arranged on the terminal equipment side to accurately time the first time period, and the currently executed reflection QoS function is invalid after the timer is overtime under the condition that the timer is not receiving the downlink data packet corresponding to the relevant QoS flow identification again before the time is overtime.

Optionally, after a second time period after the terminal device receives the first uplink data packet arrives, sending a second uplink data packet to the network device through a second DRB, where the method includes: if the terminal device receives a second downlink data packet sent by the network device through the first DRB after the first timer is started and before the first timer is overtime, the terminal device restarts the first timer, and sends a second uplink data packet to the network device through the second DRB after the first timer is restarted and overtime, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

In the embodiment of the invention, the timer is arranged on the terminal equipment side to accurately time the first time period, the timer is restarted under the condition that the downlink data packet is received again before the timer is overtime, the corresponding reflection QoS function is continuously executed after the timer is restarted, and the current reflection QoS function is terminated after the restart is overtime again.

Optionally, before the terminal device receives the first downlink data packet sent by the network device through the first data radio bearer DRB, the method further includes: and the terminal equipment receives a Radio Resource Control (RRC) signaling sent by the network equipment, wherein the RRC signaling carries the first time period.

In the embodiment of the invention, the duration of the first time period is set by the network equipment side, and the carrying and sending are carried in the RRC signaling which needs to be sent in the process of establishing the communication connection between the terminal equipment and the network equipment.

Optionally, the second DRB is a preset DRB, a DRB configured by an RRC signaling, or a historical DRB, where the historical DRB includes a DRB used by the terminal device to execute the reflection QoS function last time.

According to the embodiment of the invention, after the terminal equipment terminates the current reflection QoS function, the default or historical DRB is reasonably utilized to continue the transmission of the uplink data packet corresponding to the relevant QoS flow identification.

In a fourth aspect, an embodiment of the present invention provides a data sending method, which may include: the network equipment determines a first Data Radio Bearer (DRB) matched with the first QoS flow identification; and the network equipment sends a first downlink data packet to the terminal equipment through the first DRB, wherein the first downlink data packet is a data packet corresponding to the first QoS flow identifier.

The embodiment of the invention can be matched with the terminal equipment of the first aspect to reasonably open and close the reflection QoS function.

Optionally, after the network device sends the first downlink data packet to the terminal device through the first DRB, the method further includes: the network device receives a first uplink data packet sent by the terminal device through the first DRB, wherein the first uplink data packet is a data packet corresponding to the first QoS flow identifier; and the network equipment sends a second downlink data packet to the terminal equipment through the first DRB, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier.

In the embodiment of the invention, when the network equipment confirms that the terminal equipment side already knows the mapping relation corresponding to the current reflection QoS function, the first QoS flow identification is not carried in the downlink data packet temporarily, so that the signaling overhead is saved.

Optionally, the network device further receives a first uplink data packet sent by the terminal device through the first DRB, where the first uplink data packet is a data packet corresponding to the first QoS flow identifier; the network device sends a second downlink data packet to the terminal device through the first DRB in a first time period, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier; and when and after a second time period arrives, the network equipment sends a third downlink data packet to the terminal equipment through the first DRB, wherein the duration of the second time period is equal to the sum of the first time period and Δ t, the Δ t is equal to the time difference between the first downlink data packet and the second downlink data packet sent by the network equipment, the third downlink data packet is a data packet corresponding to the first QoS flow identifier, and the third downlink data packet carries the first QoS flow identifier.

The embodiment of the invention realizes that the first QoS flow identification is not carried in the downlink data packet under the condition that the network equipment confirms that the terminal equipment side has acquired the current reflection QoS function in the preset first time period, so as to save the signaling overhead. And the network equipment implicitly indicates the terminal equipment side to continuously execute the corresponding reflection QoS function by a method of carrying the first QoS flow identification in the downlink data packet under the condition that the network equipment determines that the terminal equipment side can close the current reflection QoS function after the second time period is reached.

In a fifth aspect, the present application provides a terminal device, where the terminal device has a function of implementing the method in any one of the above embodiments of the data transmission method. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a sixth aspect, the present application provides a network device, where the network device has a function of implementing the method in any one of the above data transmission method embodiments. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a seventh aspect, the present application provides a terminal device, where the terminal device includes a processor, and the processor is configured to support the terminal device to execute a corresponding function in the control data transmission method provided in the second aspect or the third aspect. The terminal device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the terminal device. The terminal device may also include a communication interface for the terminal device to communicate with other devices or a communication network.

In an eighth aspect, the present application provides a network device, where the network device includes a processor, and the processor is configured to support the network device to execute a corresponding function in the data transmission method provided in the first aspect or the fourth aspect. The network device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the network device. The network device may also include a communication interface for the network device to communicate with other devices or a communication network.

In a ninth aspect, the present application provides a computer storage medium for storing computer software instructions for the terminal device provided in the seventh aspect, which contains a program designed to execute the above aspects.

In a tenth aspect, the present application provides a computer storage medium for storing computer software instructions for the network device provided in the eighth aspect, which contains a program designed to execute the above aspects.

In an eleventh aspect, an embodiment of the present invention provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute the flow in the data transmission method in any one of the first aspect and the fourth aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer program, where the computer program includes instructions that, when executed by a computer, enable the computer to execute the flow in the data transmission method according to any one of the second aspect and the third aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

FIG. 1 is a diagram of a communication system architecture provided herein;

fig. 2 is a 5G communication framework supporting QoS flow according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;

fig. 4 is a schematic time relationship diagram of a data transmission method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating another data transmission method according to an embodiment of the present invention;

fig. 6A is a schematic diagram of an SDAP control signaling format according to an embodiment of the present invention;

fig. 6B is a schematic diagram of a data PDU format of another SDAP according to an embodiment of the present invention;

fig. 6C is a schematic diagram of a data PDU format of another SDAP according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another network device provided in the embodiment of the present invention;

fig. 10 is a schematic structural diagram of another terminal device provided in the embodiment of the present invention;

fig. 11 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings.

The embodiment of the invention can be applied to various communication systems, such as: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an advanced long term evolution (LTE-a) system, a Universal Mobile Telecommunications System (UMTS), or a next generation communication system such as a 5G Radio Access Technology in 3GPP (NR) system.

Referring to fig. 1, fig. 1 is a diagram of a communication system architecture according to an embodiment of the present invention, where the communication system architecture includes a core network device, a network device, and a terminal device, where the core network device and the network device communicate with each other, and the network device and the terminal device communicate with each other through a wireless air interface. And the devices in the communication system each support a reflected QoS function based on QoS flow, wherein,

the terminal device, which may be a device on the user side in the communication system, may start the reflection QoS function, thereby determining a mapping relationship between the corresponding QoS flow identifier and the DRB according to the downlink data packet sent by the network device, and sending the uplink data to the network device according to the mapping relationship. A terminal device can also be called a UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may be a Station (ST) in a Wireless Local Area Network (WLAN), and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in a 5G network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) network, and the like.

The network device may be a network element on a network side in the 5G communication system, for example, may be a gNB in the 5G communication system. In particular, the network device supports QoS flows that guarantee quality of service and supports reflective QoS functionality. And the network equipment sends the downlink data packet to the terminal equipment according to the mapping relation between the QoS stream identifier and the DRB, so that the terminal equipment executes corresponding reflection QoS according to the downlink data packet. The network device may be an Access Point (AP) in the WLAN, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device in a future 5G network (G Node B, abbreviated as "gNB" or "gnnodeb") or a network device in a future evolved PLMN network, and the like. In addition, in this embodiment of the present invention, a network device provides a service for a cell in which a terminal device is located, and the terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.

The core network device may be a network element on the core network side in the 5G communication system. By way of example and not limitation, the core network device provides relevant QoS services for the entire communication system, such as receiving a QoS service request from a terminal device, determining a QoS flow identification for relevant data traffic, and the like.

When the embodiment of the invention is applied to the next generation communication system such as the 5G system, namely the 5G system supporting the QoS flow. Referring to fig. 2, fig. 2 is a 5G communication framework supporting QoS flow according to an embodiment of the present invention, where the framework includes a base station gNB and a User equipment UE on a 5G access network side, and a User Port Function (UPF) on a 5G core network side. For each UE, the core network will establish one or more PDU sessions, and the base station side will establish one or more DRBs for each PDU session. The base station may map a plurality of QoS flows belonging to different PDU sessions to a plurality of DRBs, or may map a plurality of QoS flows in one PDU session to different DRBs. When a PDU session is established, the gNB will establish at least one default DRB for the PDU session. In addition, on the gNB side, the base station maps the downstream QoS flows to the DRB based on the QoS flow ID of the NG-U (Next-Generation-U) interface and the corresponding QoS strategy. At the UE side, the UE maps the uplink QoS flow to the corresponding DRB and sends the uplink QoS flow to the base station by carrying the QoS flow ID, so that the base station sends the QoSflow ID to the core network on the NG-U.

It is understood that the communication system architecture in fig. 1 and the QoS flow supporting 5G communication framework in fig. 2 are only an exemplary implementation manner in the embodiment of the present invention, and the communication system architecture and the QoS flow supporting 5G communication framework in the embodiment of the present invention include, but are not limited to, the above communication system architecture and communication framework.

Based on the above, the following provides technical problems and application scenarios to be solved by the present application. Currently, in uplink data transmission, a network device controls a mapping relationship between QoS flow and DRB on a terminal device side in the following two ways.

The first method is as follows: in the prior art, in the reflective QoS framework, as long as the UE receives the downlink data packet sent by the base station through the first DRB, the first DBR is always used to send the uplink data packet. Until the UE receives the downlink data packet corresponding to the same QoS flow identifier sent by other DRBs, the mapping relationship between the current QoS flow and the DBR will not be invalidated. For example, when a UE receives a downlink data packet carrying QFI 11 (QoS flow ID 1) on a DRB1, the uplink data packet carrying QFI1 is also transmitted on DRB1, and it is not possible to switch to transmit the uplink data packet carrying QFI1 on DRB2 until the UE receives a downlink data packet carrying QFI 11 on DRB2, otherwise the current DRB1 mapping relationship cannot fail. In this way, if the base station does not send the downlink data packet through the DRB2 (i.e., the base station may not currently have the downlink data packet to send), the UE side may not be able to disable the current mapping relationship.

In the second mode, the base station may notify the UE of which QoS flow is transmitted through which DRB specifically through RRC signaling. That is, the base station explicitly configures the mapping of QoS flow to DRB through RRC signaling. Therefore, each time the UE needs to lose the current mapping from QoS flow to DRB, the base station needs to resend the RRC signaling for notification, the UE side needs to receive the RRC signaling again, and the UE also needs to complete the interaction of the RRC signaling. Therefore, not only is the time delay hidden danger of RRC signaling interaction generated, but also the signaling overhead is wasted.

Based on the above two manners, if in some scenarios, the base station needs to release the current mapping relationship (for example, the current QoS service provided by the base station needs to be closed due to poor network transmission quality), but no downlink data needs to be sent to the UE currently, and the base station is not considered to notify through the RRC signaling with long delay, then the UE will continue to use the current mapping from QoS flow to DRB at this time. Therefore, the technical problem to be solved by the present application is that when a reflection QoS technology is adopted, after a QoS reflection function is started by a UE, under the condition that a downlink data packet is not further received, how to effectively close a currently established reflection QoS under the condition that a normal reflection QoS transmission is not affected and a current mapping relation needs to be closed, so as to change to another DRB for data transmission.

The following specifically analyzes and solves the technical problems proposed in the present application in combination with the embodiments of the data transmission method provided in the present application. The present application mainly discusses bearer mapping of a radio air interface part, i.e., mapping of a radio bearer DRB.

Referring to fig. 3, it is a flowchart of a data transmission method provided by an embodiment of the present invention, which may be applied to the communication system described in fig. 1, and will be described below with reference to fig. 3 from an interaction side of a network device and a terminal device, where the method may include the following steps S301 to S305.

Step S301: the network device determines a first data radio bearer DRB that matches the first QoS flow identification.

Specifically, after receiving a data stream sent by a core network device, a network device makes explicit a terminal device corresponding to the data stream and a QoS stream identifier of the data stream. After determining the QoS flow identifier, the base station may determine the DRB corresponding to the first QoS flow identifier according to a mapping relationship between the QoS and the DRB bearer, which are stored in advance. The DRB to which the first QoS flow identification matches may also be calculated based on a correlation algorithm. I.e., how to determine the first DRB matching the first QoS flow identification, the application is not limited in particular.

Step S302: and the network equipment sends a first downlink data packet to the terminal equipment through the first DRB.

Specifically, the first downlink data packet is a data packet corresponding to the first QoS flow identifier. And the network equipment sends the data packet corresponding to the first QoS flow identification to the terminal equipment through the determined first DRB. It should be noted that, in this application, a packet corresponding to a first QoS flow identifier may refer to that the packet carries the first QoS flow identifier, or may refer to that the packet does not carry the first QoS flow identifier, but belongs to a packet corresponding to the first QoS flow identifier. Can carry under specific and what kind of circumstances, need not carry under what kind of circumstances, can set up according to actual conditions. In the embodiment of the present invention, optionally, the downlink data packet needs to be carried when the network device sends the downlink data packet for the first time, and the downlink data does not need to be carried when the network device sends the downlink data packet for the second time or later; optionally, after the network device confirms that the terminal device has learned and executed the corresponding reflection QoS function, the network device may not carry the QoS flow identifier, and before the network device does not confirm, the network device needs to carry the QoS flow identifier. In one possible implementation, the network device may indicate that the QoS flow carries the QoS flow identification by setting a bit for the reflective QoS function. For example, when the bit is 1, the QoS flow is indicated to carry the QoS flow identification, otherwise, the QoS flow is not carried.

Step S303: the terminal equipment receives a first downlink data packet sent by the network equipment through a first Data Radio Bearer (DRB).

Specifically, correspondingly, the terminal device receives a first downlink packet sent by the network device through the first DRB, and recognizes that the first downlink packet is a packet corresponding to the first QoS flow identifier. The specific identification mode may be that some bits in the data packet are predefined in the protocol to be used for carrying the QoS flow identifier, so as to facilitate the identification by the terminal device.

In a possible implementation manner, the network device receives a first uplink data packet sent by the terminal device through the first DRB, where the first uplink data packet is a data packet corresponding to the first QoS flow identifier; the network equipment sends a second downlink data packet to the terminal equipment through the first DRB in a first time period, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier and does not carry the first QoS flow identifier; and when and after a second time period is reached, the network equipment sends a third downlink data packet to the terminal equipment through the first DRB, the duration of the second time period is equal to the sum of the first time period and delta t, the delta t is the time difference between the first downlink data packet and the second downlink data packet sent by the network equipment, the third downlink data packet is a data packet corresponding to the first QoS flow identifier, and the third downlink data packet carries the first QoS flow identifier. The embodiment of the invention realizes that the first QoS flow identification is not carried by the downlink data packet under the condition that the network equipment confirms that the terminal equipment side knows and executes the current reflection QoS function in the preset first time period, so as to save the signaling overhead. And the network equipment implicitly indicates the terminal equipment side to continuously execute the corresponding reflection QoS function by a method of carrying the first QoS flow identification in the downlink data packet under the condition that the network equipment determines that the terminal equipment side can close the current reflection QoS function after the second time period is reached. Specifically, how the network device determines that the second time is reached may be to set a timer corresponding to the terminal device side at the network device side for synchronous timing, or the network device starts timing by itself after sending the first downlink data packet to the terminal device (there may be a time delay with the time when the terminal device receives the first downlink data packet, so the second time period may also be the first time period plus the time delay), or a longer time delay, that is, a difference between the second time period and the first time period may be extended.

In a possible implementation manner, after the network device sends the first downlink data packet to the terminal device through the first DRB, the network device receives a first uplink data packet sent by the terminal device through the first DRB, where the first uplink data packet is a data packet corresponding to the first QoS flow identifier; and the network equipment sends a second downlink data packet to the terminal equipment through the first DRB, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier. In the embodiment of the invention, under the condition that the network equipment confirms that the terminal equipment side already knows and executes the current reflection QoS function, the first QoS flow identification is not carried in the downlink data packet temporarily, so that the signaling overhead is saved.

Step S304: and the terminal equipment sends a first uplink data packet to the network equipment through the first DRB in a first time period after receiving the first downlink data packet.

Specifically, the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier. And after receiving the first downlink data sent by the network equipment and in a first time period after determining that the data packet is borne by the first DRB and belongs to the data packet corresponding to the first QoS flow identifier, the terminal equipment sends the uplink data packet corresponding to the first QoS flow identifier to the network equipment by using the first DRB according to the mapping relation. I.e. the terminal device performs the corresponding reflection QoS function for the first time period.

In one possible implementation, the first time period may be configured for the base station side. And may have the same first time period for all QoS flows or different first time periods for different QoS flows. I.e. the corresponding duration may be defined according to the QoS flow priority level. E.g., the higher the QoS flow priority, the longer the corresponding first time period.

Step S305: and after a second time period after the terminal equipment receives the first downlink data packet arrives, sending a second uplink data packet to the network equipment through a second DRB.

Specifically, the duration of the second time period is greater than or equal to the first time period, the second uplink packet is a packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs. In the prior art, after performing step S301, the terminal device sends the uplink packet corresponding to the first QoS flow identifier to the network device through the first DRB until the network device sends the downlink packet corresponding to the first QoS flow identifier to the terminal device through the second DRB (i.e., other DRBs except the first DRB), and the terminal device will not end the current mapping relationship between the first QoS flow identifier and the first DRB, and then send the current mapping relationship through the second DRB. However, in the embodiment of the present invention, after the terminal device executes step S301, the terminal device first executes the mapping relationship between the first QoS flow identifier and the first DRB, which is indicated by the network device, in a preset time period (i.e., the first time period). But at the same time, after reaching a certain period of time, the current mapping relationship is finished. I.e. without the network device sending any indication or doing any related operation. And the second period of time is greater than or equal to the first period of time. That is, when the second time period is equal to the first time period, the first DRB is adopted in the predetermined first time period, and when the uplink data packet needs to be transmitted after the first time period, the second DRB is adopted. When the second time period is greater than the first time period, it is allowed to extend for a period of time after the predetermined first time period, and let it continue to execute the current mapping relationship, and wait until a period of time elapses and the current mapping relationship ends.

In a possible implementation manner, if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB within the first time period, the terminal device sends the second uplink data packet to the network device through the second DRB after the second time period after receiving the first downlink data packet arrives, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and at this time, the duration of the second time period is equal to the first time period. That is, when the UE does not receive the downlink data packet corresponding to the first QoS flow identifier sent by the base station through the first DRB again within the first time period, it is indirectly stated that the base station may not need to interact with the UE temporarily, or the UE may not have the data service corresponding to the first QoS flow identifier temporarily. The UE does not need to maintain the mapping relationship any more. Therefore, after the second time period (i.e. the first time period) is reached, the current mapping relationship between the first QoS flow identifier and the first DRB is disabled. That is, after the second time period arrives, if it is further required to send the uplink data packet corresponding to the first QoS flow identifier to the base station, the uplink data packet may be replaced with a second DRB, for example, a default DRB, or a DRB adopted before the QoS reflection is performed. That is, in the present application, the reflection QoS is set to have a certain time-sensitive process, and after the preset time fails, the default UE does not need to maintain the current reflection QoS relationship. Not only can the UE be guaranteed to know and execute the reflection QoS function within a certain time period, but also the reflection QoS function can be actively disabled after a certain time period, thereby solving the technical problems discussed above.

In a possible implementation manner, after a second time period after the terminal device receives the first uplink data packet arrives, sending, by the second DRB, a second uplink data packet to the network device, where the method includes: if the terminal device receives a second downlink data packet sent by the network device through the first DRB in the first time period, the terminal device sends a second uplink data packet to the network device through the second DRB after the second time period after receiving the first downlink data packet arrives, wherein the second downlink data packet is a data packet corresponding to the first QoS stream identifier, the duration of the second time period is equal to the sum of the first time period and delta t, and delta t is the time difference between the terminal device and the second downlink data packet. And the terminal device sends the second uplink data packet to the network device through the first DRB also after the first time period after receiving the first downlink data packet and before the second time period arrives. In the embodiment of the present invention, in the first time period, if the terminal device receives the data packet corresponding to the first QoS flow identifier sent by the base station through the first DRB again, it may indicate that the base station needs to perform close interaction with the base station currently, and the first time period is extended. That is, each time a data packet corresponding to the first QoS flow identifier sent by the first DRB is received, the first time period is extended, and as to how long the specific extension is, the data packet may be extended in a descending manner according to a preset algorithm, may be extended in an ascending manner, and may also be extended in an isochronous manner. Optionally, whether the data packet corresponding to the first QoS flow identifier sent by the first DRB is received for the first time or not, the first time period is added to the current time period, and the process is repeated in this cycle.

In a possible implementation manner, after receiving a first downlink data packet, a terminal device starts a first timer matched with a first QoS flow identifier, and the timing time of the first timer is a first time period; after the first timer is started and before the first timer is overtime, the terminal equipment sends a first uplink data packet to the network equipment through the first DRB; if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB after the first timer is started and before timeout occurs, the terminal device sends the second uplink data packet to the network device through the second DRB after the first timer is timeout, and the second downlink data packet is a data packet corresponding to the first QoS flow identifier. Specifically, in the implementation process, a scheme of a timer may be adopted, that is, a timer is set on the terminal device side, and a timing duration of the timer may be determined by the network device side, may be a uniform duration preset according to a protocol, and may be obtained by searching a storage list of the timer corresponding to the first QoS flow identifier stored in advance on the terminal device side, or a storage list of the timer corresponding to the first DRB. In the embodiment of the invention, the timer is arranged on the terminal equipment side to accurately time the first time period, and the currently executed reflection QoS function is terminated after the timer is overtime under the condition that the timer is not overtime and does not receive the downlink data packet corresponding to the relevant QoS flow identification again.

In a possible implementation manner, after receiving a first downlink data packet, a terminal device starts a first timer matched with a first QoS flow identifier, and the timing time of the first timer is a first time period; and the terminal equipment sends a first uplink data packet to the network equipment through the first DRB after the first timer is started and before the first timer is overtime. And if the terminal equipment receives a second downlink data packet sent by the network equipment through the first DRB after the first timer is started and before the first timer is overtime, the terminal equipment restarts the first timer, and sends a second uplink data packet to the network equipment through the second DRB after the first timer is restarted and overtime, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier. In the embodiment of the invention, the timer is arranged on the terminal equipment side to accurately time the first time period, the timer is restarted under the condition that the downlink data packet is received again before the timer is overtime, the corresponding reflection QoS function is continuously executed after the timer is restarted, and the current reflection QoS function is terminated after the restart is overtime again.

Referring to fig. 4, fig. 4 is a schematic time relationship diagram of a data transmission method according to an embodiment of the present invention. In a specific application scenario, corresponding to the upper half of fig. 4, assuming that the first time period is 5min, in this 5min, if the UE does not receive the second downlink data packet sent by the base station again, after the first time period arrives, and the terminal device needs to send the data packet corresponding to the first QoS flow identifier to the base station again, the terminal device cannot continue to adopt the first DRB, and needs to switch to the default DRB or the historical DRB (for example, the DRB used last time or the DRB used last time). Corresponding to the lower half of fig. 4, it is assumed that at the 3 rd min in the 5min, the UE receives the second downlink data packet sent by the base station again, and then the reflection function of the QoS mapping relationship is delayed backward by the first time period, and at this time, the second time period is 3min +5min ═ 8min, that is, after 8min, when the terminal device needs to send the data packet corresponding to the first QoS flow identifier to the base station again, the terminal device cannot continuously adopt the first DRB, and needs to switch to the default DRB or the historical DRB (for example, the DRB used last time or the DRB used last time). It can be understood that, if the third downlink packet is received again in the 8min, and so on, the second time period is the first time period + the time difference between the first time and the third time when the downlink packet is received. And will not be described in detail herein.

The application also provides another technical scheme for solving the technical problem provided by the application.

Referring to fig. 5, a flowchart of another data transmission method provided in an embodiment of the present invention is shown, and may be applied to the communication system described in fig. 1, and will be described below with reference to fig. 5 from an interaction side of a network device and a terminal device, where the method may include the following steps S501 to S505.

Step S501: the network device generates a first downlink control signaling.

Specifically, the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, where the reflection QoS identifier is used to instruct a terminal device to close or open a reflection QoS function.

Step S502: and the network equipment sends the first downlink control signaling to the terminal equipment through a first Data Radio Bearer (DRB).

Specifically, the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, where the reflection QoS identifier is used to instruct the terminal device to close or open a reflection QoS function, where the terminal device sends a first uplink data packet to the network device by using the first DRB when the reflection QoS function is opened, and sends a second uplink data packet to the network device by using a second DRB when the reflection QoS function is closed, where the first DRB and the second DRB are different DRBs, and the first uplink data packet and the second uplink data packet are both data packets corresponding to the first QoS flow identifier. Optionally, the first downlink control signaling may be a Service Data Adaptation Protocol (SDAP) control signaling, which may transmit both high-level Data and control signaling, and belongs to a user-level signaling, thereby ensuring low latency and low packet loss rate of the signaling to a greater extent. Compared with the characteristics that the RRC signaling is carried by a Signaling Radio Bearer (SRB), the time delay is long, and the packet loss rate is high, the SDAP control signaling has a small time delay, and does not need side feedback of the terminal device, thereby further reducing the time delay and improving the transmission efficiency.

Please refer to fig. 6A, which is a schematic diagram of an SDAP control signaling format according to an embodiment of the present invention, where the SDAP control signaling corresponding to fig. 6A may be used to carry the first downlink control signaling in the present application. For example, the following is carried in the SDAP control signaling: QFI, reflection QoS flag to turn off or on reflection QoS function (e.g., 0 indicates off, 1 indicates on), and type of control signaling, etc. Where D/C in the SDAP control signaling in fig. 6A represents a control data bit indicating whether the packet is a data packet or control signaling. For example, as shown in table 1:

TABLE 1

Bit	Action indication
		0	Control PDU
1	Data PDU

The PDU Type indicates a control command Type, for example, as shown in table 2:

TABLE 2

Bit	Action indication
		000	First downlink control signaling
001	Other downlink control signaling

I is a reflection QoS tag, for example, as shown in table 3:

TABLE 3

Bit	Action indication
		0	Turn on reflection QoS
1	Turning off reflection QoS

QoS flow ID then represents QoS flow identification, and R then represents redundancy.

Referring to fig. 6B and fig. 6C, fig. 6B is a schematic diagram of another data PDU format of an SDAP according to an embodiment of the present invention, and fig. 6C is a schematic diagram of another data PDU format of an SDAP according to an embodiment of the present invention. Compared with the SDAP control signaling corresponding to fig. 6A for carrying the first downlink control signaling, the SDAP control signaling corresponding to fig. 6B and fig. 6C are different in that both the SDAP control signaling are signaling for carrying transmission data, such as for carrying the first downlink data packet and the second downlink data packet in the present application.

In fig. 6B, the SDAP control signaling includes a D/C (indicating a control data bit) for indicating whether the data packet is a data packet or a control signaling, which is already described in fig. 6A and is not described herein again. The SDAP control signaling also comprises an AS Reflective QoS Indicator (ARQI) for indicating whether the currently carried QFI is used for accessing an AS layer; NRQI (NAS regenerative QoS indicator, NRQI) for indicating whether or not the currently carried QFI is used for the non-access NAS layer. For example: when NRQI is 0, NAS reflection QoS is not activated and is not controlled, and when NRQI is 1, NAS reflection QoS is activated; when ARQI is 0, no QFI is carried; when ARQI is 1, the QFI is carried. As shown in tables 4 and 5 below, table 4 corresponds to NRQI and table 5 corresponds to ARQI:

TABLE 4

Bit	Action indication
		0	Not used for NAS layer reflection QoS
1	For NAS layer reflection QoS

TABLE 5

Bit	Action indication
		0	Not used for AS layer reflection QoS
1	For AS layer reflection QoS

In fig. 6C, the signaling can refer to the description of fig. 6B, except that no QFI is carried in the control signaling, i.e., the case where both NRQI and ARQI are 0.

Step S503: the terminal equipment receives a first downlink control signaling sent by the network equipment through a first Data Radio Bearer (DRB).

Specifically, the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, where the reflection QoS identifier is used to instruct the terminal device to close or open a reflection QoS function.

In one possible implementation, the reflection QoS flag is used to instruct the terminal device to start the reflection QoS function; after the network device sends the first downlink control signaling to the terminal device through the first data radio bearer DRB, the method further includes: the network equipment receives a first uplink data packet sent by the terminal equipment through a first DRB; and the network equipment sends a first downlink data packet to the terminal equipment through the first DRB, wherein the first downlink data packet does not carry the first QoS flow identification. That is, when the network device confirms that the terminal device side has acquired the mapping relationship corresponding to the current reflection QoS function, the network device may temporarily not carry the first QoS flow identifier in the downlink packet, so as to save the signaling overhead.

Step S504: and under the condition that the reflection QoS identification is judged to be used for indicating the opening of the reflection QoS function, the terminal equipment sends a first uplink data packet to the network equipment by using the first DRB.

Specifically, the first uplink packet is a packet corresponding to the first QoS flow identifier; the terminal device determines that the reflection QoS flag in the preset flag in the received first control signaling indicates that the reflection QoS flag is to open the reflection QoS function, and then the terminal device may open the reflection QoS function when uplink data needs to be sent, that is, send the uplink data packet corresponding to the first QoS flow identifier to the network device through the first DRB.

Step S505: and under the condition that the reflection QoS identification is judged to be used for indicating the closing of the reflection QoS function, the terminal equipment sends a second uplink data packet to the network equipment by using a second DRB.

Specifically, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the first DRB and the second DRB are different DRBs. And the terminal equipment judges that the reflection QoS identification bit in the preset identification bit in the received first control signaling indicates that the reflection QoS function is closed, and then the terminal equipment terminates the currently executed QoS reflection function. And when the uplink data needs to be sent, switching to sending the uplink data packet corresponding to the first QoS flow identifier to the network device through the second DRB.

It should be noted that the embodiment corresponding to fig. 5 and the embodiment corresponding to fig. 3 may also be executed in combination with each other, for example, in a possible implementation manner, the network device may send a packet corresponding to the first QoS flow identifier through the first DRB, so as to instruct the terminal device to start the QoS reflection function. Further, the network device may notify the terminal device to turn off the current QoS reflection function through the first downlink control signaling. At this time, the problem in the prior art can be solved, that is, the network device can notify the UE to terminate the mapping relationship through the control signaling when there is no downlink data packet. In a possible implementation manner, the network device may send the first downlink control signaling through the first DRB to notify the terminal device to start the corresponding QoS reflection function, and then send the data packet corresponding to the first QoS flow identifier through the second DRB to instruct the terminal device to end the currently started QoS reflection function, that is, how to instruct to start and close reflection QoS may be reasonably combined with each other in this application, which is not limited in this application. In the embodiment of the invention, the terminal equipment is informed to close the reflection QoS function by sending the control signaling through the first DRB under the condition that the network equipment does not have downlink data to be sent, and the transmission delay is greatly reduced because the control signaling is loaded on the DRB.

The method of the embodiments of the present invention is explained in detail above, and the related apparatus of the embodiments of the present invention is provided below.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present invention, and the terminal device 10 may include a communication unit 101 and a processing unit 102, where details of each unit are described as follows.

A communication unit 101, configured to receive a first downlink data packet sent by a network device through a first data radio bearer DRB;

the communication unit 101 is further configured to send, within a first time period after receiving the first downlink data packet, a first uplink data packet to the network device through the first DRB, where the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier;

the communication unit 101 is further configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received arrives, where a duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

Optionally, the communication unit 101 is configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first uplink data packet is received, specifically:

and if a second downlink data packet sent by the network equipment through the first DRB is not received in the first time period, sending a second uplink data packet to the network equipment through the second DRB after a second time period after the first downlink data packet is received arrives, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the duration of the second time period is equal to the first time period.

if a second downlink data packet sent by the network device through the first DRB is received within the first time period, sending a second uplink data packet to the network device through the second DRB after a second time period after the first downlink data packet is received arrives, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, the duration of the second time period is equal to the sum of the first time period and Δ t, and the Δ t is a time difference between the terminal device receiving the first downlink data packet and the second downlink data packet;

the communication unit 101 is further configured to: and sending the second uplink data packet to the network equipment through the first DRB before the second time period is reached after the first time period after the first downlink data packet is received.

Optionally, the apparatus further includes a processing unit 102:

a processing unit 102, configured to start a first timer matched with the first QoS flow identifier after receiving the first downlink packet, where a timing time of the first timer is the first time period;

the communication unit 101 is configured to send a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet, specifically:

and after the first timer is started and before the first timer is not overtime, sending a first uplink data packet to the network equipment through the first DRB.

and if a second downlink data packet sent by the network equipment through the first DRB is not received after the first timer is started and before the first timer is overtime, sending a second uplink data packet to the network equipment through the second DRB after the first timer is overtime, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

and if a second downlink data packet sent by the network equipment through the first DRB is received after the first timer is started and before the first timer is overtime, restarting the first timer, and sending a second uplink data packet to the network equipment through the second DRB after the first timer is restarted and overtime, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

It should be noted that, for the functions of each functional unit in the terminal device 10 described in the embodiment of the present invention, reference may be made to the description related to the method embodiment described in fig. 3 and fig. 5, and details are not repeated here.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention, and the network device 20 may include a processing unit 201 and a communication unit 202, where details of each unit are described as follows.

A processing unit 201, configured to determine a first data radio bearer DRB matching the first QoS flow identifier;

a communication unit 202, configured to send a first downlink packet to a terminal device through the first DRB, where the first downlink packet is a packet corresponding to the first QoS flow identifier.

Optionally, the communication unit 202 is further configured to:

after sending a first downlink data packet to a terminal device through the first DRB, receiving a first uplink data packet sent by the terminal device through the first DRB, wherein the first uplink data packet is a data packet corresponding to the first QoS flow identifier; and sending a second downlink data packet to the terminal equipment through the first DRB, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier.

Optionally, the communication unit 202 is further configured to:

receiving a first uplink data packet sent by the terminal device through the first DRB, where the first uplink data packet is a data packet corresponding to the first QoS flow identifier; in a first time period, sending a second downlink data packet to the terminal device through the first DRB, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier; and when and after a second time period arrives, sending a third downlink data packet to the terminal equipment through the first DRB, wherein the duration of the second time period is equal to the sum of the first time period and Δ t, the Δ t is a time difference between the first downlink data packet and the second downlink data packet sent by the network equipment, the third downlink data packet is a data packet corresponding to the first QoS flow identifier, and the third downlink data packet carries the first QoS flow identifier.

It should be noted that, for the functions of each functional unit in the network device 20 described in the embodiment of the present invention, reference may be made to the related description of the method embodiment described in fig. 3 and fig. 5, and details are not repeated here.

Referring to fig. 9, fig. 9 is a schematic structural diagram of another network device according to an embodiment of the present invention, and the network device 30 may include a processing unit 301 and a communication unit 302, where details of each unit are described below.

A processing unit 301, configured to generate a first downlink control signaling, where the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used to instruct a terminal device to close or open a reflection QoS function;

a communication unit 301, configured to send the first downlink control signaling to the terminal device through a first data radio bearer DRB.

Optionally, the reflection QoS identifier is used to instruct the terminal device to start the reflection QoS function; the communication unit 301 is further configured to:

after a first downlink control signaling is sent to a terminal device through a first Data Radio Bearer (DRB), a first uplink data packet sent by the terminal device through the first DRB is received, the first downlink data packet is sent to the terminal device through the first DRB, and the first QoS flow identification is not carried in the first downlink data packet.

It should be noted that, for the functions of each functional unit in the network device 30 described in the embodiment of the present invention, reference may be made to the related description of the method embodiment described in fig. 3 and fig. 5, and details are not repeated here.

Referring to fig. 10, fig. 10 is a schematic structural diagram of another terminal device according to an embodiment of the present invention, where the network device may include a communication unit 401 and a processing unit 402, where details of each unit are described as follows.

A communication unit 401, configured to receive a first downlink control signaling sent by a network device through a first data radio bearer DRB, where the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used to instruct the terminal device to close or open a reflection QoS function;

a processing unit 402, configured to send, by using the first DRB, a first uplink data packet to the network device through the communication unit 401 when it is determined that the reflection QoS identifier is used to indicate that the reflection QoS function is turned on, where the first uplink data packet is a data packet corresponding to the first QoS flow identifier;

the processing unit 402 is further configured to, when it is determined that the reflection QoS identifier is used to indicate to close the reflection QoS function, send, by the communication unit 401, a second uplink data packet to the network device by using a second DRB, where the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the first DRB and the second DRB are different DRBs.

It should be noted that, for the functions of each functional unit in the terminal device 40 described in the embodiment of the present invention, reference may be made to the related description of the method embodiment described in fig. 3 and fig. 5, and details are not repeated here.

As shown in fig. 11, fig. 11 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. The terminal device 10, the network device 20, the network device 30, and the terminal device 40 may all be implemented in the structure shown in fig. 11, and the device 50 includes at least one processor 501, at least one memory 502, and at least one communication interface 503. In addition, the device may also include common components such as an antenna, which will not be described in detail herein.

The processor 501 may be a general purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the above schemes.

Communication interface 503 is used for communicating with other devices or communication Networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.

The Memory 502 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 502 is used for storing application program codes for executing the above scheme, and is controlled by the processor 501 for execution. The processor 501 is configured to execute application code stored in the memory 1202.

When the device shown in fig. 11 is the terminal device 10, the code stored in the memory 502 may perform the visible light-based communication method performed by the coordinator provided above, such as receiving a first downlink data packet sent by the network device through the first data radio bearer DRB; in a first time period after the first downlink data packet is received, sending a first uplink data packet to the network device through the first DRB, wherein the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier; and after a second time period after the first downlink data packet is received arrives, sending a second uplink data packet to the network device through a second DRB, wherein the duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

Where the device shown in fig. 11 is the network device 20, the memory 502 may store code that may perform the information sending method provided above, such as determining a first data radio bearer DRB that matches the first QoS flow identification; and sending a first downlink data packet to the terminal equipment through the first DRB, wherein the first downlink data packet is a data packet corresponding to the first QoS flow identifier.

Where the device shown in fig. 11 is a network device 30, the memory 502 stores code that is executable to perform the above-provided method of information transmission, such as transmitting first downlink control signaling to a terminal device over a first data radio bearer DRB, the first downlink control signaling carries a first quality of service (QoS) flow identifier and a reflection QoS identifier, the reflection QoS identification is used for indicating the terminal equipment to close or open the reflection QoS function, wherein, when the reflection QoS function is turned on, the terminal device transmits a first uplink data packet to the network device by using the first DRB, under the condition of closing the reflection QoS function, the terminal equipment transmits a second uplink data packet to the network equipment by using a second DRB, the first DRB and the second DRB are different DRBs, and the first uplink packet and the second uplink packet are both packets corresponding to the first QoS flow identifier.

When the device shown in fig. 11 is the terminal device 40, the code stored in the memory 502 may perform the above-provided information sending method, such as receiving a first downlink control signaling sent by a network device through a first data radio bearer DRB, where the first downlink control signaling carries a first QoS flow identifier and a reflection QoS identifier, and the reflection QoS identifier is used to instruct the terminal device to turn off or turn on a reflection QoS function; under the condition that the reflection QoS identification is judged to be used for indicating the opening of the reflection QoS function, a first uplink data packet is sent to the network equipment by using the first DRB, wherein the first uplink data packet is a data packet corresponding to the first QoS flow identification; and under the condition that the reflection QoS identification is judged to be used for indicating the closing of the reflection QoS function, sending a second uplink data packet to the network equipment by using a second DRB, wherein the second uplink data packet is a data packet corresponding to the first QoS flow identification, and the first DRB and the second DRB are different DRBs.

It should be noted that, for the functions of each functional unit in the terminal device 10, the network device 20, the network device 30, and the terminal device 40 described in the embodiment of the present invention, reference may be made to the description related to the method embodiment described in fig. 3 and fig. 5, and details are not described here again.

An embodiment of the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program includes, when executed, some or all of the steps of any one of the data transmission methods described in the above method embodiments.

An embodiment of the present invention further provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may perform part or all of the steps of any one of the data transmission methods.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute all or part of the steps of the above-described method of the embodiments of the present application. The storage medium may include: a U-disk, a removable hard disk, a magnetic disk, an optical disk, a Read-Only Memory (ROM) or a Random Access Memory (RAM), and the like.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A data transmission method, comprising:

the terminal equipment receives a first downlink data packet sent by the network equipment through a first Data Radio Bearer (DRB);

the terminal device sends a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet, wherein the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier;

and after a second time period after the terminal equipment receives the first downlink data packet arrives, sending a second uplink data packet to the network equipment through a second DRB, wherein the duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

2. The method of claim 1, wherein the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period arrives after receiving the first downlink data packet, comprising:

if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB in the first time period, the terminal device sends a second uplink data packet to the network device through the second DRB after a second time period after receiving the first downlink data packet arrives, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the duration of the second time period is equal to the first time period.

3. The method of claim 1 or 2, wherein the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period arrives after receiving the first downlink data packet, and the method comprises:

if the terminal device receives a second downlink data packet sent by the network device through the first DRB within the first time period, the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period after receiving the first downlink data packet arrives, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, the duration of the second time period is equal to the sum of the first time period and Δ t, and Δ t is a time difference between the terminal device receiving the first downlink data packet and the second downlink data packet;

the method further comprises the following steps: and the terminal equipment sends the second uplink data packet to the network equipment through the first DRB after the first time period after the first downlink data packet is received and before the second time period is reached.

4. The method of claim 1, wherein the method further comprises:

after receiving the first downlink data packet, the terminal device starts a first timer matched with the first QoS flow identifier, wherein the timing time of the first timer is the first time period;

the sending, by the terminal device, a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet includes:

and the terminal equipment sends a first uplink data packet to the network equipment through the first DRB after the first timer is started and before the first timer is overtime.

5. The method of claim 4, wherein the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period arrives after receiving the first downlink data packet, comprising:

if the terminal device does not receive the second downlink data packet sent by the network device through the first DRB after the first timer is started and before timeout occurs, the terminal device sends a second uplink data packet to the network device through the second DRB after the first timer is timeout, where the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

6. The method of claim 4, wherein the terminal device sends a second uplink data packet to the network device through a second DRB after a second time period arrives after receiving the first downlink data packet, comprising:

if the terminal device receives a second downlink data packet sent by the network device through the first DRB after the first timer is started and before the first timer is overtime, the terminal device restarts the first timer, and sends a second uplink data packet to the network device through the second DRB after the first timer is restarted and overtime, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier.

7. A data transmission method, comprising:

the network equipment determines a first Data Radio Bearer (DRB) matched with the first QoS flow identification;

the network equipment sends a first downlink data packet to terminal equipment through the first DRB, wherein the first downlink data packet is a data packet corresponding to the first QoS flow identifier;

the terminal device sends a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet, wherein the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier; and after a second time period after the terminal equipment receives the first downlink data packet arrives, sending a second uplink data packet to the network equipment through a second DRB, wherein the duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

8. The method of claim 7, wherein after the network device sends the first downlink packet to the terminal device via the first DRB, the method further comprises:

the network device receives a first uplink data packet sent by the terminal device through the first DRB, wherein the first uplink data packet is a data packet corresponding to the first QoS flow identifier;

and the network equipment sends a second downlink data packet to the terminal equipment through the first DRB, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier.

9. The method of claim 7, wherein the method further comprises:

the network device sends a second downlink data packet to the terminal device through the first DRB in a first time period, wherein the second downlink data packet is a data packet corresponding to the first QoS flow identifier, and the second downlink data packet does not carry the first QoS flow identifier;

and when and after a second time period arrives, the network equipment sends a third downlink data packet to the terminal equipment through the first DRB, wherein the duration of the second time period is equal to the sum of the first time period and Δ t, the Δ t is a time difference between the first downlink data packet and the second downlink data packet sent by the network equipment, the third downlink data packet is a data packet corresponding to the first QoS flow identifier, and the third downlink data packet carries the first QoS flow identifier.

10. A terminal device, characterized in that the terminal device comprises: a communication unit;

the communication unit is configured to receive a first downlink data packet sent by a network device through a first data radio bearer DRB;

the communication unit is further configured to send a first uplink data packet to the network device through the first DRB in a first time period after the first downlink data packet is received, where the first downlink data packet and the first uplink data packet are both data packets corresponding to a first QoS flow identifier;

the communication unit is further configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received arrives, where a duration of the second time period is greater than or equal to the first time period, the second uplink data packet is a data packet corresponding to the first QoS flow identifier, and the second DRB and the first DRB are different DRBs.

11. The terminal device of claim 10, wherein the communication unit is configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received, specifically:

12. The terminal device of claim 10 or 11, wherein the communication unit is configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received, specifically:

the communication unit is further configured to: and sending the second uplink data packet to the network equipment through the first DRB before the second time period is reached after the first time period after the first downlink data packet is received.

13. The terminal device of claim 10, wherein the terminal device further comprises a processing unit:

the processing unit is configured to start a first timer matched with the first QoS flow identifier after receiving the first downlink packet, where a timing time of the first timer is the first time period;

the communication unit is configured to send a first uplink data packet to the network device through the first DRB in a first time period after receiving the first downlink data packet, specifically:

14. The terminal device of claim 13, wherein the processing unit is configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received, specifically:

15. The terminal device of claim 13, wherein the processing unit is configured to send a second uplink data packet to the network device through a second DRB after a second time period after the first downlink data packet is received, specifically:

16. A network device, characterized in that the network device comprises: a processing unit and a communication unit;

the processing unit is configured to determine a first data radio bearer DRB matching the first QoS flow identifier;

the communication unit is configured to send a first downlink packet to a terminal device through the first DRB, where the first downlink packet is a packet corresponding to the first QoS flow identifier;

17. The network device of claim 16, wherein the communication unit is further configured to:

18. The network device of claim 16, wherein the communication unit is further configured to:

19. A network device comprising a processor, a memory and a communication interface, wherein the memory is configured to store data transmission program code, and the processor is configured to call the data transmission program code to perform the data transmission method according to any one of claims 7 to 9.

20. A terminal device comprising a processor, a memory and a communication interface, wherein the memory is configured to store data transmission program code, and the processor is configured to call the data transmission program code to execute the data transmission method according to any one of claims 1 to 6.