Qos flow processing method and device, and communications system

A communication processing method, the method comprising:

• receiving, by a second device on a data radio bearer (DRB), a data packet of a quality of service (QoS) flow mapped to the DRB;
• and
• receiving, by the second device on the DRB, an end marker sent by a first device;
• and
• receiving, by the second device, a data packet of the QoS flow on another DRB, wherein the end marker indicates ending of sending the data packet of the QoS flow on the DRB, the end marker is sent in a form of a control data unit, and the control data unit carries an identity of the QoS flow;
• wherein
• the end marker indicates that a protocol layer entity of the first device stops sending the data packet of the QoS flow on the DRB, the protocol layer entity is configured to map the QoS flow to the DRB or to the another DRB, and the protocol layer entity corresponds to one protocol data unit (PDU) session.

A first device, comprising a processor, and non-transitory storage coupled to the processor and having processor-executable instructions stored thereon which when executed cause the processor to:

• determine to change a mapping from a quality of service (QoS) flow to a data radio bearer (DRB) to a mapping from the QoS flow to another DRB;
• and
• send an end marker to a second device, wherein the end marker indicates ending of sending a data packet of the QoS flow on the DRB, the end marker is sent in a form of a control data unit, and the control data unit carries an identity of the QoS flow;
• wherein
• the end marker indicates that a protocol layer entity of the first device stops sending the data packet of the QoS flow on the DRB, the protocol layer entity is configured to map the QoS flow to the DRB or to the another DRB, and the protocol layer entity corresponds to one protocol data unit (PDU) session.

A second device, comprising a processor, and non-transitory storage coupled to the processor and having processor-executable instructions stored thereon which when executed cause the processor to:

• receive, on a data radio bearer (DRB), a data packet of a quality of service (QoS) flow mapped to the DRB;
• and
• receive, on the DRB, an end marker sent by a first device;
• and
• receive a data packet of the QoS flow on another DRB, wherein the end marker indicates ending of sending the data packet of the QoS flow on the DRB, the end marker is sent in a form of a control data unit, and the control data unit carries an identity of the QoS flow;
• wherein
• the end marker indicates that a protocol layer entity of the first device stops sending the data packet of the QoS flow on the DRB, the protocol layer entity is configured to map the QoS flow to the DRB or to the another DRB, and the protocol layer entity corresponds to one protocol data unit (PDU) session.

A non-transitory computer readable storage medium, wherein the computer readable storage medium stores a computer program, wherein when the computer program is executed by a computer, the computer performs operations comprising:

• determining, by a first device, to change a mapping from a quality of service (QoS) flow to a data radio bearer (DRB) to a mapping from the QoS flow to another DRB;
• and
• sending, by the first device, an end marker to a second device, wherein the end marker indicates ending of sending a data packet of the QoS flow on the DRB, the end marker is sent in a form of a control data unit, and the control data unit carries an identity of the QoS flow;
• wherein
• the end marker indicates that a protocol layer entity of the first device stops sending the data packet of the QoS flow on the DRB, the protocol layer entity is configured to map the QoS flow to the DRB or to the another DRB, and the protocol layer entity corresponds to one protocol data unit (PDU) session.

A non-transitory computer readable storage medium, wherein the computer readable storage medium stores a computer program, wherein when the computer program is executed by a computer, the computer performs operations comprising:

• receiving, by a second device on a data radio bearer (DRB), a data packet of a quality of service (QoS) flow mapped to the DRB;
• and
• receiving, by the second device on the DRB, an end marker sent by a first device;
• and
• receiving, by the second device, a data packet of the QoS flow on another DRB, wherein the end marker indicates ending of sending the data packet of the QoS flow on the DRB, the end marker is sent in a form of a control data unit, and the control data unit carries an identity of the QoS flow;
• wherein
• the end marker indicates that a protocol layer entity of the first device stops sending the data packet of the QoS flow on the DRB, the protocol layer entity is configured to map the QoS flow to the DRB or to the another DRB, and the protocol layer entity corresponds to one protocol data unit (PDU) session.