CN109286574B - Information transmission method, network side equipment and terminal - Google Patents
Information transmission method, network side equipment and terminal Download PDFInfo
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- CN109286574B CN109286574B CN201710591248.3A CN201710591248A CN109286574B CN 109286574 B CN109286574 B CN 109286574B CN 201710591248 A CN201710591248 A CN 201710591248A CN 109286574 B CN109286574 B CN 109286574B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2491—Mapping quality of service [QoS] requirements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
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Abstract
The embodiment of the invention provides an information transmission method, network side equipment and a terminal, wherein the method comprises the following steps: generating a downlink control packet, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a Data Radio Bearer (DRB) used for sending the downlink data packet is used for uplink data packet feedback when an uplink data packet is fed back after the terminal receives the downlink data packet; and sending the downlink control packet to a terminal. The scheme of the invention reduces the cost of the packet header when the Qos flow is mapped to the DRB, and improves the reliability of information transmission.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information transmission method, a network side device, and a terminal.
Background
The current LTE system adopts an end-to-end QoS management mechanism and differentiated services to meet QoS requirements of different services. QoS is accomplished in a multi-layer manner, and QoS management of the entire LTE network is implemented by fig. 1. E-RAB (evolved Radio access Bearer) and Radio Bearer are minimum units for QoS management at an EPS side and an RAN (Radio access layer) side, respectively. An eps (evolved Packet system) is a complete set of evolved Packet systems, and is formed by combining a radio network (LTE), a core network (EPC) and a User Equipment (UE).
As shown in fig. 2, in 5G, a downlink data packet (IP Flow) first maps the downlink data packet from an application layer to QoS Flow (QoS Flow) through a template (e.g., an IP quintuple template), when a Core Network (CN) sends the downlink data packet to an access network (RAN), the access network is notified of a QoS Flow ID (QoS Flow identifier) corresponding to the downlink data packet on an interface, and after receiving the data packet on the QoS Flow, the access network (RAN) maps the data packet on the QoS Flow to a DRB (data radio bearer) for sending.
If the core network enables NAS (non-access stratum) reflection QOS (reflective QOS), the uplink data packet sent by the UE side to the network side is also transmitted according to the same mapping relationship from IP flow to QOS flow.
In the prior art, if a data packet transmits data according to a reflective QoS mechanism, the overhead of a packet header when a QoS flow is mapped to a DRB is large, and a transmission error of the data packet may occur.
Disclosure of Invention
The invention provides an information transmission method, network side equipment and a terminal, which reduce the cost of a packet header when a Qos flow is mapped to a DRB and improve the reliability of information transmission.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a method of transmitting information, comprising:
generating a downlink control packet, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a Data Radio Bearer (DRB) used for sending the downlink data packet is used for uplink data packet feedback when an uplink data packet is fed back after the terminal receives the downlink data packet;
and sending the downlink control packet to a terminal.
Wherein, after sending the downlink control packet to the terminal, the method further comprises:
sending the downlink data packet to a terminal;
and the receiving terminal receives the uplink data packet fed back after receiving the downlink data packet.
Wherein the step of sending the downlink data packet to the terminal comprises:
and mapping the downlink data packet to a first DRB, and sending the downlink data packet to a terminal.
Wherein, the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
receiving an uplink data packet fed back by the first DRB after the downlink data packet is received by the terminal; and when the terminal receives the downlink data packet and feeds back the uplink data packet corresponding to the Qos flow identifier, the terminal adopts the first DRB adopted when the network side sends the downlink data packet for feedback.
Wherein the step of sending the downlink data packet to the terminal comprises:
and if the downlink data packet corresponding to the Qos flow identifier is mapped to the first DRB for transmission, the downlink data packet needs to be mapped to the second DRB for transmission, and the downlink data packet is mapped to the second DRB for transmission to the terminal.
Before mapping the downlink data packet to the second DRB and sending the downlink data packet to the terminal, the method further includes:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
Wherein, the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
and after receiving the downlink data packet, the receiving terminal receives the uplink data packet fed back on the second DRB.
Wherein the step of sending the downlink data packet to the terminal comprises:
and mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal.
Wherein, the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
Wherein the step of sending the downlink data packet to the terminal comprises:
and if the downlink data packet corresponding to the Qos flow identifier is mapped to a third DRB for transmission, the downlink data packet needs to be mapped to a fourth DRB for transmission, and the downlink data packet is mapped to the fourth DRB for transmission to the terminal.
Before mapping the downlink data packet to the fourth DRB and sending the downlink data packet to the terminal, the method further includes:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: the Qos flow identifier, the reflection identifier and the identifier of the designated second target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
Wherein, the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
and after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated second target DRB.
Wherein the step of sending the downlink control packet to the terminal comprises:
and encapsulating the downlink control packet into a packet data unit PDU, mapping the PDU to a DRB for sending the downlink data packet through an access network, and sending the PDU to a terminal.
The information transmission method further comprises the following steps:
and receiving an uplink acknowledgement control packet fed back by the terminal after the received downlink control packet.
The downlink control packet carries tag information for identifying the downlink control packet, and the uplink acknowledgement control packet carries the same tag information as the downlink control packet received by the terminal.
Wherein the marking information includes: the sequence number of the QoS flow corresponding to the downlink data packet
The information transmission method further comprises the following steps:
and if the network side does not correctly receive the uplink data packet or the uplink acknowledgement control packet, the network side retransmits the downlink control packet.
The retransmitted downlink control packet has the same tag information as the downlink control packet transmitted last time or tag information obtained by adding a step length on the basis of the tag information of the downlink control packet transmitted last time.
Wherein, the downlink control packet and the uplink acknowledgement control packet are both fixed-length control packets; or
The downlink control packet and the uplink acknowledgement control packet both carry indication information indicating that the packet is a control packet.
And the uplink acknowledgement control packet also carries acknowledgement information.
The embodiment of the invention also provides an information transmission method, which comprises the following steps:
and receiving a downlink control packet sent by a network side, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after the downlink data packet is received by a terminal.
The information transmission method further comprises the following steps:
receiving a downlink data packet sent by a network side;
and feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet.
The step of receiving the downlink data packet sent by the network side comprises the following steps:
and receiving the downlink data packet sent by the network side through the first DRB.
Wherein, according to the downlink control packet, the step of feeding back the uplink data packet corresponding to the downlink data packet to the network side includes:
feeding back an uplink data packet corresponding to the downlink data packet to a network side through the first DRB according to the downlink control packet; and when the terminal receives the downlink data packet and feeds back the uplink data packet corresponding to the Qos flow identifier, the terminal adopts the first DRB adopted when the network side sends the downlink data packet for feedback.
The step of receiving the downlink data packet sent by the network side comprises the following steps:
and receiving the downlink data packet which is sent by the network side and is remapped to the second DRB by the first DRB, wherein the downlink data packet corresponds to the Qos flow identification.
The information transmission method further comprises the following steps:
receiving a downlink control packet which is regenerated and sent by the network side before the network side sends the downlink data packet through the second DRB; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
Wherein, according to the downlink control packet, the step of feeding back the uplink data packet corresponding to the downlink data packet to the network side includes:
and after receiving the downlink data packet sent by the second DRB, feeding back an uplink data packet on the second DRB.
The step of receiving the downlink data packet sent by the network side comprises the following steps:
and receiving the downlink data packet sent by the network side through a third DRB.
Wherein, according to the downlink control packet, the step of feeding back the uplink data packet corresponding to the downlink data packet to the network side includes:
after receiving the downlink data packet sent by the third DRB, an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
The step of receiving the downlink data packet sent by the network side comprises the following steps:
and receiving the downlink data packet which is sent by the network side and is remapped to the fourth DRB by the third DRB, wherein the downlink data packet corresponds to the Qos flow identification.
The information transmission method further comprises the following steps:
receiving a downlink control packet which is generated and sent again by the network side before the network side sends the downlink data packet through the fourth DRB; wherein, the regenerated downlink control packet carries: the Qos flow identifier, the reflection identifier and the identifier of the designated second target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
Wherein, according to the downlink control packet, the step of feeding back the uplink data packet corresponding to the downlink data packet to the network side includes:
and according to the downlink control packet, after receiving a downlink data packet through a fourth DRB, feeding back an uplink data packet on the second target DRB.
The step of receiving the downlink control packet sent by the network side comprises the following steps:
and receiving a Packet Data Unit (PDU) sent by a network side through a data transmission link buffer (DRB) sending a downlink data packet, wherein the PDU is the PDU formed by encapsulating the downlink control packet by the network side.
The information transmission method further comprises the following steps:
and after receiving the downlink control packet, feeding back an uplink acknowledgement control packet to the network side.
The downlink control packet carries tag information for identifying the downlink control packet, and the uplink acknowledgement control packet carries the same tag information as the downlink control packet received by the terminal.
Wherein the marking information includes: and the sequence number of the QoS flow corresponding to the downlink data packet.
The information transmission method further comprises the following steps:
and re-receiving the downlink control packet retransmitted by the network side if the network side does not correctly receive the uplink data packet or the uplink acknowledgement control packet.
The retransmitted downlink control packet has the same tag information as the downlink control packet transmitted last time or tag information obtained by adding a step length on the basis of the tag information of the downlink control packet transmitted last time.
Wherein, the downlink control packet and the uplink acknowledgement control packet are both fixed-length control packets; or
The downlink control packet and the uplink acknowledgement control packet both carry indication information indicating that the packet is a control packet.
And the uplink acknowledgement control packet also carries acknowledgement information.
An embodiment of the present invention further provides a network side device, including:
a processor, configured to generate a downlink control packet, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether to perform uplink data packet feedback by using a DRB that is the same as a data radio bearer DRB used for sending the downlink data packet when an uplink data packet is fed back after a terminal receives the downlink data packet;
and the transceiver is used for sending the downlink control packet to the terminal.
Wherein the transceiver is further configured to: sending the downlink data packet to a terminal; and receiving an uplink data packet fed back by the terminal after receiving the downlink data packet.
Wherein, when the transceiver sends the downlink data packet to the terminal, the transceiver is specifically configured to: and mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal.
When the receiving terminal receives the uplink data packet fed back after the downlink data packet, the transceiver is specifically configured to: after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
An embodiment of the present invention further provides a terminal, including:
the transceiver is used for receiving a downlink control packet sent by a network side, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after the downlink data packet is received by a terminal.
Wherein the transceiver is further configured to: receiving a downlink data packet sent by a network side; and feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet.
When receiving a downlink data packet sent by a network side, the transceiver is specifically configured to: and receiving the downlink data packet sent by the network side through a third DRB.
When the transceiver feeds back the uplink data packet corresponding to the downlink data packet to the network side according to the downlink control packet, the transceiver is specifically configured to: after receiving the downlink data packet sent by the third DRB, an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
in the scheme of the invention, a downlink control packet is generated, the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after a terminal receives the downlink data packet; and sending the downlink control packet to a terminal. Therefore, the overhead of mapping the QoS flow to the DRB is reduced, the reliability of sending the control information is improved, and the correctness of data packet transmission is ensured.
Drawings
Fig. 1 is a schematic diagram of a Qos management method of an existing LTE network;
FIG. 2 is a mapping of 5G QoS flow to DRB;
FIG. 3 is a flow chart of a method of transmitting information according to the present invention;
FIG. 4 is a flow chart illustrating a reflective turn-on process of a downlink control packet transmission example;
FIG. 5 is a flow chart illustrating a case of a downlink control packet transmission-reflective shutdown;
fig. 6 and 7 are schematic diagrams of transmission formats of downlink control packets;
fig. 8 and 9 are schematic diagrams of transmission formats of uplink control packets.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 3, an embodiment of the present invention provides an information transmission method, including:
and step 32, sending the downlink control packet to the terminal.
Further, in the information transmission method of this embodiment, after sending the downlink control packet to the terminal, the method may further include:
and step 34, receiving the uplink data packet fed back by the terminal after receiving the downlink data packet.
In the embodiment of the present invention, a downlink control packet is generated, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether to perform uplink data packet feedback by using a DRB that is the same as a data radio bearer DRB used for transmitting the downlink data packet when an uplink data packet is fed back after a terminal receives the downlink data packet; and sending the downlink control packet to a terminal.
The downlink control packet may be used as a control PDU for QoS flow to a DRB mapping layer (SDAP layer). The downlink control PDU is introduced, the head cost of the downlink SDAP can be effectively reduced, and a uniform packet structure can be adopted for the reflex QoS and the non-reflex QoS of the AS layer.
Further, for the case that the AS layer reflection flag is in the on state, the format of the SDAP packet may not be changed, and only by separately sending the control packet containing the QFI and the AS RQI on flag in the downlink, the terminal is informed that the uplink data with the QFI needs to be sent in the same DRB AS the downlink.
For the case that the AS layer reflection identifier is in the off state, the DRB that should be used by the uplink data corresponding to the Qos flow identifier may be further indicated by carrying the specified uplink DRB ID.
Specifically, the case where the reflection flag is in the on state includes:
as shown in fig. 4, the information transmission method includes:
step 41, generating a downlink control packet, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, the reflection identifier is in an open state, and after receiving the downlink data packet, when feeding back an uplink data packet, the terminal uses a network to send a data radio bearer DRB used by the downlink data packet to perform feedback of the uplink data packet;
step 42, sending the downlink control packet to a terminal;
step 43, mapping the downlink data packet to a first DRB, and sending the downlink data packet to a terminal;
step 44, receiving the uplink data packet fed back by the first DRB after the downlink data packet is received by the receiving terminal; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identifier by using the first DRB adopted when the network side sends the downlink data packet.
In this embodiment, the access network selects the DRB1 (the first DRB) to transmit a data packet with a QFI (Qos flow identifier) in uplink and downlink as N, and an SDAP (service discovery application configuration, that is, a transmission interface between the core network and the radio access layer) at a downlink transmitting end needs to generate an SDAP control packet, where the control packet carries a flag for turning on the QFI ═ N and the RQI (reflection identifier).
The downlink control packet may be transmitted before the downlink data packet of QFI ═ N.
When the terminal receives the downlink control packet at the DRB1, the uplink data corresponding to QFI ═ N is transmitted using the DRB 1.
Specifically, when the downlink data packet is sent to the terminal, if the downlink data packet corresponding to the Qos flow identifier is mapped to the first DRB for sending, the downlink data packet needs to be mapped to the second DRB for sending, and the downlink data packet is mapped to the second DRB for sending to the terminal.
At this time, before mapping the downlink data packet to the second DRB and sending the downlink data packet to the terminal, the method may further include:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
And after receiving the downlink data packet, the receiving terminal receives the uplink data packet fed back on the second DRB.
In this embodiment, if the QFI ═ N downlink data packet needs to be remapped to the DRB2 for transmission, the downlink sender SDAP layer retransmits the downlink control packet carrying the QFI ═ N and RQI turn-on flag on the DRB 2.
After receiving the packet at DRB2, the terminal transfers the QFI-N uplink data to DRB2 and transmits the uplink data.
Specifically, the case where the reflection flag is in the off state includes:
as shown in fig. 5, the information transmission method includes:
step 51, generating a downlink control packet, where the downlink control packet carries a QoS flow identifier, a reflection identifier, and an identifier of a target DRB of an attended, where the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, the reflection identifier is in a closed state, and when a terminal receives the downlink data packet and feeds back an uplink data packet, the target DRB is used to feed back the uplink data packet;
step 52, sending the downlink control packet to a terminal;
step 53, mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal;
and step 54, after receiving the downlink data packet, the receiving terminal receives the uplink data packet fed back by the designated first target DRB.
In this embodiment, the access network selects the DRB1 to perform downlink QFI-N packet transmission, and the DRB2 performs uplink QFI-N packet transmission, where the downlink sender SDAP needs to generate an SDAP control packet, and the control packet carries the same QFI-N, RQI shutdown flag and the uplink DRB ID (e.g., DRB 2).
The control packet may be sent before the downstream packet of QFI ═ N.
When the UE receives the downlink control packet at DRB1 and reads the target DRB ID of 2, the uplink data packets corresponding to QFI of N are all transmitted using DRB 2.
Specifically, when the downlink data packet is sent to the terminal, if the downlink data packet corresponding to the Qos flow identifier is mapped to the third DRB for sending, the downlink data packet needs to be mapped to the fourth DRB for sending, and the downlink data packet is mapped to the fourth DRB for sending to the terminal.
At this time, before mapping the downlink data packet to the fourth DRB and sending the downlink data packet to the terminal, the method further includes:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: the Qos flow identifier, the reflection identifier and the identifier of the designated second target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
And after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated second target DRB.
In this embodiment, if the downlink data with QFI ═ N needs to be remapped to the DRB2 for transmission, at this time, the uplink data packet needs to be mapped to the DRB1 for transmission, the downlink sender SDAP layer retransmits the downlink control packet carrying QFI ═ N, RQI close and the target DRB ═ 1 on the DRB 2.
After receiving the packet at DRB2, the terminal transfers the QFI-N uplink data to DRB1 and transmits the uplink data.
In the foregoing embodiment of the present invention, the step of sending the downlink control packet to the terminal may include: and encapsulating the downlink control packet into a packet data unit PDU, mapping the PDU to a DRB for sending the downlink data packet through an access network, and sending the PDU to a terminal. The downlink control PDU is introduced, the head cost of the downlink SDAP can be effectively reduced, and a uniform packet structure can be adopted for the reflex QoS and the non-reflex QoS of the AS layer.
In a specific embodiment of the present invention, the information transmission method includes, on the basis of the foregoing steps, the following steps:
and step 35, receiving an uplink acknowledgement control packet fed back by the terminal after the received downlink control packet. Preferably, the uplink ack control packet may only feed back the uplink ack control packet for the latest downlink control packet received.
The downlink control packet carries tag information for identifying the downlink control packet, and the uplink acknowledgement control packet carries tag information which is the same as that of the downlink control packet received by the terminal last.
Wherein the marking information includes: and the sequence number of the QoS flow corresponding to the downlink data packet.
In this embodiment, after receiving the downlink control packet, the terminal feeds back the uplink acknowledgement control packet, so as to improve the transmission accuracy of the downlink control packet and reduce the transmission times of the downlink control packet, where the uplink acknowledgement control packet needs to carry a flag that is the same as that of the received downlink control packet, where the flag may be a serial number, and if the flag is a serial number, the serial number should be a QoS flow level, and the count is performed for each QoS flow. Preferably, the uplink ack control packet may only acknowledge the latest downlink control packet received.
In a specific embodiment of the present invention, the information transmission method includes, on the basis of the foregoing steps, the following steps:
and step 36, if the network side does not correctly receive the uplink data packet or does not correctly receive the uplink acknowledgement control packet, re-sending the downlink control packet.
The retransmitted downlink control packet has the same tag information as the downlink control packet transmitted last time or tag information obtained by adding a step length on the basis of the tag information of the downlink control packet transmitted last time.
In this embodiment, the flag information of the downlink control packet may be the above sequence number, and in order to ensure the reliability of the SDAP downlink control packet, a repeat transmission mechanism is proposed for the SDAP downlink control packet. And if the uplink data packet is not received on the determined DRB or the uplink confirmation control packet corresponding to the SDAP downlink control packet is not received, retransmitting the SDAP downlink control packet. The sequence number corresponding to the SDAP may not be changed or may be increased by one when retransmitting. However, in any case, it is necessary to ensure that the sequence number corresponding to the latest QOS reflective information is up to date.
In the above embodiments of the present invention, as shown in fig. 6 to 9, the specific structures of the downlink control packet and the uplink control packet are as follows:
fig. 6 shows that the downlink control packet carries indication information indicating whether the packet is a control packet or a data packet, for example, a D/C field, and all the SDAP packets carry a 1-bit D/C field, and the current packet is indicated as a data packet or a control packet by the D/C field; meanwhile, the downlink control packet also has QFI field (Qos flow identification), SN field (sequence number), RQI field (reflection identification) and DRB field;
as shown in fig. 7, the downlink control packet is a fixed-length control packet, and the downlink control packet further has a QFI field (Qos flow identifier), an SN field (sequence number), an RQI field (reflection identifier), and a DRB field; the control packet adopts a fixed length, and the size of the control packet does not belong to the range of the data packet. For example, the control packet is fixed by 2 bytes, but the data packets are all larger than 2 bytes in size. The receiving side directly distinguishes whether the current packet is a data packet or a control packet through the packet size.
Fig. 8 shows that the uplink control packet carries indication information indicating whether the packet is a control packet or a data packet, such as a D/C field and a 1-bit D/C field indicating whether the current packet is a data packet or a control packet; meanwhile, the uplink acknowledgement control packet also carries acknowledgement information, specifically an A/N field, and also has an SN field (sequence number) and an R (reserved field);
fig. 9 shows that the uplink control packet is a control packet with a fixed length, and meanwhile, the uplink acknowledgement control packet also carries acknowledgement information, specifically an a/N field, and also has an SN field (sequence number) and an R field (reserved field).
In the above embodiment of the present invention, for the downlink control packet, SN, QFI, RQI, and DRB ID information needs to be filled. And the SN carries out uplink feedback marking, the QFI indicates the QOS Flow ID of operation, the RQI indicates whether the operation is the AS reflex QoS, and the DRB ID marks the DRB ID corresponding to the current Flow ID uplink data under the condition that the reflex QoS is closed.
And aiming at the uplink control packet, SN information needs to be filled and reception information is confirmed, and the maximum SN number received by the downlink is informed.
In the above embodiment of the present invention, a dedicated downlink control packet is formed, so that the overhead of a data packet header is reduced and the reliability of control information is improved when the core network performs mapping from Qos flow to DRB, thereby effectively reducing RRC signaling.
Another embodiment of the present invention further provides an information transmission method, including:
step 101, receiving a downlink control packet sent by a network side, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB identical to a data radio bearer DRB used for sending the downlink data packet is used for uplink data packet feedback when an uplink data packet is fed back after a terminal receives the downlink data packet.
The information transmission method further comprises the following steps:
102, receiving a downlink data packet sent by a network side;
and 103, feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet.
The reflection flag is in a first condition of an on state:
step 102 comprises: step 1021, receiving the downlink data packet sent by the network side through the first DRB.
Step 103 comprises: step 1031, according to the downlink control packet, feeding back an uplink data packet corresponding to the downlink data packet to a network side through the first DRB; and when the terminal receives the downlink data packet and feeds back the uplink data packet corresponding to the Qos flow identifier, the terminal adopts the first DRB adopted when the network side sends the downlink data packet for feedback.
The reflection flag is in a second condition of an on state:
step 102 comprises: step 1022, receiving the downlink data packet sent by the network side by remapping the downlink data packet corresponding to the Qos flow identifier to the second DRB by the first DRB.
The information transmission method further comprises the following steps: step 104, receiving a downlink control packet which is regenerated and sent by the network side before the network side sends the downlink data packet through the second DRB; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
Step 103 comprises: step 1032, after receiving the downlink data packet sent by the second DRB, feeding back an uplink data packet on the second DRB.
The reflection flag is a first case of an off state:
step 102 comprises: and 1023, receiving the downlink data packet sent by the network side through the third DRB.
Step 103 comprises: 1033, after receiving the downlink data packet sent by the third DRB, sending an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
The reflection flag is in a second condition of an off state:
step 102 comprises: step 1024, receiving the downlink data packet sent by the network side by remapping the downlink data packet corresponding to the Qos flow identifier to the fourth DRB by the third DRB.
The information transmission method may further include: step 105, receiving a downlink control packet which is generated and sent again by the network side before the downlink data packet is sent by the fourth DRB; wherein, the regenerated downlink control packet carries: the Qos flow identifier, the reflection identifier and the identifier of the designated second target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
Step 103 comprises: step 1034, after receiving the downlink data packet through the fourth DRB according to the downlink control packet, feeding back the uplink data packet on the second target DRB.
In the above embodiment of the present invention, step 101 may include: and receiving a Packet Data Unit (PDU) sent by a network side through a data transmission link buffer (DRB) sending a downlink data packet, wherein the PDU is the PDU formed by encapsulating the downlink control packet by the network side.
In a specific embodiment of the present invention, the method for transmitting information further includes:
and step 106, after the received downlink control packet, feeding back an uplink acknowledgement control packet to the network side.
The downlink control packet carries tag information for identifying the downlink control packet, and the uplink acknowledgement control packet carries tag information which is the same as that of the downlink control packet received by the terminal last.
Wherein the marking information includes: the sequence number of the QoS flow corresponding to the downlink data packet
In a specific embodiment of the present invention, the method for transmitting information further includes:
and step 107, if the network side does not correctly receive the uplink data packet or the uplink acknowledgement control packet, re-receiving the downlink control packet re-sent by the network side.
The retransmitted downlink control packet has the same tag information as the downlink control packet transmitted last time or tag information obtained by adding a step length on the basis of the tag information of the downlink control packet transmitted last time.
Wherein, the downlink control packet and the uplink acknowledgement control packet are both fixed-length control packets; or the downlink control packet and the uplink acknowledgement control packet both carry indication information indicating that the packet is a control packet.
And the uplink acknowledgement control packet also carries acknowledgement information.
The embodiment of the method is a terminal side method, and corresponding to the method of the network side, all the implementations shown in fig. 3 to fig. 9 are applicable to the embodiment, and the same technical effect can be achieved.
An embodiment of the present invention further provides a network side device, including:
a processor, configured to generate a downlink control packet, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether to perform uplink data packet feedback by using a DRB that is the same as a data radio bearer DRB used for sending the downlink data packet when an uplink data packet is fed back after a terminal receives the downlink data packet;
and the transceiver is used for sending the downlink control packet to the terminal.
Wherein the transceiver is further configured to: sending the downlink data packet to a terminal; and receiving an uplink data packet fed back by the terminal after receiving the downlink data packet.
When the transceiver sends the downlink data packet to the terminal, the transceiver is specifically configured to: and mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal.
When the receiving terminal receives the uplink data packet fed back after the downlink data packet, the transceiver is specifically configured to: after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
It should be noted that the processor and the transceiver are also used for implementing all the implementation methods shown in fig. 3 to 9, and the same technical effect can be achieved.
An embodiment of the present invention further provides a terminal, including:
the transceiver is used for receiving a downlink control packet sent by a network side, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after the downlink data packet is received by a terminal.
Wherein the transceiver is further configured to: receiving a downlink data packet sent by a network side; and feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet.
When receiving a downlink data packet sent by a network side, the transceiver is specifically configured to: and receiving the downlink data packet sent by the network side through a third DRB.
When the transceiver feeds back the uplink data packet corresponding to the downlink data packet to the network side according to the downlink control packet, the transceiver is specifically configured to: after receiving the downlink data packet sent by the third DRB, an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the indication terminal feeds back the identifier of the designated first target DRB which is adopted by the uplink data packet corresponding to the Qos flow identifier; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the Qos flow identification by adopting the first target DRB.
It should be noted that all the implementations of the method on the terminal side are applicable to the embodiment of the terminal, and the same technical effects can be achieved.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. When the communication device is a network side device, the method of the network side as shown in fig. 3 to fig. 9 is executed. When the communication device is a terminal, the method of the terminal side is executed.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
In the above embodiment of the present invention, a dedicated downlink control packet is formed, so that the overhead of a data packet header is reduced and the reliability of control information is improved when the core network performs mapping from Qos flow to DRB, thereby effectively reducing RRC signaling.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (38)
1. A method for transmitting information, comprising:
generating a downlink control packet, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is used for uplink data packet feedback when the terminal receives the downlink data packet and feeds back the uplink data packet; the downlink control packet is used as a control PDU from the QoS flow to the DRB mapping layer;
sending the downlink control packet to a terminal;
wherein, after sending the downlink control packet to the terminal, the method further comprises:
sending the downlink data packet to a terminal;
receiving an uplink data packet fed back by the terminal after receiving the downlink data packet;
wherein the step of sending the downlink data packet to the terminal includes: mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal;
wherein, the step of the receiving terminal receiving the uplink data packet fed back after the downlink data packet comprises: after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the terminal is instructed to feed back the identification of the designated first target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the QoS flow identification by adopting the first target DRB.
2. The method for transmitting information according to claim 1, wherein the step of sending the downlink packet to the terminal includes:
and mapping the downlink data packet to a first DRB, and sending the downlink data packet to a terminal.
3. The method according to claim 2, wherein the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
receiving an uplink data packet fed back by the first DRB after the downlink data packet is received by the terminal; and when the terminal receives the downlink data packet and feeds back the uplink data packet corresponding to the QoS flow identifier, the terminal feeds back the first DRB adopted when the network side sends the downlink data packet.
4. The method for transmitting information according to claim 1, wherein the step of sending the downlink packet to the terminal includes:
and if the downlink data packet corresponding to the QoS flow identifier is mapped to the first DRB for transmission, the downlink data packet needs to be mapped to the second DRB for transmission, and the downlink data packet is mapped to the second DRB for transmission to the terminal.
5. The information transmission method according to claim 4, wherein before mapping the downlink data packet onto the second DRB and sending the downlink data packet to the terminal, the method further comprises:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
6. The method for transmitting information according to claim 5, wherein the step of receiving the uplink data packet fed back by the terminal after receiving the downlink data packet comprises:
and after receiving the downlink data packet, the receiving terminal receives the uplink data packet fed back on the second DRB.
7. The method for transmitting information according to claim 1, wherein the step of sending the downlink packet to the terminal includes:
and if the downlink data packet corresponding to the QoS flow identifier is mapped to a third DRB for transmission, the downlink data packet needs to be mapped to a fourth DRB for transmission, and the downlink data packet is mapped to the fourth DRB for transmission to the terminal.
8. The information transmission method according to claim 7, wherein before mapping the downlink data packet onto the fourth DRB and sending the downlink data packet to the terminal, the method further comprises:
regenerating a downlink control packet and sending the downlink control packet to the terminal; wherein, the regenerated downlink control packet carries: the QoS flow identification, the reflection identification and the identification of the designated second target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
9. The method for transmitting information according to claim 8, wherein the step of the receiving terminal receiving the uplink data packet fed back after the downlink data packet comprises:
and after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated second target DRB.
10. The method according to claim 1, wherein the step of sending the downlink control packet to the terminal comprises:
and encapsulating the downlink control packet into a packet data unit PDU, mapping the PDU to a DRB for sending the downlink data packet through an access network, and sending the PDU to a terminal.
11. The method for transmitting information according to claim 1, further comprising:
and receiving an uplink acknowledgement control packet fed back by the terminal after the received downlink control packet.
12. The information transmission method according to claim 11, wherein the downlink control packet carries tag information for identifying the downlink control packet, and the uplink ack control packet carries the same tag information as that of the downlink control packet received by the terminal.
13. The method of claim 12, wherein the flag information comprises: and the sequence number of the QoS flow corresponding to the downlink data packet.
14. The method for transmitting information according to claim 11, further comprising:
and if the network side does not correctly receive the uplink data packet or the uplink acknowledgement control packet, the network side retransmits the downlink control packet.
15. The information transmission method according to claim 14, wherein the retransmitted downlink control packet has the same flag information as the downlink control packet transmitted last time or the flag information obtained by adding one step to the flag information of the downlink control packet transmitted last time.
16. The method according to claim 11, wherein the downlink control packet and the uplink ack control packet are both fixed-length control packets; or
The downlink control packet and the uplink acknowledgement control packet both carry indication information indicating that the packet is a control packet.
17. The method according to claim 16, wherein the uplink ack control packet further carries ack information.
18. A method for transmitting information, comprising:
receiving a downlink control packet sent by a network side, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a Data Radio Bearer (DRB) used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after a terminal receives the downlink data packet; the downlink control packet is used as a control PDU from the QoS flow to the DRB mapping layer;
wherein the method further comprises:
receiving a downlink data packet sent by a network side;
feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet;
wherein, the step of receiving the downlink data packet sent by the network side comprises: receiving the downlink data packet sent by the network side through a third DRB;
wherein, the step of feeding back the uplink data packet corresponding to the downlink data packet to the network side according to the downlink control packet comprises: after receiving the downlink data packet sent by the third DRB, an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the terminal is instructed to feed back the identification of the designated first target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the QoS flow identification by adopting the first target DRB.
19. The method for transmitting information according to claim 18, wherein the step of receiving the downlink data packet sent by the network side includes:
and receiving the downlink data packet sent by the network side through the first DRB.
20. The method for transmitting information according to claim 19, wherein the step of feeding back, to the network side, the uplink data packet corresponding to the downlink data packet according to the downlink control packet includes:
feeding back an uplink data packet corresponding to the downlink data packet to a network side through the first DRB according to the downlink control packet; and when the terminal receives the downlink data packet and feeds back the uplink data packet corresponding to the QoS flow identifier, the terminal feeds back the first DRB adopted when the network side sends the downlink data packet.
21. The method for transmitting information according to claim 18, wherein the step of receiving the downlink data packet sent by the network side includes:
and receiving the downlink data packet sent by the network side by remapping the downlink data packet corresponding to the QoS flow identification on the second DRB by the first DRB.
22. The method for transmitting information according to claim 21, further comprising:
receiving a downlink control packet which is regenerated and sent by the network side before the network side sends the downlink data packet through the second DRB; wherein, the regenerated downlink control packet carries: and the QoS flow identifier and the reflection identifier are in a first state, and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal performs feedback by adopting the second DRB to which the downlink data packet is remapped.
23. The method for transmitting information according to claim 22, wherein the step of feeding back, to the network side, the uplink data packet corresponding to the downlink data packet according to the downlink control packet includes:
and after receiving the downlink data packet sent by the second DRB, feeding back an uplink data packet on the second DRB.
24. The method for transmitting information according to claim 18, wherein the step of receiving the downlink data packet sent by the network side includes:
and receiving the downlink data packet sent by the network side by remapping the downlink data packet corresponding to the QoS flow identification on the fourth DRB by the third DRB.
25. The method for transmitting information according to claim 24, further comprising:
receiving a downlink control packet which is generated and sent again by the network side before the network side sends the downlink data packet through the fourth DRB; wherein, the regenerated downlink control packet carries: the QoS flow identification, the reflection identification and the identification of the designated second target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification and fed back by the terminal; and when the terminal feeds back the uplink data packet after receiving the downlink data packet, the terminal feeds back the uplink data packet by adopting the second target DRB.
26. The method for transmitting information according to claim 25, wherein the step of feeding back, to the network side, the uplink data packet corresponding to the downlink data packet according to the downlink control packet includes:
and according to the downlink control packet, after receiving a downlink data packet through a fourth DRB, feeding back an uplink data packet on the second target DRB.
27. The method for transmitting information according to claim 18, wherein the step of receiving the downlink control packet sent by the network side includes:
and receiving a Packet Data Unit (PDU) sent by a network side through a data transmission link buffer (DRB) sending a downlink data packet, wherein the PDU is the PDU formed by encapsulating the downlink control packet by the network side.
28. The method for transmitting information according to claim 18, further comprising:
and after receiving the downlink control packet, feeding back an uplink acknowledgement control packet to the network side.
29. The information transmission method according to claim 28, wherein the downlink control packet carries tag information for identifying the downlink control packet, and the uplink ack control packet carries the same tag information as the downlink control packet received by the terminal.
30. The method of claim 29, wherein the flag information comprises: and the sequence number of the QoS flow corresponding to the downlink data packet.
31. The method for transmitting information according to claim 28, further comprising:
and re-receiving the downlink control packet retransmitted by the network side if the network side does not correctly receive the uplink data packet or the uplink acknowledgement control packet.
32. The information transmission method according to claim 31, wherein the retransmitted downlink control packet has the same flag information as the downlink control packet transmitted last time or the flag information obtained by adding one step to the flag information of the downlink control packet transmitted last time.
33. The method according to claim 28, wherein the downlink control packet and the uplink ack control packet are fixed-length control packets; or
The downlink control packet and the uplink acknowledgement control packet both carry indication information indicating that the packet is a control packet.
34. The method of claim 33, wherein the uplink ack control packet further carries ack information.
35. A network-side device, comprising:
a processor, configured to generate a downlink control packet, where the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether to perform uplink data packet feedback by using a DRB that is the same as a data radio bearer DRB used for sending the downlink data packet when feeding back an uplink data packet after a terminal receives the downlink data packet; the downlink control packet is used as a control PDU from the QoS flow to the DRB mapping layer;
the transceiver is used for sending the downlink control packet to a terminal;
wherein the transceiver is further configured to: sending the downlink data packet to a terminal; receiving an uplink data packet fed back by the terminal after receiving the downlink data packet;
wherein, when the transceiver sends the downlink data packet to the terminal, the transceiver is specifically configured to: mapping the downlink data packet to a third DRB, and sending the downlink data packet to a terminal;
when the receiving terminal receives the uplink data packet fed back after the downlink data packet, the transceiver is specifically configured to: after receiving the downlink data packet, the receiving terminal feeds back the uplink data packet through the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the terminal is instructed to feed back the identification of the designated first target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the QoS flow identification by adopting the first target DRB.
36. A terminal, comprising:
the transceiver is used for receiving a downlink control packet sent by a network side, wherein the downlink control packet carries a QoS flow identifier and a reflection identifier, the QoS flow identifier is a QoS flow identifier added when a downlink data packet from an application layer is mapped into a QoS flow, and the reflection identifier is an identifier indicating whether a DRB same as a data radio bearer DRB used for sending the downlink data packet is adopted for uplink data packet feedback when an uplink data packet is fed back after a terminal receives the downlink data packet; the downlink control packet is used as a control PDU from the QoS flow to the DRB mapping layer;
wherein the transceiver is further configured to: receiving a downlink data packet sent by a network side; feeding back an uplink data packet corresponding to the downlink data packet to a network side according to the downlink control packet;
when receiving a downlink data packet sent by a network side, the transceiver is specifically configured to: receiving the downlink data packet sent by the network side through a third DRB;
when the transceiver feeds back the uplink data packet corresponding to the downlink data packet to the network side according to the downlink control packet, the transceiver is specifically configured to: after receiving the downlink data packet sent by the third DRB, an uplink data packet fed back by the designated first target DRB; wherein, the reflection identifier in the downlink control packet is in a second state, and the downlink control packet further carries: the terminal is instructed to feed back the identification of the designated first target DRB which is adopted by the uplink data packet corresponding to the QoS flow identification; and after receiving the downlink data packet, the terminal feeds back the uplink data packet corresponding to the QoS flow identification by adopting the first target DRB.
37. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any one of claims 1-17, or the method of any one of claims 18-34.
38. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-17, or the method of any one of claims 18-34.
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| CN201710591248.3A CN109286574B (en) | 2017-07-19 | 2017-07-19 | Information transmission method, network side equipment and terminal |
| PCT/CN2018/095150 WO2019015510A1 (en) | 2017-07-19 | 2018-07-10 | Information transmission method, network side device and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710591248.3A CN109286574B (en) | 2017-07-19 | 2017-07-19 | Information transmission method, network side equipment and terminal |
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| CN109286574A CN109286574A (en) | 2019-01-29 |
| CN109286574B true CN109286574B (en) | 2022-04-29 |
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| CN111510263B (en) * | 2019-01-30 | 2023-05-09 | 中国移动通信有限公司研究院 | Remapping method, terminal and network side equipment |
| CN110677889B (en) * | 2019-09-24 | 2021-11-23 | 京信网络系统股份有限公司 | Data transmission method and device, access network equipment and readable storage medium |
| CN112866311A (en) * | 2019-11-26 | 2021-05-28 | 中兴通讯股份有限公司 | Method, system, network equipment and storage medium for simultaneous transmission of FTP (File transfer protocol) uplink and downlink services |
| WO2023092322A1 (en) * | 2021-11-24 | 2023-06-01 | 华为技术有限公司 | Method for sending uplink data packet and communication apparatus |
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| CN104902518A (en) * | 2014-03-06 | 2015-09-09 | 思科技术公司 | Devices and method using same EPS bearers in downlink and uplink |
| CN109150749A (en) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | A kind of data transmission method for uplink and relevant device |
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| CN104754750B (en) * | 2013-12-31 | 2018-10-19 | 华为终端（东莞）有限公司 | Resource allocation methods and device |
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| CN104902518A (en) * | 2014-03-06 | 2015-09-09 | 思科技术公司 | Devices and method using same EPS bearers in downlink and uplink |
| CN109150749A (en) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | A kind of data transmission method for uplink and relevant device |
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