CN109428836B - Data transmission method, network side equipment and user terminal - Google Patents
Data transmission method, network side equipment and user terminal Download PDFInfo
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- CN109428836B CN109428836B CN201710735691.3A CN201710735691A CN109428836B CN 109428836 B CN109428836 B CN 109428836B CN 201710735691 A CN201710735691 A CN 201710735691A CN 109428836 B CN109428836 B CN 109428836B
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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
- 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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Abstract
The invention provides a data transmission method, network side equipment and a user terminal, and belongs to the technical field of wireless communication. The data transmission method applied to the network side equipment comprises the following steps: when the mapping relation between QoS flow and DRB at the user terminal side is initially established or reconfigured, an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification is established; and sending the SDAP protocol data unit to the user terminal. The data transmission method applied to the user terminal comprises the following steps: receiving an SDAP protocol data unit sent by network side equipment, wherein the SDAP protocol data unit carries a QoS flow identifier and a corresponding DRB identifier; and acquiring the mapping relation between the QoS flow and the DRB according to the SDAP protocol data unit. The invention can inform the user terminal of the mapping relation from flow to DRB in a way of carrying QoS flow ID and DRB ID along with the path when the mapping relation from flow to DRB is changed.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a data transmission method, a network device, and a user terminal.
Background
The mapping relationship from QoS (quality of service) flow at the user terminal side to DRB (Data Radio Bearers) is configured by the network side device. In the prior art, if the mapping manner from the QoS flow to the DRB at the user terminal side is consistent with that at the network side, an indication identifier is carried along with the path in the downlink data packet at the network side to inform the user terminal to store the same mapping manner as that at the network side. If the mapping mode from the user terminal side QoS flow to the DRB changes, and the mapping mode from the user terminal side QoS flow to the DRB is inconsistent with the network side, the network side can only notify the mapping mode from the user terminal side QoS flow to the DRB through a Radio Resource Control (RRC) signaling configuration mode.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a data transmission method, a network side device and a user terminal, which can notify the user terminal of the mapping relationship from flow to DRB in a manner of carrying QoS flow ID and DRB ID along with the path when the mapping relationship from flow to DRB changes.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, a data transmission method is provided, which is applied to a network side device, and the data transmission method includes:
when the mapping relation between QoS flow and DRB at the user terminal side is initially established or reconfigured, an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification is established;
and sending the SDAP protocol data unit to a user terminal.
Further, sending the SDAP protocol data unit carrying the QoS flow identifier and the corresponding DRB identifier to the user terminal includes:
and adding a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and respectively placing the QoS flow identification and the corresponding DRB identification in the QoS flow identification field and the DRB identification field.
Further, the method further comprises:
and adding an indication bit identifier in the SDAP protocol data unit packet header, wherein the indication bit identifier is used for indicating whether the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier.
Further, the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
The embodiment of the invention also provides a data transmission method, which is applied to the user terminal and comprises the following steps:
receiving an SDAP protocol data unit sent by a network side device, wherein the SDAP protocol data unit carries a QoS flow identifier and a corresponding DRB identifier;
and acquiring the mapping relation between the QoS flow and the DRB according to the SDAP protocol data unit.
Further, after obtaining the mapping relationship between the QoS flow and the DRB, the method further includes:
and storing the mapping relation, and transmitting the data of the QoS flow corresponding to the QoS flow identification according to the mapping relation when the data of the QoS flow corresponding to the QoS flow identification needs to be transmitted.
The embodiment of the invention also provides a network side device, which comprises a processor and a transceiver,
the processor is used for establishing an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification when initially establishing or reconfiguring a mapping relation between QoS flow and DRB at a user terminal side;
the transceiver is used for sending the SDAP protocol data unit to a user terminal.
Further, the processor is specifically configured to add a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and place the QoS flow identification and the DRB identification corresponding thereto in the QoS flow identification field and the DRB identification field, respectively.
Further, the processor is further configured to add an indication bit identifier in the packet header of the SDAP protocol data unit, where the indication bit identifier is used to indicate whether the SDAP protocol data unit carries the QoS flow identifier and the DRB identifier.
Further, the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
The embodiment of the invention also provides a user terminal, which comprises a processor and a transceiver,
the transceiver is used for receiving an SDAP protocol data unit sent by network side equipment, and the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier;
and the processor is used for acquiring the mapping relation between the QoS flow and the DRB according to the SDAP protocol data unit.
Further, the processor is further configured to save the mapping relationship;
and the transceiver is further configured to transmit the data corresponding to the QoS flow identifier according to the mapping relationship when the data corresponding to the QoS flow identifier needs to be transmitted.
The embodiment of the invention also provides network side equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor implements the data transmission method as described above when executing the program.
The embodiment of the invention also provides a user terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor implements the data transmission method as described above when executing the program.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the data transmission method described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, when initially establishing or reconfiguring the mapping relationship between the QoS flow and the DRB at the user terminal, the network side device establishes the SDAP protocol data unit carrying the QoS flow identifier and the corresponding DRB identifier, and sends the SDAP protocol data unit to the user terminal, so that when the mapping manner from the QoS flow to the DRB changes, the user terminal can be notified by the mapping manner carrying the QoS flow identifier and the corresponding DRB identifier along the path without introducing RRC signaling configuration of the mapping manner from the QoS flow to the DRB.
Drawings
Fig. 1-2 are schematic flow charts of data transmission methods according to embodiments of the present invention;
fig. 3 is an interaction diagram of a base station and a user equipment according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a user terminal according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
Embodiments of the present invention provide a data transmission method, a network side device, and a user terminal, which can notify a user terminal of a mapping relationship from flow to DRB in a manner of carrying QoS flow ID and DRB ID along a path when the mapping relationship from flow to DRB changes.
An embodiment of the present invention provides a data transmission method, which is applied to a network side device, and as shown in fig. 1, the data transmission method includes:
step 101: when the mapping relation between QoS flow and DRB at the user terminal side is initially established or reconfigured, an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification is established;
step 102: and sending the SDAP protocol data unit to a user terminal.
In this embodiment, when initially establishing or reconfiguring a mapping relationship between QoS flow and DRB at a user terminal, a network side device establishes an SDAP protocol data unit carrying a QoS flow identifier and a corresponding DRB identifier, and sends the SDAP protocol data unit to the user terminal, so that when a mapping manner from QoS flow to DRB changes, it is not necessary to introduce RRC signaling to configure a mapping manner from QoS flow to DRB, and the user terminal can be notified by a mapping manner carrying the QoS flow identifier and the corresponding DRB identifier along a path.
Further, sending the SDAP protocol data unit carrying the QoS flow identifier and the corresponding DRB identifier to the user terminal includes:
and adding a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and respectively placing the QoS flow identification and the corresponding DRB identification in the QoS flow identification field and the DRB identification field.
Further, the method further comprises:
and adding an indication bit identifier in the SDAP protocol data unit packet header, wherein the indication bit identifier is used for indicating whether the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier.
Further, the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
An embodiment of the present invention further provides a data transmission method, which is applied to a user terminal, and as shown in fig. 2, the data transmission method includes:
step 201: receiving an SDAP protocol data unit sent by a network side device, wherein the SDAP protocol data unit carries a QoS flow identifier and a corresponding DRB identifier;
step 202: and acquiring the mapping relation between the QoS flow and the DRB according to the SDAP protocol data unit.
In this embodiment, when initially establishing or reconfiguring a mapping relationship between QoS flow and DRB at a user terminal, a network side device establishes an SDAP protocol data unit carrying a QoS flow identifier and a corresponding DRB identifier, and sends the SDAP protocol data unit to the user terminal, so that when a mapping manner from QoS flow to DRB changes, it is not necessary to introduce RRC signaling to configure a mapping manner from QoS flow to DRB, and the user terminal can be notified by a mapping manner carrying the QoS flow identifier and the corresponding DRB identifier along a path.
Further, after obtaining the mapping relationship between the QoS flow and the DRB, the method further includes:
and storing the mapping relation, and transmitting the data of the QoS flow corresponding to the QoS flow identification according to the mapping relation when the data of the QoS flow corresponding to the QoS flow identification needs to be transmitted.
The data transmission method of the present invention is described in detail below with reference to fig. 3:
in this embodiment, when the network side device initially establishes the mapping relationship from the QoS Flow to the DRB on the ue side, or reconfigures the mapping relationship from the QoS Flow to the DRB on the ue side, the network side device notifies the ue side of the mapping relationship in a manner of adding a QFI (QoS Flow ID, quality of service Flow identifier) field and a DRB ID (identity) field to a packet header of an SDAP PDU (protocol data unit). Wherein, QFI can be filled in the QFI field, DRB ID can be filled in the DRB ID field, and QoS flow corresponding to the filled QFI can be mapped to DRB corresponding to the filled DRB ID.
The QoS flow corresponding to the DRB carrying the mapping message may be the same as the mapping from the carried QoS flow to the DRB, and the mapped DRB may also be the same, but is not limited to the same.
In the existing protocol, DRB ID is an integer from 1 to 32, so the DRB ID field needs at least 5 bits long, and the QFI field needs at least 1bit long. Since the QFI and DRB ID carried by the embodiment are both for the purpose of notifying the user terminal, it is not only the change of mapping relationship for the Qos flow itself used for transmission. So the header of the SDAP PDU as shown in Table 1 and Table 2 is distinguished by "QFI _" from the QFI information carried in the SDAP PDU indicating the corresponding of the DRB. In a specific embodiment, the formats of the QFI field and the DRB ID field in the SDAP PDU header are shown in table 1:
TABLE 1
In table 1, the QFI field occupies 1bit, and the DRB ID field occupies 5 bits, so 4 bits are left before the QFI field and are padded with R.
In addition, considering that the frequency of the change of the mapping relationship is not high, the method of always carrying the mapping relationship in the SDAP PDU header may cause the waste of the header resources, and therefore, whether the mapping relationship is carried in the SDAP PDU header may be indicated by the indication bit identifier. As shown in table 2, the indication bit M with 1bit indicates whether the mapping relationship is carried in the packet header of the SDAP PDU, for example, when M is equal to 0, the mapping relationship is not carried in the packet header of the SDAP PDU, and when M is equal to 1, the mapping relationship is carried in the packet header of the SDAP PDU. When the SDAP PDU header does not carry the mapping relationship, the QFI field and the DRB ID field can be used for transmitting other data.
TABLE 2
As shown in fig. 3, after the network side device initially establishes or reconfigures the mapping relationship, the network side device sends an SDAP PDU carrying the QFI and the DRB ID to a UE (user terminal). When the UE does not have data from the QoS flow corresponding to the QFI to be transmitted, the mapping relation is stored or the originally stored mapping relation is replaced; when the UE is transmitting the QoS flow data corresponding to the QFI, the UE modifies the original mapping relation and transmits the data according to the new mapping relation when receiving and analyzing the SDAP PDU carrying the new mapping relation.
In addition, when the format of the SDAP PDU packet header is shown in Table 2, after receiving the SDAP PDU packet header, the UE firstly judges whether the SDAP PDU packet header carries the mapping relation from the QoS flow to the DRB or not through the M bit, and if the SDAP PDU packet header does not carry the mapping relation from the QoS flow to the DRB through the M bit, the mapping relation from the QoS flow to the DRB is not obtained any more; and if the mapping relation from the QoS flow to the DRB is judged to be carried in the SDAP PDU header through the M bit, the SDAP PDU header is analyzed, and the mapping relation from the QoS flow to the DRB is obtained.
An embodiment of the present invention further provides a network-side device, as shown in fig. 4, including a processor 31 and a transceiver 32,
the processor 31 is configured to establish an SDAP protocol data unit carrying a QoS flow identifier and a corresponding DRB identifier when initially establishing or reconfiguring a mapping relationship between a QoS flow and a DRB at a user terminal side;
the transceiver 32 is configured to send the SDAP protocol data unit to a user terminal.
In this embodiment, when initially establishing or reconfiguring a mapping relationship between QoS flow and DRB at a ue, a network device establishes an SDAP protocol data unit carrying a QoS flow identifier and a corresponding DRB identifier, and sends the SDAP protocol data unit to the ue, so that when a mapping manner from QoS flow to DRB changes, an RRC signaling is not required to be introduced to configure a mapping manner from QoS flow to DRB, and the ue can be notified by a mapping manner carrying the QoS flow identifier and the corresponding DRB identifier along a path.
Further, the processor 31 is specifically configured to add a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and place the QoS flow identification and the DRB identification corresponding thereto in the QoS flow identification field and the DRB identification field, respectively.
Further, the processor 31 is further configured to add an indication bit identifier in the packet header of the SDAP protocol data unit, where the indication bit identifier is used to indicate whether the SDAP protocol data unit carries the QoS flow identifier and the DRB identifier.
Further, the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
An embodiment of the present invention further provides a user terminal, as shown in fig. 5, including a processor 41 and a transceiver 42,
the transceiver 42 is configured to receive an SDAP protocol data unit sent by a network side device, where the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier;
the processor 41 is configured to obtain a mapping relationship between QoS flow and DRB according to the SDAP protocol data unit.
In this embodiment, when initially establishing or reconfiguring a mapping relationship between QoS flow and DRB at a user terminal, a network side device establishes an SDAP protocol data unit carrying a QoS flow identifier and a corresponding DRB identifier, and sends the SDAP protocol data unit to the user terminal, so that when a mapping manner from QoS flow to DRB changes, it is not necessary to introduce RRC signaling to configure a mapping manner from QoS flow to DRB, and the user terminal can be notified by a mapping manner carrying the QoS flow identifier and the corresponding DRB identifier along a path.
Further, the processor 41 is further configured to save the mapping relationship;
the transceiver 42 is further configured to transmit the data corresponding to the QoS flow identifier according to the mapping relationship when the data corresponding to the QoS flow identifier needs to be transmitted.
The embodiment of the invention also provides network side equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor implements the data transmission method as described above when executing the program.
The embodiment of the invention also provides a user terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor implements the data transmission method as described above when executing the program.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the data transmission method as described above.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (11)
1. A data transmission method is applied to network side equipment, and is characterized in that the data transmission method comprises the following steps:
when the mapping relation between QoS flow and DRB at the user terminal side is initially established or reconfigured, an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification is established;
sending the SDAP protocol data unit to a user terminal, including: and adding a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and respectively placing the QoS flow identification and the corresponding DRB identification in the QoS flow identification field and the DRB identification field.
2. The method of claim 1, further comprising:
and adding an indication bit identifier in the SDAP protocol data unit packet header, wherein the indication bit identifier is used for indicating whether the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier.
3. The data transmission method according to claim 1, wherein the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
4. A data transmission method is applied to a user terminal, and is characterized in that the data transmission method comprises the following steps:
receiving an SDAP protocol data unit sent by a network side device, wherein the SDAP protocol data unit carries a QoS flow identifier and a corresponding DRB identifier;
acquiring a mapping relation between QoS flow and DRB according to the SDAP protocol data unit;
and storing the mapping relation, and transmitting the data of the QoS flow corresponding to the QoS flow identification according to the mapping relation when the data of the QoS flow corresponding to the QoS flow identification needs to be transmitted.
5. A network side device, comprising a processor and a transceiver,
the processor is used for establishing an SDAP protocol data unit carrying a QoS flow identification and a corresponding DRB identification when initially establishing or reconfiguring a mapping relation between QoS flow and DRB at a user terminal side;
the transceiver is used for sending the SDAP protocol data unit to a user terminal;
the processor is specifically configured to add a QoS flow identification field and a DRB identification field in the SDAP protocol data unit packet header, and place the QoS flow identification and the DRB identification corresponding thereto in the QoS flow identification field and the DRB identification field, respectively.
6. The network-side device of claim 5,
the processor is further configured to add an indication bit identifier in the SDAP protocol data unit packet header, where the indication bit identifier is used to indicate whether the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier.
7. The network-side device of claim 5,
the length of the DRB identification field is not less than 5 bits, and the length of the QoS flow identification field is not less than 1 bit.
8. A user terminal, comprising a processor and a transceiver,
the transceiver is used for receiving an SDAP protocol data unit sent by network side equipment, and the SDAP protocol data unit carries a QoS flow identifier and a DRB identifier;
the processor is used for acquiring the mapping relation between the QoS flow and the DRB according to the SDAP protocol data unit;
the processor is further configured to save the mapping relationship;
and the transceiver is further configured to transmit the data corresponding to the QoS flow identifier according to the mapping relationship when the data corresponding to the QoS flow identifier needs to be transmitted.
9. A network-side device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the data transmission method according to any one of claims 1-3 when executing the program.
10. A user terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor, when executing the program, implements the data transmission method of claim 4.
11. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps in the data transmission method according to any one of claims 1 to 3 or which program, when being executed by a processor, carries out the steps in the data transmission method according to claim 4.
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| WO2014075265A1 (en) * | 2012-11-15 | 2014-05-22 | 华为技术有限公司 | Method, user equipment and base station for transmitting data |
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| CN102291763A (en) * | 2011-07-22 | 2011-12-21 | 电信科学技术研究院 | Method, system and equipment for determining mapping relation and reporting quality of service (QoS) measurement information |
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