CN110621069A

CN110621069A - Data transmission method, equipment and system

Info

Publication number: CN110621069A
Application number: CN201810629605.5A
Authority: CN
Inventors: 张艳霞; 吴昱民
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-06-19
Filing date: 2018-06-19
Publication date: 2019-12-27
Anticipated expiration: 2038-06-19
Also published as: WO2019242451A1; CN110621069B

Abstract

The embodiment of the invention discloses a data transmission method, equipment and a system, which relate to the technical field of communication and aim to solve the problem that the quantity of reserved LCIDs can not meet the requirement of expansion, so that better service quality can not be provided. The method comprises the following steps: acquiring a first identifier, wherein the first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling a first transmission channel, N is an integer greater than 16; and sending data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier. The method can be applied to a scene of data transmission between the UE and the access network equipment.

Description

Data transmission method, equipment and system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a data transmission method, equipment and a system.

Background

Currently, there are 64 Logical Channel Identities (LCIDs) in the fifth Generation wireless communication (5-Generation, 5G) system. For downlink data transmission, a downlink logical channel occupies 32 LCIDs (called legacy LCIDs), a downlink Medium Access Control (MAC) control unit occupies 17 LCIDs, and the remaining 15 LCIDs are reserved LCIDs. For uplink data transmission, an uplink logical channel occupies 32 LCIDs, an uplink MAC control unit occupies 10 LCIDs, and the remaining 22 LCIDs are reserved LCIDs.

In order to improve the reliability of data transmission, a Packet Data Convergence Protocol (PDCP) packet replication function is introduced into a 5G New Radio (NR) system. I.e., for radio bearers including Data Radio Bearers (DRBs) and Signaling Radio Bearers (SRBs), the network device may configure the PDCP packet duplication function for these radio bearers. Specifically, after data transmitted by one radio bearer is copied by a PDCP entity in a PDCP layer, original data and the copied data are respectively transmitted to two different Radio Link Control (RLC) entities. In a Carrier Aggregation (CA) scenario, the two RLC entities are in the same cell group and correspond to different logical channels, and the different logical channels have different LCIDs.

However, according to the current protocol, in the worst case (supporting 8 CA DRB duplicate and 2 CA SRB duplicate), the legacy LCID can only support at most 19 DRBs established between the User Equipment (UE) and the network device, so as to increase the service requirement of the UE, if it is necessary to support more DRBs established between the UE and the network device, the number of the reserved LCIDs may not satisfy the extended requirement, and thus the better service quality may not be provided.

Disclosure of Invention

Embodiments of the present invention provide a data transmission method, device, and system, to solve a problem that a number of reserved LCIDs may not meet an expansion requirement, so that a better service quality cannot be provided.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides a data transmission method, where the method may be applied to a UE, and the method includes: acquiring a first identifier, wherein the first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling a first transmission channel, N is an integer greater than 16; and sending first data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier.

In a second aspect, an embodiment of the present invention provides a data transmission method, where the method may be applied to an access network device, and the method includes: sending a first identifier to the UE, wherein the first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling a first transmission channel, N is an integer greater than 16; and receiving first data sent by the UE on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier.

In a third aspect, an embodiment of the present invention provides a UE, where the UE includes an obtaining module and a sending module. An obtaining module, configured to obtain a first identifier, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling a first transmission channel, N is an integer greater than 16; and a sending module, configured to send first data on the logical channel indicated by the first identifier obtained by the obtaining module or the first transmission channel scheduled by the first identifier.

In a fourth aspect, an embodiment of the present invention provides an access network device, where the access network device includes a sending module and a receiving module. A sending module, configured to send a first identifier to a UE, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling a first transmission channel, N is an integer greater than 16; and a receiving module, configured to receive first data sent by the UE on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier.

In a fifth aspect, an embodiment of the present invention provides a UE, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the data transmission method provided in the first aspect.

In a sixth aspect, an embodiment of the present invention provides an access network device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when executed by the processor, the computer program implements the steps of the data transmission method provided in the second aspect.

In a seventh aspect, an embodiment of the present invention provides a communication system, where the communication system includes the UE in the third aspect and the access network device in the fourth aspect. Alternatively, the communication system includes the UE in the fifth aspect and the access network device in the sixth aspect.

In an eighth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the data transmission method in the first aspect or the second aspect.

In this embodiment of the present invention, a first identifier (where the first identifier is used to indicate a logical channel or schedule a first transport channel, and a domain where the first identifier is located includes N bits; if the first identifier is used to indicate a logical channel, N is an integer greater than 6, or if the first identifier is used to schedule a first transport channel, N is an integer greater than 16) may be obtained, and first data may be sent on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier. Through the scheme, on one hand, compared with the prior art that the domain where the logical channel identifier is located includes 6 bits, because the number of the bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 6, the embodiment of the present invention expands the number of bits used for indicating the domain where the logical channel identifier is located, so that it is possible to support establishment of more radio bearers between the UE and the access network device. On the other hand, compared with the prior art that the domain where the cell radio network temporary identifier is located includes 16 bits, because the number of bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 16, the embodiment of the present invention expands the number of bits used for scheduling the domain where the identifier of the transmission channel is located, so that the access network device can schedule more transmission channels for the UE, thereby supporting establishment of more radio bearers between the UE and the access network device. That is, in the embodiment of the present invention, since more radio bearers can be established between the UE and the access network device, the increasing service requirement of the UE can be satisfied, and better service quality is provided.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a data transmission method according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a first identifier according to an embodiment of the present invention;

fig. 4 is a second schematic diagram of the first identifier according to the embodiment of the present invention;

fig. 5 is a third schematic diagram of the first identifier according to the embodiment of the present invention;

fig. 6 is a second schematic diagram of a data transmission method according to an embodiment of the present invention;

fig. 7 is a third schematic diagram of a data transmission method according to an embodiment of the present invention;

fig. 8 is a fourth schematic diagram of a data transmission method according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an access network device according to an embodiment of the present invention;

fig. 11 is a hardware diagram of a UE according to an embodiment of the present invention;

fig. 12 is a hardware schematic diagram of an access network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The term "and/or" herein is an association relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, a/B denotes a or B.

The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first transport channel and the second transport channel, etc. are used to distinguish different transport channels, rather than to describe a particular order of transport channels.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, unless otherwise specified, "a plurality" means two or more, for example, a plurality of processing units means two or more processing units, and the like.

Embodiments of the present invention provide a data transmission method, device, and system, which may obtain a first identifier (where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used to indicate a logical channel, N is an integer greater than 6, or if the first identifier is used to schedule a first transmission channel, N is an integer greater than 16), and send first data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier. Through the scheme, on one hand, compared with the prior art that the domain where the logical channel identifier is located includes 6 bits, because the number of the bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 6, the embodiment of the present invention expands the number of bits used for indicating the domain where the logical channel identifier is located, so that it is possible to support establishment of more radio bearers between the UE and the access network device. On the other hand, compared with the prior art that the domain where the cell radio network temporary identifier is located includes 16 bits, because the number of bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 16, the embodiment of the present invention expands the number of bits used for scheduling the domain where the identifier of the transmission channel is located, so that the access network device can schedule more transmission channels for the UE, thereby supporting establishment of more radio bearers between the UE and the access network device. That is, in the embodiment of the present invention, since more radio bearers can be established between the UE and the access network device, the increasing service requirement of the UE can be satisfied, and better service quality is provided.

The data transmission method, the equipment and the system provided by the embodiment of the invention can be applied to a communication system. For example, when the first identifier is LCID, the method may be specifically applied to a process of transmitting data between the UE and the network device based on the communication system.

Fig. 1 illustrates an architecture diagram of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system may include a UE 01 and an access network device 02. Wherein, the connection between the UE 01 and the access network device 02 can be established.

It should be noted that, in the embodiment of the present invention, the UE 01 and the access network device 02 shown in fig. 1 may be in a wireless connection.

A UE is a device that provides voice and/or data connectivity to a user, a handheld device with wired/wireless connectivity, or other processing device connected to a wireless modem. A UE may communicate with one or more core Network devices via a Radio Access Network (RAN). The UE may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, or a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, that exchanges speech and/or data with the RAN, such as a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and so on. A UE may also be referred to as a User Agent (User Agent) or a terminal device, etc.

An access network device is a device deployed in a RAN for providing wireless communication functionality for a UE. In the embodiment of the present invention, the access network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices that function as base stations may differ. For example, in a 5G system, it may be referred to as a 5G base station (gNB); in a fourth Generation wireless communication (4-Generation, 4G) system, such as a Long Term Evolution (LTE) system, it may be referred to as an evolved NodeB (eNB); in a third generation mobile communication (3G) system, it may be referred to as a base station (Node B). As communication technology evolves, the name "base station" may change.

The data transmission method, device and system provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides a data transmission method, which may include steps 201 to 203 described below, as shown in fig. 2.

Step 201, the UE acquires a first identifier.

The first identifier may be used to indicate a logical channel or schedule a first transmission channel, and a field in which the first identifier is located includes N bits. If the first identifier is used for indicating a logical channel, N is an integer greater than 6; alternatively, if the first identifier is used for scheduling the first transport channel, N is an integer greater than 16.

Optionally, in this embodiment of the present invention, when the first identifier is used to indicate a logical channel, the first identifier may be a Logical Channel Identifier (LCID). In case the first identity is used for scheduling a first transport channel, the first identity may be a cell radio network temporary identity (C-RNTI).

It should be noted that, in the case that the first identifier is used to indicate a logical channel, the domain in which the LCID (i.e., the first identifier) provided in the embodiment of the present invention is located includes N bits (N is an integer greater than 6), unlike the domain in which the LCID is located includes 6 bits in the prior art. In the case that the first identifier is used for scheduling the first transmission channel, the domain where the C-RNTI (i.e. the first identifier) provided by the embodiment of the present invention includes N bits (N is an integer greater than 16), unlike the domain where the C-RNTI includes 16 bits in the prior art.

Optionally, in this embodiment of the present invention, the first identifier may be defined in a communication protocol, and may also be configured by the access network device for the UE. Specifically, if the first identifier is defined in the communication protocol, the UE may obtain the first identifier by reading the communication protocol; if the first identity is configured for the UE by the access network device, the UE may receive the first identity from the access network device. The method and the device can be determined according to actual use requirements, and the embodiment of the invention is not limited.

It can be understood that, when the access network device configures the first identifier for the UE, the access network device may read the first identifier from the communication protocol, and the access network device may also obtain the first identifier in other possible manners. The method and the device can be determined according to actual use requirements, and the embodiment of the invention is not limited.

Optionally, in this embodiment of the present invention, when the first identifier is used to indicate a logical channel, the N bits may include a first bit, and the first bit may be a reserved bit or an extended bit in the MAC subheader.

It should be noted that, in the embodiment of the present invention, the reserved bit or the extended bit may be a free bit in the MAC subheader, that is, a bit that is not occupied yet. Further, the reserved bit may be an original idle bit in the MAC subheader; the extended bit can be a newly added idle bit in the MAC subheader.

It can be understood that, under the condition that the first identifier is used for indicating a logical channel, because the first bit of the N bits is a reserved bit or an extended bit in the MAC subheader, the embodiment of the present invention extends the number of bits included in the domain where the LCID is located, thereby solving the problem that the number of LCIDs in the prior art may not satisfy transmission, and thus, supporting establishment of more radio bearers between the UE and the access network device, and further satisfying the increasing UE service requirements.

Further, in this embodiment of the present invention, in a case that the first bit is a reserved bit in the MAC subheader, the N bits may be 6+ M bits, and the first bit may be M bits of the 6+ M bits. Wherein M is a positive integer.

For example, M can be 1, 2, or 3, etc. The method and the device can be determined according to actual use requirements, and the embodiment of the invention is not limited.

Illustratively, fig. 3 is a schematic diagram of examples of several first identifiers provided in the embodiment of the present invention. In the case that the first identifier is an LCID and the first bit is a reserved bit in the MAC subheader, assuming that M is 1, the domain in which the first identifier is located may include 7 bits and the first bit may be 1 reserved bit of the 7 bits. Specifically, as shown in fig. 3 (a) or fig. 3 (b), the 1 reserved bit may be 1 bit adjacent to the "F" field in the field where the LCID is located (i.e., a bit corresponding to "1" as shown in fig. 3 (a) or fig. 3 (b)). As shown in fig. 3 (c), the 1 reserved bit may be 1 bit adjacent to the "R" field in the field where the LCID is located (i.e., a bit corresponding to "1" as shown in fig. 3 (c)). Wherein "L" is used to indicate a length of a Service Data Unit (SDU) or a control message; "R" is a reserved bit; the "F" is used to indicate whether the length of the SDU or the control message is greater than 128 bytes, specifically, if F is 1, the "F" is used to indicate that the length of the SDU or the control message is greater than 128 bytes, and if F is 0, the "F" is used to indicate that the length of the SDU or the control message is less than or equal to 128 bytes.

It can be understood that, in the case that the first identifier is used to indicate a logical channel, by setting the reserved bits in the MAC subheader to the first bits, normal use of the MAC subheader can be ensured, and the number of bits in the domain where the first identifier is located can also be extended. Therefore, the problem that the number of LCIDs in the prior art can not meet transmission is solved, more radio bearers can be established between the UE and the access network equipment, and the growing UE service requirements can be met.

Further, in this embodiment of the present invention, when the first bit is an extended bit in the MAC subheader, the N bits are 6+8 × K bits, and the first bit is a bit corresponding to K bytes in the 6+8 × K bits. Wherein K is a positive integer.

For example, K can be 1, 2, or 3, etc. The method and the device can be determined according to actual use requirements, and the embodiment of the invention is not limited.

Exemplarily, fig. 4 is a schematic diagram of examples of other first identifiers provided by an embodiment of the present invention. In the case that the first identifier is an LCID and the first bit is an extension bit in the MAC subheader, assuming that K is 1, the domain in which the first identifier is located may include 14 bits, and the first bit may be a bit corresponding to 1 extension byte in the 14 bits. Specifically, as shown in fig. 4 (a), fig. 4 (b), or fig. 4 (c), the 14 bits may include 6 bits corresponding to LCID (1) and 8 bits corresponding to LCID (2), and the bit corresponding to the 1 extension byte may be 8 bits corresponding to LCID (2). Wherein "L" is used to indicate a length of a Service Data Unit (SDU) or a control message; "R" is a reserved bit; the "F" is used to indicate whether the length of the SDU or the control message is greater than 128 bytes, specifically, if F is 1, the "F" is used to indicate that the length of the SDU or the control message is greater than 128 bytes, and if F is 0, the "F" is used to indicate that the length of the SDU or the control message is less than or equal to 128 bytes.

It can be understood that, in the case that the first identifier is used to indicate a logical channel, by using the extension bit in the MAC subheader as the first bit, the normal use of the MAC subheader can be ensured, and the bit number of the domain where the first identifier is located can also be extended. Therefore, the problem that the number of LCIDs in the prior art can not meet transmission is solved, more radio bearers can be established between the UE and the access network equipment, the growing UE service requirements can be met, and better service quality is provided.

Optionally, in this embodiment of the present invention, when the first identifier is used to schedule the first transmission channel, the N bits may be 8 × T bits, and T is an integer greater than 2.

Exemplarily, fig. 5 is a schematic diagram of examples of other first identifiers provided by an embodiment of the present invention. In case the first identity is a C-RNTI, the field in which the first identity is located may comprise 24 bits, assuming that T is 3. Specifically, as shown in fig. 5 (a), the 24 bits may include bits corresponding to C-RNTI (1), C-RNTI (2), and C-RNTI (3), and 8 bits corresponding to C-RNTI (3) may be bits corresponding to an extended byte. It will be appreciated that T may also be other possible integer values (e.g. 4, 5 or 6, etc.) in case the first identity is C-RNTI. As shown in fig. 5 (b), the field in which the first identifier is located may include 8 × T bits, and the 8 × T bits may include corresponding bits of C-RNTI (1), C-RNTI (2), … …, and C-RNTI (T).

It can be understood that, under the condition that the first identifier is used for scheduling the first transmission channel, the access network device can schedule more transmission channels for the UE by expanding the bit number of the domain where the first identifier is located, so that more radio bearers can be established between the UE and the access network device, and further, the increasing service requirements of the UE can be met, and better service quality can be provided.

Step 202, the UE sends the first data on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier.

Optionally, in this embodiment of the present invention, the first data may be data or a data packet carried on a first radio bearer, that is, the first radio bearer may be a data radio bearer.

In the embodiment of the present invention, when the first identifier is used to indicate a logical channel, the UE may send the first data carried on the first radio bearer on the logical channel indicated by the first identifier. In case the first identifier is used for scheduling a first transport channel, the UE may send first data carried on a first radio bearer on the first transport channel according to the first identifier.

Optionally, before the UE sends data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier, the data transmission method provided in the embodiment of the present invention may further include: and establishing a first radio bearer between the UE and the access network equipment, wherein the first radio bearer corresponds to a logical channel or a first transmission channel.

Step 203, the access network equipment receives the first data sent by the UE on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier.

On one hand, compared with the prior art that the domain in which the logical channel identifier is located includes 6 bits, the data transmission method provided by the embodiment of the present invention extends the number of bits used for indicating the domain in which the logical channel identifier is located, so that it can support establishment of more radio bearers between the UE and the access network device. On the other hand, compared with the prior art that the domain where the cell radio network temporary identifier is located includes 16 bits, because the number of bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 16, the embodiment of the present invention expands the number of bits used for scheduling the domain where the identifier of the transmission channel is located, so that the access network device can schedule more transmission channels for the UE, thereby supporting establishment of more radio bearers between the UE and the access network device. That is, in the embodiment of the present invention, since more radio bearers can be established between the UE and the access network device, the increasing service requirement of the UE can be satisfied, and better service quality is provided.

Optionally, with reference to fig. 2, as shown in fig. 6, in the embodiment of the present invention, the step 201 may be specifically implemented by a step 201A described below. Before step 201A, the data transmission method provided in the embodiment of the present invention may further include step 204.

Step 204, the access network device sends the first identifier to the UE.

Step 201A, UE receives the first identification.

The first identifier may be used to instruct the UE to transmit the first data on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier.

For the specific description of the first identifier, reference may be made to the related description of the first identifier in step 201 in the foregoing embodiment, and details are not repeated here.

For example, in a case where the first identifier is used to indicate a logical channel, a method for an access network device (e.g., a base station) to send the first identifier to a UE may include: the access network device may send Radio Resource Control (RRC) signaling to the UE, where the RRC signaling may include DRB information, and the DRB information may include the first identifier. The UE may thus receive the first identifier and send the first data carried on the first radio bearer on the logical channel indicated by the first identifier.

For example, where the first identifier is used to schedule a first transport channel, the access network device (e.g., base station) may send the first identifier to the UE, where the first identifier may be used to schedule a newly defined transport channel (i.e., the first identifier may be used to schedule a newly added transport channel). Specifically, different from an existing downlink shared channel (DL-SCH) and an existing uplink shared channel (UL-SCH), the newly defined downlink shared channel provided in the embodiment of the present invention may be a downlink shared channel-bis (DL-SCH-bis) and the newly defined uplink shared channel may be an uplink shared channel-bis (UL-SCH-bis). The UE may thus receive the first identification and transmit first data carried on the first radio bearer on either UL-SCH-bis or DL-SCH-bis.

In the data transmission method provided in the embodiment of the present invention, the UE may receive the first identifier sent by the access network device, and send the first data carried on the first radio bearer on the logical channel indicated by the first identifier, or the UE may send the first data carried on the first radio bearer on the first transmission channel according to the first identifier.

Optionally, with reference to fig. 6, as shown in fig. 7, in the embodiment of the present invention, when the first identifier is used for scheduling the first transmission channel, the step 204 may be specifically implemented by a step 204A described below. In this case, step 202 may be specifically realized by step 202A described below.

Step 204A, the access network equipment sends a first identifier to the UE under the condition that the number of the target radio bearers is greater than or equal to a first threshold value.

The target radio bearer may include a radio bearer established between the UE and the access network device and a radio bearer to be established between the UE and the access network device.

For example, in the embodiment of the present invention, the number of the target radio bearers may be 8 or 16. The method and the device can be determined according to actual use requirements, and the embodiment of the invention is not limited.

Step 202A, UE transmits first data on the first transport channel identified as scheduled.

In the data transmission method provided in the embodiment of the present invention, the access network device may send the first identifier to the UE when the number of the target radio bearers is greater than or equal to the first threshold, so that the UE may send the first data carried on the first radio bearer on the first transmission channel according to the first identifier. That is, the access network device may schedule more transmission channels for the UE, so as to support establishment of more radio bearers between the U and the access network device, thereby meeting the increasing UE service requirements and providing better service quality.

Optionally, with reference to fig. 7, as shown in fig. 8, in the embodiment of the present invention, in a case that the first identifier is used to schedule the first transmission channel, the data transmission method provided in the embodiment of the present invention may further include steps 205 to 208 described below.

Step 205, the access network device sends the second identifier to the UE.

The second identifier may be used to schedule a second transport channel, where the second identifier and the first identifier belong to the same domain, and the second identifier may be used for the UE to send data on the second transport channel.

Step 206, the UE receives the second identity.

Step 207, the UE transmits the second data on the second transmission channel scheduled by the second identifier.

Step 208, the access network equipment receives the second data sent by the UE on the second transport channel scheduled by the second identifier.

It should be noted that, in the embodiment of the present invention, the first identifier and the second identifier may be different identifiers. The first transport channel and the second transport channel may be different transport channels. The first data and the second data may be different data.

For example, assuming that the second transport channel scheduled by the second identifier is the UL-SCH or DL-SCH in step 204 and step 201A, after the access network device sends the second identifier to the UE, the UE may receive the second identifier and send second data on the UL-SCH or DL-SCH, that is, the UE may receive the second identifier and send second data carried on a second radio bearer (the second radio bearer corresponds to the second transport channel) on the UL-SCH or DL-SCH.

In the data transmission method provided by the embodiment of the present invention, the access network device may send the second identifier to the UE, and the UE may send data on the second transmission channel scheduled by the second identifier. Therefore, the access network equipment can schedule the first transmission channel and the second transmission channel for the UE, that is, the access network equipment can schedule more transmission channels for the UE, so that more radio bearers can be established between the UE and the access network equipment, the increasing UE service requirements can be met, and better service quality can be provided.

As shown in fig. 9, an embodiment of the present invention provides a UE 900. The UE 900 may include an acquisition module 901 and a transmission module 902. The obtaining module 901 is configured to obtain a first identifier, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; alternatively, if the first identifier is used for scheduling the first transport channel, N is an integer greater than 16. A sending module 902, configured to send first data on the logical channel indicated by the first identifier or the first transport channel scheduled by the first identifier, which is obtained by the obtaining module 901.

Optionally, in this embodiment of the present invention, the obtaining module 901 is specifically configured to receive the first identifier sent by the access network device.

Optionally, in the embodiment of the present invention, the N bits may be 6+ M bits, and the first bit may be M bits of the 6+ M bits, where M is a positive integer.

Optionally, in an embodiment of the present invention, the N bits may be 6+8 × K bits, and the first bit may be a bit corresponding to K bytes of the 6+8 × K bits, where K is a positive integer.

Optionally, in this embodiment of the present invention, in a case that the first identifier is used to schedule the first transmission channel, the obtaining module 901 may be further configured to receive a second identifier sent by the access network device, where the second identifier is used to schedule a second transmission channel, and the second identifier and the first identifier belong to the same domain; the sending module 902 may further be configured to send second data on the second transmission channel scheduled by the second identifier obtained by the obtaining module 901.

It is understood that, in the embodiment of the present invention, the UE 900 may be the UE 01 in the communication system shown in fig. 1 in the foregoing embodiment.

The UE provided in the embodiment of the present invention can implement each process implemented by the UE in the foregoing method embodiments, and is not described here again to avoid repetition.

On one hand, compared with the prior art that the domain in which the logical channel identifier is located includes 6 bits, because the number of bits included in the domain in which the first identifier provided in the embodiment of the present invention is greater than 6, the embodiment of the present invention expands the number of bits used for indicating the domain in which the identifier of the logical channel is located, so that more radio bearers can be established between the UE and the access network device. On the other hand, compared with the prior art that the domain where the cell radio network temporary identifier is located includes 16 bits, because the number of bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 16, the embodiment of the present invention expands the number of bits of the domain where the identifier for scheduling the transmission channel is located, so that the access network device can schedule more transmission channels for the UE, and thus more radio bearers can be established between the UE and the access network device. That is, in the embodiment of the present invention, since the UE may establish more radio bearers with the access network device, the increasing service requirements of the UE may be met, and better quality of service may be provided.

As shown in fig. 10, an embodiment of the present invention provides an access network device 1000. The access network device 1000 may include a transmitting module 1001 and a receiving module 1002. The sending module 1001 is configured to send a first identifier to the UE, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; alternatively, if the first identifier is used for scheduling the first transport channel, N is an integer greater than 16. A receiving module 1002, configured to receive first data sent by the UE on the logical channel indicated by the first identifier sent by the sending module 1001 or the first transport channel scheduled by the first identifier.

Optionally, in this embodiment of the present invention, the first identifier may be used to indicate a logical channel, the N bits may include a first bit, and the first bit may be a reserved bit or an extended bit in the MAC subheader.

Optionally, in an embodiment of the present invention, the first identifier may be used to schedule a first transmission channel, the N bits may be 8 × T bits, and T is an integer greater than 2.

Optionally, in this embodiment of the present invention, when the first identifier is used to schedule the first transmission channel, the sending module 1001 may be specifically configured to send the first identifier to the UE when the number of target radio bearers is greater than or equal to a first threshold, where the target radio bearers include a radio bearer established between the UE and the access network device and a radio bearer to be established between the UE and the access network device.

Optionally, in this embodiment of the present invention, when the first identifier is used to schedule the first transmission channel, the sending module 1001 may be further configured to send a second identifier to the UE, where the second identifier is used to schedule a second transmission channel, and the second identifier and the first identifier belong to the same domain; the receiving module 1002 may be further configured to receive second data sent by the UE on the second transmission channel scheduled by the second identifier sent by the sending module 1001.

It is understood that, in the embodiment of the present invention, the access network device 1000 may be the access network device 02 in the communication system shown in fig. 1 in the foregoing embodiment.

The access network device provided in the embodiment of the present invention can implement each process implemented by the access network device entity in the foregoing method embodiments, and for avoiding repetition, details are not described here again.

On one hand, compared with the prior art that the domain in which the logical channel identifier is located includes 6 bits, because the number of bits included in the domain in which the first identifier provided in the embodiment of the present invention is greater than 6, the embodiment of the present invention expands the number of bits used for indicating the domain in which the identifier of the logical channel is located, so that the access network device can establish more radio bearers with the UE. On the other hand, compared with the prior art that the domain where the cell radio network temporary identifier is located includes 16 bits, because the number of bits included in the domain where the first identifier is located provided by the embodiment of the present invention is greater than 16, the embodiment of the present invention expands the number of bits of the domain where the identifier for scheduling the transmission channel is located, so that the access network device can schedule more transmission channels for the UE, and thus the access network device can establish more radio bearers with the UE. That is, in the embodiment of the present invention, since the access network device may establish more radio bearers with the UE, the increasing service requirements of the UE may be met, and better quality of service may be provided.

Fig. 11 is a schematic diagram of a hardware structure of a UE implementing various embodiments of the present invention. As shown in fig. 11, the UE100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the UE structure shown in fig. 11 does not constitute a limitation of the UE, which may include more or fewer components than those shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the UE includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a wearable device, a pedometer, and the like.

The radio frequency unit 101 may be configured to obtain a first identifier; and transmitting data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier. The first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating a logical channel, N is an integer greater than 6; alternatively, if the first identifier is used for scheduling the first transport channel, N is an integer greater than 16.

It is understood that, in the embodiment of the present invention, the UE100 may be the UE 01 in the communication system shown in fig. 1 in the foregoing embodiment.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 101 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.

The UE100 provides the user with wireless broadband internet access via the network module 102, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the UE100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive an audio or video signal. The input unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.

The UE100 also includes at least one sensor 105, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or backlight when the UE100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the UE 100. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and receives and executes commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 11, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the UE, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the UE, and is not limited herein.

The interface unit 108 is an interface for connecting an external device to the UE 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the UE100 or may be used to transmit data between the UE100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the UE, connects various parts of the entire UE using various interfaces and lines, performs various functions of the UE and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the UE. Processor 110 may include one or more processing units; alternatively, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The UE100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and optionally, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system. In addition, the UE100 includes some functional modules that are not shown, and are not described in detail herein.

Optionally, an embodiment of the present invention further provides a UE, which includes the processor 110 shown in fig. 11, the memory 109, and a computer program stored in the memory 109 and capable of being executed on the processor 110, where the computer program, when executed by the processor 110, implements the processes of the foregoing method embodiment, and can achieve the same technical effect, and details are not described here to avoid repetition.

Fig. 12 is a schematic diagram of a hardware structure of an access network device according to an embodiment of the present invention. As shown in fig. 12, the access network apparatus 1200 may include: one or more processors 1201, memory 1202, communication interface 1203, and bus 1204.

The one or more processors 1201, the memory 1202, and the communication interface 1203 are connected to each other by a bus 1204. The bus 1204 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 1204 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus. In addition, the access network device 1200 may further include some functional modules that are not shown, and are not described herein again.

It is to be understood that, in the embodiment of the present invention, the access network device 1200 may be the access network device 02 in the communication system shown in fig. 1 in the foregoing embodiment.

Optionally, an embodiment of the present invention further provides an access network device, which includes the processor 1201 shown in fig. 12, a memory 1202, and a computer program stored in the memory 1202 and capable of running on the processor 1201, where the computer program is executed by the processor 1201 to implement the processes of the foregoing method embodiment, and can achieve the same technical effect, and details are not described here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 110 shown in fig. 11 or the processor 1201 shown in fig. 12, the computer program implements the processes of the method embodiment, and can achieve the same technical effects, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method described in the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A data transmission method is applied to User Equipment (UE), and comprises the following steps:

acquiring a first identifier, wherein the first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating the logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling the first transmission channel, N is an integer greater than 16;

and sending first data on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier.

2. The method of claim 1, wherein obtaining the first identifier comprises:

and receiving the first identifier sent by the access network equipment.

3. The method of claim 1 or 2, wherein the first flag is used for indicating the logical channel, and wherein the N bits comprise a first bit, and wherein the first bit is a reserved bit or an extended bit in a Media Access Control (MAC) subheader.

4. The method of claim 3, wherein the N bits are 6+ M bits, wherein the first bit is M bits of the 6+ M bits, and wherein M is a positive integer.

5. The method of claim 3, wherein the N bits are 6+ 8K bits, wherein the first bit is a bit corresponding to K bytes of the 6+ 8K bits, and wherein K is a positive integer.

6. The method according to claim 1 or 2, wherein the first identifier is used for scheduling the first transport channel, wherein the N bits are 8 x T bits, and wherein T is an integer greater than 2.

7. The method according to claim 1 or 2, wherein the first identity is used for scheduling the first transport channel, the method further comprising:

receiving a second identifier sent by access network equipment, wherein the second identifier is used for scheduling a second transmission channel, and the second identifier and the first identifier belong to the same domain;

and transmitting second data on the second transmission channel scheduled by the second identification.

8. A data transmission method, applied to an access network device, the method comprising:

sending a first identifier to User Equipment (UE), wherein the first identifier is used for indicating a logic channel or scheduling a first transmission channel, and a domain where the first identifier is located comprises N bits; if the first identifier is used for indicating the logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling the first transmission channel, N is an integer greater than 16;

and receiving first data sent by the UE on the logical channel indicated by the first identifier or the first transmission channel scheduled by the first identifier.

9. The method of claim 8, wherein the first flag is used for indicating the logical channel, and wherein the N bits comprise a first bit, and wherein the first bit is a reserved bit or an extended bit in a Media Access Control (MAC) subheader.

10. The method of claim 9, wherein the N bits are 6+ M bits, wherein the first bit is M bits of the 6+ M bits, and wherein M is a positive integer.

11. The method of claim 9, wherein the N bits are 6+8 x K bits, wherein the first bit is a bit corresponding to K bytes of the 6+8 x K bits, and wherein K is a positive integer.

12. The method of claim 8, wherein the first flag is used for scheduling the first transport channel, and wherein the N bits are 8 x T bits, and wherein T is an integer greater than 2.

13. The method of claim 8, wherein the first identifier is used for scheduling the first transport channel;

the sending the first identifier to the UE includes:

and sending the first identifier to the UE under the condition that the number of target radio bearers is greater than or equal to a first threshold, wherein the target radio bearers comprise radio bearers established between the UE and the access network equipment and radio bearers to be established between the UE and the access network equipment.

14. The method of claim 8, 12 or 13, wherein the first identifier is used for scheduling the first transmission channel, the method further comprising:

sending a second identifier to the UE, wherein the second identifier is used for scheduling a second transmission channel, and the second identifier and the first identifier belong to the same domain;

and receiving second data sent by the UE on the second transmission channel scheduled by the second identifier.

15. The UE is characterized by comprising an acquisition module and a sending module;

the acquiring module is configured to acquire a first identifier, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating the logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling the first transmission channel, N is an integer greater than 16;

the sending module is configured to send first data on the logical channel indicated by the first identifier obtained by the obtaining module or the first transmission channel scheduled by the first identifier.

16. The UE of claim 15,

the obtaining module is specifically configured to receive the first identifier sent by the access network device.

17. The UE of claim 15 or 16, wherein the first flag is used to indicate the logical channel, and wherein the N bits comprise a first bit, and wherein the first bit is a reserved bit or an extended bit in a MAC subheader.

18. The UE of claim 17, wherein the N bits are 6+ M bits, wherein the first bit is M of the 6+ M bits, and wherein M is a positive integer.

19. The UE of claim 17, wherein the N bits are 6+8 x K bits, wherein the first bit is a bit corresponding to K bytes of the 6+8 x K bits, and wherein K is a positive integer.

20. The UE of claim 15 or 16, wherein the first identifier is used for scheduling the first transport channel, wherein the N bits are 8 x T bits, and wherein T is an integer greater than 2.

21. The UE of claim 15 or 16, wherein the first identity is used for scheduling the first transport channel;

the obtaining module is further configured to receive a second identifier sent by an access network device, where the second identifier is used to schedule a second transmission channel, and the second identifier and the first identifier belong to the same domain;

the sending module is further configured to send second data on the second transmission channel scheduled by the second identifier acquired by the acquiring module.

22. An access network device, characterized in that the access network device comprises a sending module and a receiving module;

the sending module is configured to send a first identifier to user equipment UE, where the first identifier is used to indicate a logical channel or schedule a first transmission channel, and a domain where the first identifier is located includes N bits; if the first identifier is used for indicating the logical channel, N is an integer greater than 6; or, if the first identifier is used for scheduling the first transmission channel, N is an integer greater than 16;

the receiving module is configured to receive first data sent by the UE on the logical channel indicated by the first identifier sent by the sending module or the first transport channel scheduled by the first identifier.

23. The access network device of claim 22, wherein the first flag is used to indicate the logical channel, and wherein the N bits comprise a first bit, and wherein the first bit is a reserved bit or an extended bit in a Medium Access Control (MAC) subheader.

24. The access network device of claim 23, wherein the N bits are 6+ M bits, wherein the first bit is M bits of the 6+ M bits, and wherein M is a positive integer.

25. The access network device of claim 23, wherein the N bits are 6+8 x K bits, wherein the first bit is a bit corresponding to K bytes of the 6+8 x K bits, and wherein K is a positive integer.

26. The access network device of claim 22, wherein the first flag is used to schedule the first transport channel, wherein the N bits are 8 x T bits, and wherein T is an integer greater than 2.

27. The access network device of claim 22, wherein the first identifier is used to schedule the first transport channel;

the sending module is specifically configured to send the first identifier to the UE when the number of target radio bearers is greater than or equal to a first threshold, where the target radio bearers include radio bearers established between the UE and the access network device and radio bearers to be established between the UE and the access network device.

28. An access network device according to claim 22, 26 or 27, characterised in that the first identity is used for scheduling the first transport channel;

the sending module is further configured to send a second identifier to the UE, where the second identifier is used to schedule a second transmission channel, and the second identifier and the first identifier belong to the same domain;

the receiving module is further configured to receive second data sent by the UE on the second transmission channel scheduled by the second identifier sent by the sending module.

29. A user equipment, UE, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the data transmission method according to any of claims 1 to 7.

30. An access network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the data transmission method according to any one of claims 8 to 14.

31. A communication system, characterized in that the communication system comprises a user equipment, UE, according to any of claims 15 to 21, and an access network device according to any of claims 22 to 28; or,

the communication system comprises the UE of claim 29, and the access network device of claim 30.