CN109729553B

CN109729553B - Voice service processing method and device of LTE (Long term evolution) trunking communication system

Info

Publication number: CN109729553B
Application number: CN201711035083.8A
Authority: CN
Inventors: 魏立梅; 袁乃华; 范晨; 周志宏; 朱玉梅
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2017-10-30
Filing date: 2017-10-30
Publication date: 2021-12-28
Anticipated expiration: 2037-10-30
Also published as: CN109729553A

Abstract

The embodiment of the invention provides a voice service processing method and equipment of an LTE cluster communication system, wherein the method comprises the following steps: receiving configuration information of an EPS bearer of an evolved packet system, wherein the configuration information comprises narrowband speech coding (NVOC) information, and the NVOC information represents that the EPS bearer adopts an NVOC coding mode to carry out information source coding; and establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode. The embodiment of the invention can carry out source coding on the voice service data in the LTE cluster communication system through narrowband voice coding, provides corresponding processing schemes of L2 and L1, and has the advantage of lower code rate of output source coding.

Description

Voice service processing method and device of LTE (Long term evolution) trunking communication system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a voice service processing method and device of an LTE (Long term evolution) trunking communication system.

Background

With the increasing demand for uplink and downlink wireless communication broadband in emergency command and dispatch, large-scale public activity command and dispatch and mobile duty enforcement, Long Term Evolution (Long Term Evolution, LTE for short) trunking communication systems have come into force.

An existing LTE trunking communication system generally uses an Adaptive multi-rate (AMR) speech encoder to perform source coding on a speech service of the system, and the output code rate of the source coding method is high.

Disclosure of Invention

The embodiment of the invention provides a voice service processing method and equipment of an LTE (Long term evolution) trunking communication system, which are used for encoding by using narrowband voice coding in the LTE trunking communication system and reducing the output code rate of source coding.

A first aspect of the embodiments of the present invention provides a method for processing a voice service in an LTE trunking communication system, where the method includes:

receiving configuration information of an EPS bearer of an evolved packet system, wherein the configuration information comprises narrowband speech coding (NVOC) information, and the NVOC information represents that the EPS bearer adopts an NVOC coding mode to carry out information source coding;

and establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode.

Optionally, the performing, by using the data link layer L2 processing method corresponding to the NVOC coding method, L2 processing on the high-level data on the EPS bearer includes:

when the EPS bearer has no corresponding packet data convergence protocol PDCP entity and radio link control RLC entity, directly mapping the data on the EPS bearer to a corresponding dedicated traffic channel DTCH, and sending the data on the EPS bearer to an MAC layer through the DTCH,

or, when the EPS bearer has no corresponding PDCP entity and adopts a transparent mode TM RLC entity, mapping data on the EPS bearer to a corresponding DTCH after transparent transmission processing of the TM RLC entity, and sending the transparent data to an MAC layer through the DTCH;

and the MAC layer sequentially assembles the received data into MAC PDUs (protocol data units), and transmits the MAC PDUs to the physical layer through corresponding transmission channels, wherein the MAC PDUs do not carry MAC headers.

when the EPS bearer comprises a PDCP entity and does not comprise an RLC entity, the data on the EPS bearer is mapped to a corresponding DTCH after being processed by the PDCP entity, and the data on the EPS bearer is sent to an MAC layer through the DTCH,

or, when the EPS bearer includes a PDCP entity and a TM RLC entity is adopted, mapping data on the EPS bearer to a corresponding DTCH after the PDCP entity processing and the transparent transmission processing of the TM RLC entity, and sending the data after the PDCP entity processing and the TM RLC entity processing to an MAC layer through the DTCH;

Optionally, the performing, by using the L1 processing method corresponding to the NVOC coding method, L1 layer processing on the high-layer data on the EPS bearer includes:

and carrying out channel coding on the data on the corresponding transmission channel by adopting a tail biting convolutional coding mode or a TURBO coding mode, and carrying out channel decoding on the data on the corresponding transmission channel by adopting a corresponding channel decoding mode, wherein the code rate of the TURBO coding mode is any code rate except 1/3 code rate.

Optionally, the downlink direction of the EPS bearer is mapped to a downlink shared channel DL-SCH, and the DL-SCH is mapped to a physical downlink shared channel PDSCH;

and the uplink direction of the EPS bearer is mapped to an uplink shared channel (UL-SCH), and the UL-SCH is mapped to a Physical Uplink Shared Channel (PUSCH).

A second aspect of an embodiment of the present invention provides a terminal device, including:

the receiving module is used for receiving configuration information of an EPS bearer of an evolved packet system, wherein the configuration information comprises narrowband speech coding (NVOC) information, and the NVOC information represents that the EPS bearer adopts an NVOC coding mode for source coding;

and the processing module is used for establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on the high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode.

Optionally, the processing module includes:

a first mapping sub-module, configured to map data on the EPS bearer directly onto a corresponding dedicated traffic channel DTCH when the EPS bearer does not have a corresponding packet data convergence protocol PDCP entity and a radio link control RLC entity, and send the data on the EPS bearer to a MAC layer through the DTCH,

and the first MAC layer processing submodule is used for assembling the received data into MAC PDU in sequence and sending the MAC PDU to a physical layer through a corresponding transmission channel, wherein the MAC PDU does not carry an MAC header.

Optionally, the processing module includes:

a second mapping sub-module, configured to map, when the EPS bearer includes a PDCP entity but does not include an RLC entity, data on the EPS bearer to a corresponding DTCH after being processed by the PDCP entity, and send the data on the EPS bearer to a MAC layer through the DTCH,

and the second MAC layer processing submodule is used for assembling the received data into MAC PDU in sequence and sending the MAC PDU to a physical layer through a corresponding transmission channel, wherein the MAC PDU does not carry an MAC header.

Optionally, the processing module includes:

and the first processing sub-module is used for carrying out channel coding on the data on the corresponding transmission channel by adopting a tail-biting convolutional coding mode or a TURBO coding mode and carrying out channel decoding on the data on the corresponding transmission channel by adopting a corresponding channel decoding mode, wherein the code rate of the TURBO coding mode is any code rate except 1/3 code rate.

In the embodiment of the invention, configuration information of an EPS bearer is received, wherein the configuration information comprises narrowband speech coding NVOC information, and the NVOC information represents that the EPS bearer adopts an NVOC coding mode to carry out information source coding; and establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode. Therefore, the purpose of carrying out source coding by using a narrowband speech coding mode in an LET cluster communication system is realized, corresponding processing schemes of L2 and L1 are provided, and the method has the advantage of low source coding output code rate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a voice service processing method of an LTE trunking communication system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a terminal 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention, are intended to cover non-exclusive inclusions, e.g., a process or an apparatus that comprises a list of steps is not necessarily limited to those structures or steps expressly listed but may include other steps or structures not expressly listed or inherent to such process or apparatus.

In the prior art, a police digital trunking system (PDT) is a trunking communication system that uses a proprietary narrowband speech coding method for source coding. The output code rate of source coding in this system is 2.4kbps or 2.15kbps, and 48 or 43 bits of information are output for each 20ms speech frame accordingly. Channel coding employs forward error correction coding (FEC), and each speech frame outputs 72 bits of information after channel coding. PDT adopts a 4FSK modulation mode for voice service, and each 2 bits in the modulation correspond to a 4FSK symbol. Because the narrow-band speech coding mode adopted in the PDT system has the advantage of low output code rate of source coding compared with the AMR speech coding mode commonly used in the LTE trunking communication system, the embodiment of the invention applies the narrow-band speech coding mode adopted in the PDT system to the LTE trunking communication system to reduce the output code rate of the source coding, and the following explains how to apply the narrow-band speech coding mode to the LTE trunking communication system for source coding and how to perform L2 processing, channel coding and modulation on speech service data output after narrow-band speech coding by combining with the specific embodiment:

referring to fig. 1, fig. 1 is a flowchart of a voice service processing method of an LTE trunking communication system according to an embodiment of the present invention, where the method may be executed by a terminal device or a base station. As shown in fig. 1, the method comprises the steps of:

step 101, receiving configuration information of an evolved packet system EPS bearer, where the configuration information includes narrowband speech coding NVOC information, and the NVOC information indicates that the EPS bearer adopts an NVOC coding mode to perform source coding.

Step 102, establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on the high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode.

As shown in table 1 and table 2, in the LTE system, the channel coding scheme is bound to a transmission channel type or an information type. The NVOC coding mode is only an information source coding mode of the voice service, the logical channel corresponding to the EPS bearer bearing the NVOC voice service should be a Dedicated Traffic Channel (DTCH), and according to the direction of the bearer: and the corresponding transmission channel is an uplink shared channel (UL-SCH) or a downlink shared channel (DL-SCH).

The UL-SCH and the DL-SCH are mapped to a physical channel PUSCH and a PDSCH, respectively. The modulation schemes supported by the PUSCH and PDSCH are shown in tables 3 and 4, respectively. The modulation scheme used each time the PUSCH and PDSCH are transmitted is specified by the scheduling information as one of the modulation schemes supported by the PUSCH and PDSCH.

TABLE 1

TABLE 2

TABLE 3

Physical channel	Modulation system
		PUSCH	QPSK,16QAM,64QAM,256QAM

TABLE 4

Physical channel	Modulation system
		PDSCH	QPSK,16QAM,64QAM,256QAM

In this embodiment, when a terminal device initiates a trunking voice service, a voice service request is actively sent to an EPC in an LTE trunking communication system, and information that supports narrowband voice coding is added to the voice service request. After receiving a voice service request, if the EPC analyzes that the terminal equipment has a narrowband voice coding function, establishing an EPS bearer which uses a narrowband voice coding mode to carry out source coding, and sending configuration information of the EPS bearer to a base station, the base station determines the configurations of the EPS bearer at L2 and L1 of a Uu interface, carries the configuration information of L2 and L1 in the configuration information of the EPS bearer and sends the configuration information to the terminal equipment, wherein if the base station detects that the configuration information carries NVOC information, after establishing a corresponding EPS bearer, the EPC carries out L2 and L1 processing on high-level data on the EPS bearer according to a pre-agreed processing method of a data link layer (L2) and a physical layer (L1) corresponding to the NVOC coding mode. Wherein, the EPS bearing is mapped to an uplink shared channel (UL-SCH) in the uplink direction, the UL-SCH is mapped to a Physical Uplink Shared Channel (PUSCH), the EPS bearing is mapped to a downlink shared channel (DL-SCH) in the downlink direction, and the DL-SCH is mapped to a physical uplink shared channel (PDSCH).

Optionally, the processing method of L2 in this embodiment may be any one of the following:

in a possible mode, the data processing mode of L2 is the same as that of L2 defined by the existing 3GPP protocol.

Included in the existing L2 are a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Medium Access Control (MAC) layer. The data processing of L2 is as follows:

the EPS bearer for the voice service has a PDCP entity and an RLC entity corresponding to the PDCP layer and the RLC layer of L2, respectively. The voice service data on the EPS bearer is processed by the PDCP entity and the RLC entity, and then sent to the MAC layer through a corresponding Dedicated Traffic Channel (DTCH). Here, according to the 3GPP protocol, the RLC entity used by the EPS bearer is an UM RLC entity or an AM RLC entity.

The MAC layer supports multiplexing of the respective logical channels of the terminal device in the same subframe. The MAC layer assembles MAC Protocol Data Units (PDUs) according to the scheduling information. The MAC PDU may be assembled from MAC Service Data Units (SDUs) on multiple logical channels of the terminal device.

The MAC layer sends the MAC PDU to the physical layer through the corresponding transport channel of the bearer. In the uplink direction, MAC PDU on EPS bearing is sent to a physical layer through UL-SCH; in the downlink direction, the MAC PDUs on the EPS bearer are sent to the physical layer via the DL-SCH. The UL-SCH/DL-SCH is channel-coded in Transport Block (TB) units. Here, the MAC PDU carries a MAC header, an RLC header, and a PDCP header, and the non-speech frame payload has more bits.

For example, in this data processing method, a voice service that performs source coding by using a narrowband voice coding method outputs a source-coded payload in units of 20ms voice frames, where each voice frame includes 48 bits when not encrypted, and includes a payload of 43 bits and an encrypted vector of 5 bits when encrypted.

Here, the voice frame carried by the EPS may be an unencrypted voice frame or an encrypted voice frame. The encryption algorithm adopted by the encrypted voice frame is a voice encryption algorithm supported by the PDT system. The present embodiment preferably employs unencrypted speech frames.

The length of the speech frames without encryption is 48 bits or 43 bits. A Guaranteed Bit Rate (GBR) in the EPS bearer configuration information may identify the length of the speech frame when establishing the EPS bearer. A GBR of 2.4kbps or 2.15kbps indicates a corresponding speech frame length of 48 bits or 43 bits, respectively. When the GBR is at a rate of 2.15kbps and encrypted, the voice frame length is 48 bits. It is understood that this is by way of illustration and not by way of limitation.

In yet another possible approach, the EPS bearer has no corresponding PDCP entity, no corresponding RLC entity, or a Transparent Mode (TM) RLC entity. The voice service data on the EPS bearer is directly mapped to a corresponding DTCH, or mapped to a corresponding DTCH after the transparent transmission processing of a TM RLC entity. And then sent to the MAC layer through a corresponding DTCH.

In this way, the MAC layer does not support multiplexing of the DTCH corresponding to the EPS bearer and other logical channels of the terminal device in the same subframe. And the MAC layer assembles the MAC SDUs on the DTCH corresponding to the EPS bearer into MAC PDUs in sequence according to the scheduling information, and sends the MAC PDUs to the physical layer as the TBs on the corresponding transmission channels. The MAC PDU is formed by cascading 1 or more MAC SDUs, and if the synthesized MAC PDU does not meet byte alignment, a patch bit is added at the tail.

In this way, the MAC PDU has no PDCP header, RLC header and MAC header, and the voice service data on the EPS bearer may be a ciphered or non-ciphered voice frame. This embodiment preferably employs encrypted speech frames.

In yet another possible approach, the EPS carries a corresponding PDCP entity without a corresponding RLC entity or with a TM (transparent mode) RLC entity. The voice service data on the EPS bearer is directly mapped to a corresponding DTCH through the processing of the PDCP entity, or mapped to the corresponding DTCH after the processing of the PDCP entity and the transparent transmission processing of the TM RLC entity. And then sent to the MAC layer through a corresponding DTCH.

In this way, the MAC layer is processed as in the previous possible way, and the voice service data on the EPS bearer may be encrypted or unencrypted voice frames. The present embodiment preferably uses voice frames without encryption. The MAC PDU has no MAC header and no RLC header, and has fewer redundant bits.

In this embodiment, the processing method of L1 includes a coding processing procedure for UL-SCH/DL-SCH and a modulation processing for corresponding PUSCH/PDSCH, where the modulation procedure of PUSCH/PDSCH in this embodiment is the same as that of the prior art, and taking the modulation procedure as an example, the main steps include bit scrambling, symbol modulation, layer mapping, layer-to-antenna port mapping, RE mapping, and baseband signal generation. The modulation scheme used in the symbol modulation is any one of a plurality of modulation schemes supported by the PDSCH. The modulation modes supported by the PDSCH include: QPSK, 16QAM, 64QAM, and 256 QAM.

Specifically, in this embodiment, the channel coding scheme of the UL-SCH/DL-SCH may be any one of the following:

in one possible approach, the channel coding of the UL-SCH/DL-SCH is the same as the existing coding. In the prior art, a channel coding mode of UL-SCH/DL-SCH includes a plurality of steps, and the main steps include: cyclic check (CRC) code addition for transport blocks, code block segmentation and code block CRC code addition, channel coding, rate matching, and concatenation of code blocks. Wherein, the channel coding adopts 1/3TURBO coding. Wherein, the coding mode in the channel coding is 1/3TURBO coding, and 3 bit streams are output; the 3 bit streams are separately sub-block interleaved in rate matching, and then bit collection, bit selection, and puncturing are performed on the 3 bit streams. Since the channel coding method in this scenario is the same as that in the prior art, no further description is given here.

In another possible mode, a tail-biting convolutional coding mode is adopted on the UL-SCH and the DL-SCH, and the coding rate is 1/3 code rate or other code rates, or a TURBO coding mode is adopted, and the code rate of the TURBO coding mode is any code rate except 1/3 code rate. And mapping the bit streams after channel coding on the UL-SCH and the DL-SCH to a PUSCH and a PDSCH respectively, wherein the modulation modes of the PUSCH and the PDSCH are the same as the modulation modes of the conventional PUSCH and PDSCH. When UL-SCH and DL-SCH adopt non-1/3 code rate tail-biting convolutional coding or TURBO coding, outputting N bit streams in channel coding; the N bit streams are separately sub-block interleaved in rate matching, and then bit collection, bit selection, and puncturing are performed on the N bit streams. Here, N depends on the code rate, such as: for channel coding with code rate 1/2, N is 2, and for channel coding with code rate 1/4, N is 4.

In the existing LTE system, the UL-SCH/UL-SCH adopts 1/3 code rate TURBO coding. In the PDSCH correlation process or PUSCH correlation process in the 3GPP TS36.213 protocol, the index I is determined according to MCS_MCSDetermining modulation mode and I of transport block on UL-SCH/DL-SCH_TBS. The length of the transport block on UL-SCH/DL-SCH is determined by I_TBSNumber of radio bearers RB and number of layers. Different numbers of layers correspond to different transport block length tables. The input to each transport block length table is: i is_TBSAnd RB number, the output is: the length of the transport block. The corresponding table in section 7 of the TS36.213 protocol can be looked up by I according to the number of layers_TBSAnd the number of RBs determines the transport block length. Table 5 is a part of the content intercepted from Table 7.1.7.2.1-1 in 3GPP TS36.213 protocol, and the corresponding layer number of the Table is 1. From table 5 it can be seen that: according to I_TBSAnd the number of RBs, a transport block length can be obtained. Because these transport block length tables are obtained according to the 1/3-rate TURBO coding, when convolutional coding or non-1/3-rate TURBO coding is adopted for NVOC voice services, the tables can be reused, and the corresponding tables under tail-biting convolutional coding or non-1/3-rate TURBO coding can also be determined according to simulation data of convolutional coding or non-1/3-rate TURBO coding: different numbers of layers correspond to different tables, each table having I_TBSAnd the RB number is used as input, and the length of the transmission block is obtained through table lookup.

When the UE is located at the edge of a cell and the MAC layer needs to perform segmented transmission on MAC SDUs corresponding to a 20ms voice frame on a DTCH, the length of a transport block is the length of each segment. And when the length of the segment does not meet the byte alignment, padding bits are added at the end of the segment to achieve byte alignment.

TABLE 5

In this embodiment, configuration information of an EPS bearer is received, where the configuration information includes narrowband speech coding NVOC information, and the NVOC information indicates that the EPS bearer adopts an NVOC coding mode to perform source coding; and establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode, so that the aim of performing source coding by using a narrowband speech coding mode in an LET cluster communication system is fulfilled, and meanwhile, corresponding L2 and L1 processing schemes are provided, so that the method has the advantage of low source coding output code rate.

Fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention, and as shown in fig. 2, the terminal device includes:

a receiving module 11, configured to receive configuration information of an EPS bearer of an evolved packet system, where the configuration information includes narrowband speech coding NVOC information, and the NVOC information indicates that the EPS bearer adopts an NVOC coding mode to perform source coding;

and a processing module 12, configured to establish an EPS bearer according to the configuration information, and perform L2 and L1 processing on high-level data on the EPS bearer by using a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding scheme.

Optionally, the processing module includes:

a first mapping submodule for: when the EPS bearer has no corresponding packet data convergence protocol PDCP entity and radio link control RLC entity, directly mapping the data on the EPS bearer to a corresponding dedicated traffic channel DTCH, and sending the data on the EPS bearer to an MAC layer through the DTCH,

Optionally, the processing module includes:

or, when the EPS bearer includes a PDCP entity and a TM RLC entity is adopted, mapping data on the EPS bearer to a corresponding DTCH after the PDCP entity processing and the transparent transmission processing of the TM RLC entity, and sending the data processed by the PDCP entity and the TM RLC entity to an MAC layer through the DTCH;

and the second MAC layer processing submodule is used for assembling the received data into MAC PDUs in sequence and sending the MAC PDUs to the physical layer through corresponding transmission channels, wherein the MAC PDUs do not carry MAC headers.

Optionally, the processing module includes:

and the first processing submodule is used for carrying out channel coding on the data on the corresponding transmission channel by adopting a tail-biting convolutional coding mode or a TURBO coding mode, wherein the code rate of the TURBO coding mode is any code rate except 1/3 code rate.

Alternatively to this, the first and second parts may,

the downlink direction of the EPS bearer is mapped to a downlink shared channel (DL-SCH), and the DL-SCH is mapped to a Physical Downlink Shared Channel (PDSCH);

The terminal device provided in this embodiment can execute the technical solution in the embodiment of fig. 1, and the execution manner and the beneficial effects are similar, which are not described herein again.

Finally, it should be noted that, as one of ordinary skill in the art will appreciate, all or part of the processes of the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, where the computer program may be stored in a computer-readable storage medium, and when executed, the computer program may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like.

Each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium. The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A voice service processing method of an LTE cluster communication system is characterized by comprising the following steps:

establishing an EPS bearer according to the configuration information, and performing L2 and L1 processing on high-level data on the EPS bearer by adopting a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding mode;

the performing, by using the data link layer L2 processing method corresponding to the NVOC coding method, L2 processing on the high-level data on the EPS bearer includes:

the MAC layer assembles the received data into MAC PDU in sequence and sends the MAC PDU to a physical layer through a corresponding transmission channel, wherein the MAC PDU does not carry an MAC header;

alternatively, the first and second electrodes may be,

2. The method of claim 1, wherein the performing, by using the L1 processing method corresponding to the NVOC coding scheme, L1-layer processing on the high-layer data on the EPS bearer comprises:

and carrying out channel coding on data on a corresponding transmission channel by adopting a tail-biting convolutional coding mode or a TURBO coding mode, wherein the code rate of the TURBO coding mode is any code rate except 1/3 code rate.

3. The method of claim 2, wherein the downlink direction of the EPS bearer is mapped to a downlink shared channel DL-SCH, and wherein the DL-SCH is mapped to a physical downlink shared channel PDSCH;

4. A terminal device, comprising:

a processing module, configured to establish an EPS bearer according to the configuration information, and perform L2 and L1 processing on high-level data on the EPS bearer by using a data link layer L2 and a physical layer L1 processing method corresponding to the NVOC coding scheme;

the processing module comprises:

the first MAC layer processing submodule is used for assembling the received data into MAC PDU in sequence and sending the MAC PDU to a physical layer through a corresponding transmission channel, wherein the MAC PDU does not carry an MAC header;

5. The terminal device of claim 4, wherein the processing module comprises:

6. The terminal device of claim 5,