CN112565166A

CN112565166A - Data transmission method of LTE230 system, electronic equipment and storage medium

Info

Publication number: CN112565166A
Application number: CN201910919751.6A
Authority: CN
Inventors: 周欣; 吕征南; 姜春霞
Original assignee: Potevio Information Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26

Abstract

The embodiment of the invention provides a data transmission method, electronic equipment and a storage medium of an LTE230 system, wherein the method comprises the following steps: generating MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU; and transmitting the MAC PDU. The method, the electronic device and the storage medium provided by the embodiment of the invention multiplex MAC data PDUs corresponding to a plurality of logical channels on one MAC PDU for transmission, so as to realize the support of simultaneously transmitting signaling and one or more concurrent service data, effectively reduce transmission delay, reduce control channel overhead and improve the parallel transmission efficiency of data.

Description

Data transmission method of LTE230 system, electronic equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, an electronic device, and a storage medium for an LTE230 system.

Background

The LTE230 system is a wireless private network communication system operating in a 230MHz frequency band, and the LTE230 system performs Data transmission by using a MAC (Media Access Control ) PDU (Protocol Data Unit) transmission format.

Fig. 1 is a schematic structural diagram of a MAC PDU in the prior art, and as shown in fig. 1, in the existing LTE230 system, only the requirement of single service transmission is considered, and except for a transparent mode MAC PDU and a MAC PDU for a random access response, a MAC PDU structure for DL _ SCH (Downlink Shared Channel) and UL _ SCH (Uplink Shared Channel) includes the following parts: the MAC Padding PDU (MAC Padding PDU), zero or more MAC Control PDUs (MAC Control PDU), zero or one MAC Data PDU (MAC Data PDU), where the MAC Data PDU includes a Local Channel Identity (LCID) and a Service Data Unit (SDU). The structural design of the MAC PDU shown in fig. 1 determines that one MAC PDU can contain only one MAC data PDU at most, so that in the LTE230 system, traffic data on only one logical channel can be transmitted on one TB (Transport Block) at most.

When a user has multiple concurrent services or signaling and service data need to be transmitted simultaneously, the signaling and the MAC data PDU corresponding to different services cannot be multiplexed onto one MAC PDU, and only multiple MAC PDUs can be generated and transmitted through multiple TBs, resulting in an increase in transmission delay and an increase in control channel overhead.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, electronic equipment and a storage medium of an LTE230 system, which are used for solving the problems of transmission delay and high control channel overhead when the existing MAC PDU structure is used for data transmission.

In a first aspect, an embodiment of the present invention provides a data transmission method for an LTE230 system, including:

generating MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU;

and transmitting the MAC PDU.

Preferably, the preset PDU structure further includes a MAC padding PDU and/or a plurality of MAC control PDUs.

Preferably, the preset PDU structure includes at least one of a first preset PDU structure, a second preset PDU structure and a third preset PDU structure;

wherein the first preset PDU structure is set according to the order of the MAC filling PDU, the MAC control PDU and the MAC data PDU; the second preset PDU structure is set according to the sequence of the MAC control PDU, the MAC data PDU and the MAC filling PDU; the third preset PDU structure is set in the order of the MAC data PDU, the MAC control PDU, and the MAC padding PDU.

Preferably, the generating of the MAC PDU of the preset PDU structure specifically includes:

when the current data is downlink, generating MAC PDU of a downlink PDU structure; the downlink PDU structure is any one of the first preset PDU structure, the second preset PDU structure and the third preset PDU structure;

when the current data is uplink, generating MAC PDU of an uplink PDU structure; the uplink PDU structure is any one of the first preset PDU structure, the second preset PDU structure and the third preset PDU structure.

Preferably, the downlink PDU structure is the second preset PDU structure, and the uplink PDU structure is the third preset PDU structure.

Preferably, the length field includes a format field and a length field, wherein the format field is used for indicating the length of the length field, and the length field is used for indicating the length of the SDU.

Preferably, the MAC data PDU further includes an LCID field for indicating a logical channel corresponding to the SDU, and the length of the LCID field is greater than or equal to 3 bits; the length of the format field is more than or equal to 1 bit;

the sum of the lengths of the LCID field, the format field and the length field is 8n +3 bits, and n is a positive integer.

In a second aspect, an embodiment of the present invention provides a data transmission method for an LTE230 system, including:

receiving the MAC PDU;

analyzing the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU.

In a third aspect, an embodiment of the present invention provides a transmitting end, including:

the generating unit is used for generating the MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU;

a transmitting unit, configured to transmit the MAC PDU.

In a fourth aspect, an embodiment of the present invention provides a receiving end, including:

a receiving unit, configured to receive a MAC PDU;

the analysis unit is used for analyzing the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU.

In a fifth aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a bus, where the processor and the communication interface, the memory complete communication with each other through the bus, and the processor may call logic instructions in the memory to perform the steps of the method as provided in the first aspect or the second aspect.

In a sixth aspect, embodiments of the present invention provide a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first or second aspect.

According to the data transmission method, the electronic device and the storage medium of the LTE230 system, MAC data PDUs corresponding to a plurality of logic channels are multiplexed on one MAC PDU for transmission, so that signaling and one or more concurrent service data can be transmitted simultaneously, transmission delay is effectively reduced, control channel overhead is reduced, and parallel transmission efficiency of data is improved.

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 some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a diagram illustrating a structure of a MAC PDU in the prior art;

fig. 2 is a schematic diagram of frequency resource distribution of an LTE230 system in the prior art;

fig. 3 is a flowchart illustrating a data transmission method of an LTE230 system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first preset PDU according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second preset PDU according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a third preset PDU according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a data transmission method of an LTE230 system according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a transmitting end according to an embodiment of the present invention;

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

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, but 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.

Fig. 2 is a schematic diagram of frequency resource distribution of an LTE230 system in the prior art, and as shown in fig. 2, a frequency spectrum of the LTE230 system is comb-shaped, and frequency resources can be divided into a plurality of sub-bands, where a sub-band at a lowest frequency point is 223.525MHz, and a sub-band at a highest frequency point is 231.65 MHz.

The LTE230 system supports a power consumption information collection service that collects and analyzes power consumption information of residential users, industrial and commercial users, and specialized users (such as large factories). With the rapid advance of smart grid construction, the LTE230 system also needs to support emerging smart grid service applications, such as providing services of power distribution automation and load management, emergency repair, overhaul, mobile asset visualization management, etc. that support production command for power distribution scheduling and power distribution networks, so as to achieve intelligent information acquisition and control in the links of power generation, power transformation, power transmission, power distribution and power consumption in the power system. It can be seen that the services supported by the LTE230 system are shifting from unity to diversity, and the terminals in the LTE230 system are also moving from supporting only single service transmission to supporting multi-service concurrency. How to improve the data transmission efficiency of the LTE230 system to meet the concurrent requirement of multiple services is still a problem to be solved by those skilled in the art.

The embodiment of the invention provides a data transmission method of an LTE230 system, which aims to improve the data transmission efficiency of the LTE230 system. Fig. 3 is a flowchart illustrating a data transmission method of an LTE230 system according to an embodiment of the present invention, where as shown in fig. 3, an execution subject of the method is a transmitting end in the LTE230 system, and the transmitting end may be a base station or a terminal, and the method includes:

step 310, generating an MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any MAC data PDU comprises an SDU and a length field for indicating the length of the SDU.

Specifically, a PDU structure, i.e., a preset structure of a MAC PDU, is preset, and a MAC data PDU, i.e., a data unit including a service data unit SDU, is preset. Unlike the existing MAC PDU structure that only includes zero or one MAC data PDU, the preset PDU structure provided in the embodiments of the present invention includes a plurality of MAC data PDUs.

Referring to fig. 1, in the existing MAC PDU structure, since the MAC PDU only contains one MAC data PDU at most, the length of the SDU in the MAC data PDU may be calculated according to the total length of the MAC PDU and the lengths of the MAC padding PDU and the MAC control PDU in the MAC PDU. In the embodiment of the present invention, since the preset PDU structure includes at least two MAC data PDUs, the length of the SDU in each MAC data PDU cannot be obtained through the calculation by the above method, and in order to facilitate the receiving end to analyze the MAC PDU, a length field is set in the MAC data PDU and used for indicating the length of the SDU in the MAC data PDU. Here, the length field may be a field of a fixed length, and the value indicated by the length field directly corresponds to the length of the SDU one-to-one according to a preset rule, and the length field may also include two parts, namely, an F field and an L field, where the F field is a format field, the L field is a length field, the format field F is used to indicate the length of the length field L, and the length field L is used to indicate the length of the SDU.

Step 320, transmitting the MAC PDU.

Specifically, after generating MAC PDUs based on a preset PDU structure, one TB may carry one MAC PDU at a time, thereby multiplexing signaling and MAC data PDUs corresponding to different services on one MAC PDU, that is, multiplexing MAC data PDUs from one or more logical channels to one TB.

The method provided by the embodiment of the invention multiplexes the MAC data PDUs corresponding to a plurality of logical channels on one MAC PDU for transmission, so as to realize the support of simultaneously transmitting signaling and one or more concurrent service data, effectively reduce the transmission delay, reduce the cost of a control channel and improve the parallel transmission efficiency of the data.

Based on the above embodiment, in the method, the preset PDU structure further includes a MAC padding PDU and/or a plurality of MAC control PDUs.

Here, both the MAC pad PDU and the MAC data PDU are variable length and byte aligned bit strings in length (i.e., multiples of 8 bits). A MAC Control PDU is a data unit containing a MAC CE (Control Element), and is a bit string (i.e., a multiple of 8 bits) aligned in bytes in length, and is currently fixed in length in the existing system. In the MAC PDU corresponding to the preset PDU structure, when the sum of the lengths of the MAC data PDU and the MAC control PDU in the MAC PDU does not meet the length of the preset MAC PDU, the MAC filling PDU is added to enable the length of the MAC PDU to meet the length of the preset MAC PDU. The preset MAC PDU length is determined by the TBsize length indicated by the downlink control information.

In addition, when the MAC data PDU exists in the preset PDU structure and the MAC padding PDU and/or the MAC control PDU exists, the embodiment of the present invention does not specifically limit the positions of the MAC data PDU, the MAC padding PDU, and the MAC control PDU in the preset PDU structure.

Based on any of the above embodiments, in the method, the preset PDU structure includes at least one of a first preset PDU structure, a second preset PDU structure, and a third preset PDU structure.

Here, in the first preset PDU structure, the second preset PDU structure, and the third preset PDU structure, the setting sequences of the MAC data PDU, the MAC padding PDU, and the MAC control PDU are different from each other, and the transmitting end and the receiving end may pre-select any two of the three preset PDU structures to be used for uplink data transmission and downlink data transmission, respectively, or pre-select any one of the three preset PDU structures to be used for uplink data transmission and downlink data transmission, which is not specifically limited in the embodiment of the present invention.

Fig. 4 is a schematic diagram of a first preset PDU structure according to an embodiment of the present invention, and as shown in fig. 4, the first preset PDU structure is set according to an order of a MAC padding PDU, a MAC control PDU, and a MAC data PDU.

Specifically, in the MAC PDU corresponding to the first preset PDU structure shown in fig. 4, a MAC Padding PDU (MAC Padding PDU) is optional (opt), the MAC Padding PDU is set at the head of the MAC PDU, n MAC Control PDUs (MAC Control PDUs) are set after the MAC Padding PDU, n is a natural number, and zero, one, or multiple MAC Data PDUs (MAC Data PDUs) are set at the tail of the MAC PDU. The MAC Padding PDU may include an LCID field, an F field, and an L field, or may also include an LCID field, an F field, an L field, and a Padding part (Padding), the MAC control PDU includes the LCID field and a MAC CE, and the MAC data PDU includes the LCID field, the F field, the L field, and an SDU.

Compared with the MAC PDU structure in the prior art shown in fig. 1, the first preset PDU structure only modifies the internal structure of the MAC data PDU, so that the amount of change is reduced as much as possible on the basis of the MAC PDU structure in the prior art, and the adaptation efficiency of the system to a new PDU structure can be improved while the requirement of multi-service concurrency is met.

Fig. 5 is a schematic diagram of a second preset PDU structure according to an embodiment of the present invention, and as shown in fig. 5, the second preset PDU structure is set according to an order of a MAC control PDU, a MAC data PDU, and a MAC padding PDU.

Specifically, in the MAC PDU corresponding to the second preset PDU structure shown in fig. 5, n MAC control PDUs are arranged at the head of the MAC PDU, zero, one, or more MAC data PDUs are arranged after the MAC control PDUs, and the MAC padding PDU is arranged at the tail of the MAC PDU. The second preset PDU structure sets the MAC control PDU to the header of the MAC PDU, contributing to the priority processing of the MAC CE.

Fig. 6 is a schematic diagram of a third preset PDU structure according to an embodiment of the present invention, and as shown in fig. 6, the third preset PDU structure is set according to an order of a MAC data PDU, a MAC control PDU, and a MAC padding PDU.

Specifically, in the MAC PDU corresponding to the third preset PDU structure shown in fig. 6, zero, one, or more MAC data PDUs are arranged at the head of the MAC PDU, n MAC control PDUs are arranged after the MAC data PDU, and the MAC padding PDU is arranged at the tail of the MAC PDU. The third preset PDU structure is applied to the transmitting end, which is beneficial to the transmitting end to form the MAC data PDU part in the MAC PDU in advance so as to accelerate the processing speed, and in addition, the MAC control PDU is arranged behind the MAC data PDU, and the receiving end can start processing from the tail part of the MAC PDU so as to process the MAC CE preferentially.

It should be noted that, in the first preset PDU structure, the second preset PDU structure, and the third preset PDU structure, the number of MAC data PDUs may be zero, one, or multiple, and when the number of MAC data PDUs is multiple, the MAC data PDUs corresponding to multiple logical channels may be multiplexed on one MAC PDU for transmission.

Based on any of the above embodiments, in the method, step 310 specifically includes: when the current data is downlink, generating MAC PDU of a downlink PDU structure; the downlink PDU structure is any one of a first preset PDU structure, a second preset PDU structure and a third preset PDU structure; when the current data is uplink, generating MAC PDU of an uplink PDU structure; the uplink PDU structure is any one of a first preset PDU structure, a second preset PDU structure and a third preset PDU structure.

Specifically, the downlink PDU structure is a preset PDU structure for downlink transmission, the uplink PDU structure is a preset PDU structure for uplink transmission, and both the downlink PDU structure and the uplink PDU structure can be any one of a first preset PDU structure, a second preset PDU structure and a third preset PDU structure, and the downlink PDU structure and the uplink PDU structure can be the same preset PDU structure or different preset PDU structures.

For example, the first preset PDU structure may be simultaneously applied to uplink and downlink data transmission as an uplink PDU structure and a downlink PDU structure, the second preset PDU structure may be simultaneously applied to uplink and downlink data transmission as an uplink PDU structure and a downlink PDU structure, and the third preset PDU structure may be simultaneously applied to uplink and downlink data transmission as an uplink PDU structure and a downlink PDU structure. In addition, the first preset PDU structure may be used as an uplink PDU structure, the third preset PDU structure may be used as a downlink PDU structure, the second preset PDU structure may be used as an uplink PDU structure, and the first preset PDU structure is used as a downlink PDU structure.

Based on any of the above embodiments, in the method, the downlink PDU structure is a second preset PDU structure, and the uplink PDU structure is a third preset PDU structure. Correspondingly, if the current data is downlink, generating an MAC PDU with a second preset PDU structure; and if the current data is uplink, generating the MAC PDU with a third preset PDU structure.

Specifically, when the transmitting terminal is a base station, downlink data, namely current data downlink, is sent to the terminal, and at this time, a second preset PDU structure is selected as a preset PDU structure to generate an MAC PDU; and when the transmitting terminal is a terminal, transmitting uplink data, namely current data uplink to the base station, and selecting a third preset PDU structure as a preset PDU structure to generate the MAC PDU.

Considering that the processing capability of the base station is generally better than that of the terminal, the second preset PDU structure is applied to downlink data transmission, and the MAC control PDU is arranged at the head of the MAC PDU, so that the terminal can realize the priority processing of the MAC CE after receiving the MAC PDU; and applying a third preset PDU structure to uplink data transmission, so that when the terminal is used as a transmitting end, the MAC data PDU part in the MAC PDU can be formed in advance to accelerate the processing speed, and in addition, after receiving the MAC PDU, the base station can analyze from the tail part of the MAC PDU, thereby processing the MAC CE in advance. The second preset PDU structure and the third preset PDU structure are respectively used for downlink and uplink data transmission, so that both the base station and the terminal can process the MAC CE preferentially, and the processing efficiency of the related control information is improved.

Based on any of the above embodiments, in the method, the length field includes a format field and a length field, where the format field is used to indicate a length of the length field, and the length field is used to indicate a length of the SDU. The format field is typically identified as the F field and the length field is identified as the L field.

Table 1 is a mapping table of F field in MAC padding PDU, and table 2 is a mapping table of F field in MAC data PDU:

table 1 mapping table of F field in MAC padding PDU

Index	L field size (bit number)
		0	4
1	12

Table 2 mapping table of F field in MAC data PDU

Index	L field size (bit number)
		0	7
1	15

In addition, the mapping relationship of F fields in the MAC padding PDU and the MAC data PDU can be respectively represented by table 3 and table 4:

table 3 mapping table of F field in MAC padding PDU

Index	L field size (bit number)
		00	1
01	9
		10	17
11	Reservation

Table 4 mapping table of F field in MAC data PDU

Index	L field size (bit number)
		00	4
01	12
		10	20
11	Reservation

Based on any of the above embodiments, in the method, the MAC data PDU further includes an LCID field for indicating a logical channel corresponding to the SDU, and a length of the LCID field is greater than or equal to 3 bits. The length of the format field is more than or equal to 1 bit; the sum of the lengths of the LCID field, the format field and the length field is 8n +3 bits, n being a positive integer.

Specifically, LCID, i.e. logical channel identifier, is used in the MAC data PDU to indicate the logical channel corresponding to the SDU. In the prior art, the length of the LCID field of the MAC data PDU is 3 bits, and in order to support the concurrent requirement of multiple services, the number of logical channel identifiers may be increased by using a reserved value of the LCID field without changing the LCID field, that is, the number of logical channels used for service transmission may be increased, or the length of the LCID field may be increased, so as to increase the number of logical channels that the LCID field can indicate, for example, the length of the LCID field may be increased to 5 bits.

Further, the total length of the MAC data PDU is an integer multiple of 8 bits. When the MAC data PDU includes an LCID field, a format field, a length field, and an SDU, in order to reduce the amount of change in development and avoid affecting the structure of the RLC PDU, it is necessary to maintain the length of the SDU in the MAC data PDU at 8n +5 bits, where n is a positive integer. In order to take account of the fact that the total length of the MAC data PDU is an integer multiple of 8 bits and the length of the SDU is 8n +5 bits, the sum of the lengths of the remaining fields in the MAC data PDU needs to be limited to 8n +3 bits, that is, the sum of the lengths of the LCID field, the format field, and the length field needs to be 8n +3 bits.

Based on any of the above embodiments, in the preset PDU structure, the MAC data PDU, the MAC control PDU, and the MAC padding PDU all include an LCID field. When the preset PDU structure is applied to the downlink shared channel, the value of the LCID field may be set according to table 5 or table 6:

TABLE 5 LCID values for downlink shared channels

Index	LCID value
		000	CCCH (Common Control Channel)
001-011	Logical channel identification
		100	Reservation
101	Communication terminal contention resolution identification
		110	TPC (Power control Command)/TA (Timing Advanced, maximum Timing Advance)
111	Padding (filling)

TABLE 6 LCID values for downlink shared channels

Index	LCID value
		000	CCCH
001-100	Logical channel identification
		101	Communication terminal contention resolution identification
110	TPC/TA
		111	Padding

It should be noted that table 5 and table 6 are different in that table 6 uses the Index value reserved in table 5 to perform logical channel identification, and adds a logical channel for service transmission.

When the preset PDU structure is applied to the uplink shared channel, the value of the LCID field may be set according to table 7 or table 8:

TABLE 7 LCID values for uplink shared channel

TABLE 8 LCID values for uplink shared channels

Index	LCID value
		000	CCCH
001- 100	Logical channel identification
		101	PHR/CQI
110	BSR
		111	Padding

It should be noted that table 7 and table 8 are different in that table 8 uses the Index value reserved in table 7 also for logical channel identification, and adds a logical channel for traffic transmission.

In addition, in order to support the multi-service concurrency requirement, the length of the LCID field may also be increased, so as to increase the number of logical channels that can be indicated by the LCID field, for example, the length of the LCID field may be increased to 5 bits. On this basis, in order not to change the control PDU with fixed length in the existing system, the values of LCID fields for the downlink shared channel and the uplink shared channel can be set according to table 9 and table 10, respectively:

TABLE 9 LCID values for downlink shared channels

Index	LCID value
		00000	CCCH
00001-01010	Logical channel identification
		01011-10011	Reservation
101XX	Competition resolution identification
		110XX	TPC/TA
11100-11110	Reservation
		11111	Padding

TABLE 10 LCID values for uplink shared channels

Index	LCID value
		00000	CCCH
00001-01010	Logical channel identification
		01011-10011	Reservation
101XX	PHR/CQI
		110XX	BSR
11100-11110	Reservation
		11111	Padding

In tables 9 and 10, the Index values of Index are 101XX and 110XX, X is 0 or 1, at this time, the corresponding MAC CE is determined by the first three bits of the Index value, the last 2 bits (i.e. XX) are left for the corresponding MAC CE, and the number of logical channels that can be indicated by the LCID field is increased while the structure of the existing MAC control PDU is guaranteed not to be modified.

Furthermore, the structure of the MAC control PDU may also be modified synchronously, and the values of the LCID fields of the corresponding downlink shared channel and uplink shared channel may be set according to tables 11 and 12, respectively:

TABLE 11 LCID values for downlink shared channels

Index	LCID value
		00000	CCCH
00001-01010	Logical channel identification
		01011-10110	Reservation
10111	Competition resolution identification
		11000	TPC/TA
11001-11110	Reservation
		11111	Padding

TABLE 12 LCID values for uplink shared channels

Index	LCID value
		00000	CCCH
00001-01010	Logical channel identification
		01011-10110	Reservation
10111	PHR/CQI
		11000	BSR
11001-11110	Reservation
		11111	Padding

On the basis of tables 11 and 12, the length of the MAC CE in the MAC control PDU is kept unchanged, and corresponding reserved bits are added to the MAC control PDU, so that the length of the modified MAC control PDU is still a fixed degree, and the MAC control PDU is a bit string aligned in bytes in length.

It should be noted that the field length in each table is designed to take into account that the length of the existing RLC PDU is 8 × n-3(n >1) bits. The length of the fields in the tables can not influence the RLC PDU structure, and the change amount of development can be reduced. If the development and modification amount is not considered, the RLC PDU structure can be correspondingly modified and designed according to the MAC PDU structure, the length of each field in the MAC PDU can be designed according to needs, and the embodiment of the invention does not specifically limit the length of each field.

Based on any of the above embodiments, fig. 7 is a schematic flowchart of a data transmission method of an LTE230 system according to another embodiment of the present invention, as shown in fig. 7, an execution subject of the method is a receiving end in the LTE230 system, where the receiving end may be a base station or a terminal, and the method includes:

step 710, receiving the MAC PDU.

Specifically, in the LTE230 system, after the transmitting end generates and transmits the MAC PDU based on the preset PDU structure, the receiving end receives the MAC PDU.

Step 720, analyzing the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any MAC data PDU comprises an SDU and a length field for indicating the length of the SDU.

In addition, in order to facilitate parsing of the MAC PDU, the preset PDU structure sets a length field in the MAC data PDU for indicating the length of the SDU in the MAC data PDU. Here, the length field may be a field of a fixed length, and the length field directly corresponds to the length of the SDU one-to-one according to a preset rule, and the length field may also include two parts, namely, an F field and an L field, where the F field is a format field, the L field is a length field, the format field F is used to indicate the length of the length field L, and the length field L is used to indicate the length of the SDU.

And after receiving the MAC PDU, analyzing the MAC PDU based on a preset PDU structure to obtain a signaling and MAC data PDUs corresponding to a plurality of different services. It should be noted that, before data transmission is performed, the transmitting end may determine a preset PDU structure in advance and send the preset PDU structure to the receiving end, or the receiving end may determine the preset PDU structure in advance and send the preset PDU structure to the transmitting end, so as to ensure that the preset PDU structures applied by the transmitting end and the receiving end are consistent in the data transmission process.

Based on any of the above embodiments, a data transmission method of an LTE230 system specifically includes the following steps:

when downlink data transmission is carried out, the base station generates MAC PDU of a second preset PDU structure and sends the MAC PDU to the terminal, wherein the second preset PDU structure is arranged according to the sequence of the MAC control PDU, the MAC data PDU and the MAC filling PDU. The terminal analyzes the MAC PDU after receiving the MAC PDU, and the MAC control PDU is arranged at the head of the MAC PDU, so that the terminal can process the MAC CE preferentially in the analysis process.

When uplink data transmission is carried out, the terminal generates MAC PDU of a third preset PDU structure and uploads the MAC PDU to the base station, wherein the third preset PDU structure is arranged according to the sequence of the MAC data PDU, the MAC control PDU and the MAC filling PDU. During the process of generating the MAC PDU, the terminal may form a MAC data PDU portion in the MAC PDU in advance to increase the processing speed. The base station analyzes the MAC PDU after receiving the MAC PDU, and the MAC control PDU is arranged in the middle of the MAC PDU, the MAC filling PDU is arranged at the tail of the MAC PDU, and the base station can begin to analyze from the tail, so that the MAC CE is processed in advance.

The method provided by the embodiment of the invention multiplexes the MAC data PDUs corresponding to a plurality of logical channels on one MAC PDU for transmission, so as to realize the support of simultaneously transmitting signaling and one or more concurrent service data, effectively reduce the transmission delay, reduce the cost of a control channel and improve the parallel transmission efficiency of the data. In addition, the second preset PDU structure and the third preset PDU structure are respectively used for downlink data transmission and uplink data transmission, so that both the base station and the terminal can process the MAC CE preferentially, and the processing efficiency of the related control information is improved.

Based on any of the above embodiments, fig. 8 is a schematic structural diagram of a transmitting end provided in the embodiments of the present invention, as shown in fig. 8, the transmitting end includes a generating unit 810 and a transmitting unit 820;

the generating unit 810 is configured to generate a MAC PDU of a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU;

a transmitting unit 820 is configured to transmit the MAC PDU.

The transmitting terminal provided by the embodiment of the invention multiplexes a plurality of MAC data PDUs on one MAC PDU for data transmission, can realize the transmission of the plurality of MAC data PDUs only by one TB, does not need to transmit through a plurality of TBs, effectively reduces the transmission delay, reduces the control channel overhead, improves the parallel transmission efficiency of the data, and can meet the concurrent requirements of multiple services.

Based on any of the above embodiments, in the transmitting end, the preset PDU structure further includes a MAC padding PDU and/or a plurality of MAC control PDUs.

Based on any of the above embodiments, in the transmitting end, the preset PDU structure includes at least one of a first preset PDU structure, a second preset PDU structure, and a third preset PDU structure;

Based on any of the above embodiments, in the transmitting end, the generating unit 810 is specifically configured to:

Based on any of the above embodiments, in the transmitting end, the downlink PDU structure is the second preset PDU structure, and the uplink PDU structure is the third preset PDU structure.

Based on any of the above embodiments, in the transmitting end, the length field includes a format field and a length field, where the format field is used to indicate a length of the length field, and the length field is used to indicate a length of an SDU.

Based on any of the above embodiments, in the transmitting end, the MAC data PDU further includes an LCID field for indicating a logical channel corresponding to the SDU, where a length of the LCID field is greater than or equal to 3 bits; the length of the format field is more than or equal to 1 bit;

Based on any of the above embodiments, fig. 9 is a schematic structural diagram of a receiving end according to an embodiment of the present invention, as shown in fig. 9, the receiving end includes a receiving unit 910 and an analyzing unit 920;

wherein, the receiving unit 910 is configured to receive a MAC PDU;

the parsing unit 920 is configured to parse the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU.

The receiving end provided by the embodiment of the invention multiplexes the MAC data PDUs corresponding to a plurality of logical channels on one MAC PDU for transmission, so as to realize the support of simultaneously transmitting signaling and one or more concurrent service data, effectively reduce transmission delay, reduce control channel overhead and improve the parallel transmission efficiency of data.

Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 10, the electronic device may include: a processor (processor)1010, a communication Interface (Communications Interface)1020, a memory (memory)1030, and a communication bus 1040, wherein the processor 1010, the communication Interface 1020, and the memory 1030 communicate with each other via the communication bus 1040. Processor 1010 may call logic instructions in memory 1030 to perform the following method: generating MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU; and transmitting the MAC PDU.

Processor 1010 may also call logic instructions in memory 1030 to perform the following method: receiving the MAC PDU; analyzing the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU.

Furthermore, the logic instructions in the memory 1030 can be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. 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 and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and the method includes: generating MAC PDU with a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU; and transmitting the MAC PDU.

Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and the method includes: receiving the MAC PDU; analyzing the MAC PDU based on a preset PDU structure; the preset PDU structure comprises a plurality of MAC data PDUs, and any one of the MAC data PDUs comprises an SDU and a length field for indicating the length of the SDU.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A data transmission method of an LTE230 system, comprising:

and transmitting the MAC PDU.

2. The data transmission method of the LTE230 system of claim 1, wherein the preset PDU structure further comprises a MAC padding PDU and/or several MAC control PDUs.

3. The data transmission method of the LTE230 system of claim 2, wherein the preset PDU structure comprises at least one of a first preset PDU structure, a second preset PDU structure and a third preset PDU structure;

4. The data transmission method of the LTE230 system according to claim 3, wherein the generating the MAC PDU with the preset PDU structure specifically includes:

5. The data transmission method of the LTE230 system of claim 4, wherein the downlink PDU structure is the second predetermined PDU structure, and the uplink PDU structure is the third predetermined PDU structure.

6. The data transmission method of the LTE230 system of any of claims 1-5, wherein the length field comprises a format field and a length field, wherein the format field is used for indicating the length of the length field, and the length field is used for indicating the length of SDU.

7. The data transmission method of the LTE230 system of claim 6, wherein the MAC data PDU further comprises an LCID field for indicating a logical channel corresponding to the SDU, and the length of the LCID field is greater than or equal to 3 bits; the length of the format field is more than or equal to 1 bit;

8. A data transmission method of an LTE230 system, comprising:

receiving the MAC PDU;

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the data transmission method of the LTE230 system as claimed in any one of claims 1 to 7 when executing the program.

10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, implements the steps of the data transmission method of the LTE230 system according to any one of claims 1 to 7.