CN105656597B

CN105656597B - Data transmission method and device

Info

Publication number: CN105656597B
Application number: CN201410682270.5A
Authority: CN
Inventors: 张屹; 唐臻飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-11-24
Filing date: 2014-11-24
Publication date: 2020-02-14
Anticipated expiration: 2034-11-24
Also published as: CN105656597A; WO2016082706A1

Abstract

The embodiment of the invention discloses a data transmission method and equipment, which are used for solving the problem that the frequency spectrum efficiency is reduced due to the frame structure limitation in the existing MBMS/eMBMS system under the scene of various station distances. The method comprises the following steps: determining a subframe for data transmission for user equipment in an MBSFN (multicast broadcast single frequency network) area according to at least one of information of moving speed characteristics of the MBSFN area and the radius of a cell in the MBSFN area or at least one of information of moving speed characteristics of the MBSFN area and the inter-station distance of the cell in the MBSFN area; and notifying the user equipment in the MBSFN area of the information related to the determined frame structure of the subframe for data transmission, thereby improving the flexibility of subframe selection and the spectrum efficiency.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and device.

Background

A Multimedia Broadcast/Multicast Service (MBMS) is a Service that provides the same data to a plurality of users at the same time. On the network bearer, the MBMS service is transmitted in a broadcast or multicast manner, so as to implement resource sharing of the network (including the core network and the access network), and implement services to as many multimedia users as possible and having the same requirements with as few resources as possible. The MBMS multimedia broadcast/multicast service single Frequency Network (MBSFN) transmission mode requires that all cells in a certain area transmit the same data packet at the same time and Frequency using the same modulation and coding mode.

Spectrum usage of a Long Term Evolution (LTE) MBMS/enhanced multimedia broadcast/multicast service (eMBMS) system includes the following two cases: one is that the MBMS system monopolizes one carrier, called dedicated carrier MBMS (DC-MBMS); the other is that MBMS and Unicast (Unicast) systems share one carrier, called mixed carrier MBMS (MC-MBMS). In mixed carrier MBMS, only up to 6 subframes can be used for MBMS transmission.

The subframe length of the current LTE system is 1ms (millisecond). For MC-MBMS, the frame structure is shown in fig. 1, each subframe includes 2 slots, each slot has 6 symbols, the subcarrier spacing is 15kHz, the Cyclic Prefix (CP) length is 16.67 μ s (microseconds), and the Resource Element (RE) in the shaded portion in the figure transmits the MBSFN reference signal. For the DC-MBMS, the frame structure is shown in fig. 2, each subframe includes 2 slots, each slot has 3 symbols, the subcarrier spacing is 7.5kHz, the CP length is 33.3 μ s, and the MBSFN reference signal is transmitted on the shaded REs in the figure.

It can be seen that only 15kHz and 7.5kHz subcarrier spacings are supported in the existing LTE MBMS/eMBMS system, and the CP length is only 16.6 μ s or 33.3 μ s. If the MBMS/eMBMS technology is introduced in a scene of convergence of television broadcasting and cellular, the MBMS/eMBMS technology is required to support a larger inter-station distance, but the CP length of the existing frame structure limits the performance of the MBSFN in a scene of a large inter-station distance. Under the scene of various station distances, due to the frame structure limitation in the existing MBMS/eMBMS system, the frequency spectrum efficiency is reduced.

Disclosure of Invention

The embodiment of the invention discloses a data transmission method and equipment, which solve the problem that the frequency spectrum efficiency is reduced due to the limitation of a frame structure in the conventional MBMS/eMBMS system in a scene with various station distances.

In a first aspect, a network device, the network device comprising:

a first determining module, configured to determine, according to at least one of information of a moving speed characteristic of an MBSFN area and a radius of a cell within the MBSFN area, or according to at least one of information of a moving speed characteristic of an MBSFN area and an inter-station distance of a cell within the MBSFN area, a subframe for data transmission for a user equipment within the MBSFN area;

a sending module, configured to notify the user equipment in the MBSFN area of information related to the frame structure of the subframe.

With reference to the first aspect, in a first possible implementation manner, the first determining module is specifically configured to:

if the moving speed characteristic of the MBSFN area is high-speed moving, the subframe determined for the user equipment in the MBSFN area is a subframe of the MBSFN defined by a 3GPP Release12 protocol; or

If the moving speed characteristic of the MBSFN area is non-high-speed moving and the maximum radius of a cell in the MBSFN area is smaller than or equal to a set radius threshold, determining a subframe for user equipment in the MBSFN area to be a subframe with the length being larger than 1ms and the CP length being smaller than the set threshold; or

If the moving speed characteristic of the MBSFN area is non-high-speed moving and the maximum inter-site distance of the cells in the MBSFN area is smaller than or equal to a set inter-site distance threshold, determining a subframe for user equipment in the MBSFN area to be a subframe with the length being larger than 1ms and the CP length being smaller than the set threshold; or

If the maximum radius of the cells in the MBSFN area is larger than a set radius threshold value, or the maximum inter-site distance of the cells in the MBSFN area is larger than a set inter-site distance threshold value, the subframe determined for the user equipment in the MBSFN area is a subframe with the length larger than 1ms and the CP length larger than or equal to the set threshold value.

With reference to the first aspect, in a second possible implementation manner, the sending module is specifically configured to:

notifying information related to the frame structure of the subframe to user equipment in the MBSFN area through an SIB message transmitted in a cell of a Long Term Evolution (LTE) system; or

Notifying the user equipment in the MBSFN area of information related to the frame structure of the sub-frame by sending different primary synchronization sequences to the user equipment, wherein the different primary synchronization sequences used by the MBSFN cell correspond to the information related to the frame structure of the different sub-frames; or

And notifying the information related to the frame structure of the subframe to user equipment in the MBSFN area through an MIB message transmitted in the MBSFN cell.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the information related to the frame structure of the subframe determined by the first determining module includes: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner, the subframe with a length greater than 1ms includes one of a subframe with a length of 2ms, a subframe with a length of 4ms, and a subframe with a length of 5 ms.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the subframe with the length of 2ms includes 2 or 3 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

only one RE for transmitting the reference signal is on the same subcarrier, or the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain;

the REs in which two adjacent reference signals on the same symbol are located are separated by 3 or 7 subcarriers in the frequency domain, or the REs in which two adjacent reference signals on different symbols are located are separated by 1 or 3 subcarriers in the frequency domain.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the frame structure of the subframe with the length of 2ms is:

the subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

With reference to the fourth possible implementation manner of the first aspect, in a seventh possible implementation manner, the subframe with the length of 4ms includes 4, 5, or 6 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

the RE where two adjacent reference signals on the same symbol are located is separated by 3 or 7 subcarrier subcarriers in the frequency domain, or the RE where two adjacent reference signals on different symbols are located is separated by 1 or 3 subcarrier subcarriers in the frequency domain.

With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, the frame structure of the subframe with the length of 4ms is:

the subcarrier spacing is 1.5kHz, and the CP length is 133.3 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

With reference to the fourth possible implementation manner of the first aspect, in a ninth possible implementation manner, the subframe with the length of 5ms includes 5, 6, or 8 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

only one RE for transmitting the reference signal is on the same subcarrier, or the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 or 3 symbols in the time domain;

the REs in which two adjacent reference signals on the same symbol are located are separated by 3, 7, 15 or 23 subcarriers in the frequency domain, or the REs in which two adjacent reference signals on different symbols are located are separated by 1 or 3 or 11 subcarriers in the frequency domain.

With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, a frame structure of the subframe with the length of 5ms is:

the subcarrier spacing is 1.25kHz and the CP length is 33.3 mus; or

The subcarrier spacing is 1.5kHz and the CP length is 166.67 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 91.67 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

With reference to the ninth possible implementation manner of the first aspect or the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner, the network device further includes: a second determination module;

the second determination module is to: determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each symbol;

or,

the second determination module is to: for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L2 of single-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each subframe;

or,

the second determination module is to: for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L4 of single-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each subframe;

or,

the second determination module is to: for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which represents a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission or an extended transport block size mapping table which represents a mapping relationship between TBS _ L1 and TBS _ L4 defined in a 3GPP Release12 protocol; the sending module is further configured to: and sending data to the user equipment according to the TBS value corresponding to each subframe.

With reference to the eleventh possible implementation manner of the first aspect, in a twelfth possible implementation manner, the determining, by the second determining module, a TBS value corresponding to the subframe according to a transport block size mapping table, which is defined in a 3GPP Release12 protocol and indicates a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission, or a transport block size mapping table, which is defined in a 3GPP Release12 protocol and indicates four-layer transmission, includes:

for a subframe with the length of 5ms and the number of REs in the subframe is 5 times of the MBSFN subframe of a 3GPP Release12 protocol, determining TBS _ L1 according to the size index of a transmission block and the number of physical resource blocks occupied by transmission, and taking a value obtained by multiplying TBS _ L1 by 5 as a first intermediate value;

if the first intermediate value is greater than 305976, determining TBS _ L4, which is smaller than or equal to the first intermediate value and has the smallest difference with the first intermediate value, in a transport block size mapping table representing four-layer transmission defined in the 3GPP Release12 protocol as the TBS value corresponding to the subframe;

otherwise, determining the TBS _ L4, which is smaller than or equal to the first intermediate value and has the smallest difference with the first intermediate value, in a transport block size mapping table representing the mapping relationship between TBS _ L1 and TBS _ L4 defined in the 3GPP Release12 protocol as the TBS value corresponding to the subframe.

With reference to the eleventh possible implementation manner of the first aspect, in a thirteenth possible implementation manner, the determining, by the second determining module, a TBS value corresponding to the subframe according to a transport block size mapping table, defined in a 3GPP Release12 protocol, that represents a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission, or a transport block size mapping table, defined in a 3GPP Release12 protocol, that represents four-layer transmission, includes:

for a subframe with the length of 5ms and the number of REs in the subframe is 6 times of the MBSFN subframe of a 3GPP Release12 protocol, determining TBS _ L1 according to the size index of a transmission block and the number of physical resource blocks occupied by transmission, and taking the value obtained by multiplying TBS _ L1 by 6 as a second intermediate value;

if the second intermediate value is greater than 375448, determining the second intermediate value as the TBS value corresponding to the subframe;

if the second median value is less than or equal to 375448 and greater than 305976, determining TBS _ L4, which is less than or equal to the second median value and has the smallest difference with the second median value, in a transport block size mapping table representing four-layer transmission defined in the 3GPP Release12 protocol as the TBS value corresponding to the subframe;

otherwise, determining the TBS _ L4, which is smaller than or equal to the second intermediate value and has the smallest difference with the second intermediate value, in a transport block size mapping table representing the mapping relationship between TBS _ L1 and TBS _ L4 defined in the 3GPP Release12 protocol as the TBS value corresponding to the subframe.

In a second aspect, a user equipment, the user equipment comprising:

the receiving module is used for receiving information which is sent by network equipment and is related to the frame structure of a subframe used for data transmission;

the first processing module is used for determining a subframe determined by the network equipment as the user equipment in the MBSFN area according to the information related to the frame structure received by the receiving module;

the subframe is determined by the network equipment according to at least one of the moving speed characteristic of the MBSFN area and the radius of the cell in the MBSFN area, or according to at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the subframe determined by the first processing module is:

a subframe of MBSFN defined by the 3GPP Release12 protocol; or

The length of the subframe is more than 1ms, and the CP length is less than a set threshold value; or

And the length of the subframe is more than 1ms, and the CP length is less than a set threshold value.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner, the receiving module is specifically configured to:

receiving information related to a frame structure of a subframe for data transmission, which is transmitted by the network equipment, through an SIB message transmitted in a Long Term Evolution (LTE) system cell; or

Receiving different primary synchronization sequences sent by the network equipment, wherein the different primary synchronization sequences used by the MBSFN cell correspond to different related information of a frame structure of a subframe used for data transmission; or

Receiving information related to a frame structure of a subframe for data transmission, which is transmitted by the network equipment, through an MIB message transmitted in the MBSFN cell.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the information related to the frame structure of the subframe used for data transmission includes: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

With reference to the second possible implementation manner of the second aspect, in a fifth possible implementation manner, the subframe with a length greater than 1ms includes one of a subframe with a length of 2ms, a subframe with a length of 4ms, and a subframe with a length of 5 ms.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, the user equipment further includes: a second processing module;

the second processing module is configured to: determining a Transport Block Size (TBS) value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; the receiving module is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each symbol;

or,

the second processing module is configured to: for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L2 of double-layer transmission; the receiving module is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each subframe;

or,

the second processing module is configured to: for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission; the receiving module is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each subframe;

or,

the second processing module is configured to: for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which represents a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission defined in a 3GPP Release12 protocol, or an extended transport block size mapping table which represents a mapping relationship between TBS _ L1 and TBS _ L4; the receiving module is further configured to: and receiving the data sent by the network equipment according to the TBS value corresponding to each subframe.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner, the determining, by the second processing module, the TBS value corresponding to the subframe according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission defined in a 3GPP Release12 protocol, or according to a transport block size mapping table that represents four-layer transmission defined in a 3GPP Release12 protocol, includes:

With reference to the sixth possible implementation manner of the second aspect, in an eighth possible implementation manner, the determining, by the second processing module, the TBS value corresponding to the subframe according to a transport block size mapping table that represents a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission defined in a 3GPP Release12 protocol, or according to a transport block size mapping table that represents four-layer transmission defined in a 3GPP Release12 protocol, includes:

In a third aspect, a data transmission method includes:

determining a subframe for data transmission for user equipment in an MBSFN (multicast broadcast single frequency network) area according to at least one of information of moving speed characteristics of the MBSFN area and the radius of a cell in the MBSFN area or at least one of information of moving speed characteristics of the MBSFN area and the inter-station distance of the cell in the MBSFN area;

and notifying the user equipment in the MBSFN area of the information related to the frame structure of the subframe.

In a fourth aspect, a method of data transmission, the method comprising:

receiving information related to a frame structure of a subframe used for data transmission, which is sent by a network device;

determining a subframe determined by the network equipment for the user equipment in the MBSFN area according to the received information related to the frame structure;

In a fifth aspect, a network device includes:

a processor, configured to determine a subframe for data transmission for a user equipment in an MBSFN area according to at least one of information of a moving speed characteristic of the MBSFN area and a radius of a cell in the MBSFN area, or at least one of information of a moving speed characteristic of the MBSFN area and an inter-station distance of a cell in the MBSFN area;

a transmitter, configured to notify user equipment in the MBSFN area of information related to a frame structure of the subframe.

In a sixth aspect, a user equipment comprises:

the receiver is used for receiving the frame structure information sent by the network equipment;

the processor is used for determining the subframe which is determined by the network equipment for the user equipment in the MBSFN area and is used for data transmission according to the frame structure information received by the receiver;

In the data transmission method and device provided by the embodiment of the invention, the network device determines the subframe for data transmission for the user equipment in the MBSFN area according to at least one of the moving speed characteristic of the MBSFN area and the radius of the cell in the MBSFN area, or according to at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area, so that the flexibility of subframe selection and the spectrum efficiency are improved.

Drawings

FIG. 1 is a diagram of a MC-MBMS frame structure in an LTE system;

FIG. 2 is a diagram of a DC-MBMS frame structure in an LTE system;

fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIGS. 4A-4D are schematic diagrams of pilot patterns of sub-frames with a length of 2ms according to an embodiment of the present invention;

FIGS. 5A-5C are schematic diagrams of pilot patterns of sub-frames with a length of 4ms according to an embodiment of the present invention;

FIGS. 6A-6B are schematic diagrams of pilot patterns of a subframe having a length of 5ms and including 5 symbols according to an embodiment of the present invention;

FIGS. 7A-7D are schematic diagrams of pilot patterns of a subframe having a length of 5ms and including 6 symbols according to an embodiment of the present invention;

FIGS. 8A-8C are schematic diagrams of pilot patterns of a subframe having a length of 5ms and including 8 symbols according to an embodiment of the present invention;

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

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

fig. 11 is a schematic structural diagram of another ue according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a data transmission method on a network device side according to an embodiment of the present invention;

fig. 13 is a schematic diagram of a data transmission method at a user equipment side according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

The technical solution described in this embodiment of the present invention may be used in an LTE communication system, a long term evolution-enhanced (LTE-a) communication system, and a communication system supporting MBMS in the next generation, where the network device in this embodiment of the present invention is a base station, for example, the base station may be an evolved Node B (NodeB or eNB or e-NodeB) in LTE, and this application is not limited thereto.

The user equipment in the embodiment of the present invention may be a wireless terminal or a wired terminal of a communication system supporting an LTE communication system, long term evolution-Advanced (LTE-a), and MBMS for the next generation, where the wireless terminal may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. For example, Personal Communication Service (PCS) phones, tablet computers, Personal Digital Assistants (PDAs), and the like.

As shown in fig. 3, a network device provided in an embodiment of the present invention includes:

a first determining module 31, configured to determine, according to at least one of information of a moving speed characteristic of an MBSFN area and a radius of a cell within the MBSFN area, or at least one of information of a moving speed characteristic of an MBSFN area and an inter-station distance of a cell within the MBSFN area, a subframe for data transmission for a user equipment within the MBSFN area;

a sending module 32, configured to notify the user equipment in the MBSFN area of information related to the frame structure of the subframe.

The network equipment provided by the embodiment of the invention determines the sub-frame for data transmission for the user equipment in the MBSFN area according to at least one of the moving speed characteristic of the MBSFN area and the radius of the cell in the MBSFN area or at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area, thereby improving the flexibility of sub-frame selection and the spectral efficiency.

In the embodiment of the present invention, the MBSFN area is an area formed by cells which are synchronized at the same timing and transmit the same information to the user equipment at a specific time and/or a specific frequency band, wherein the specific time is a preconfigured time and the specific frequency band is a preconfigured frequency band. The first determining module 31 determines a suitable subframe for the user equipment in the MBSFN area with the MBSFN area as the granularity, and the user equipment in the MBSFN area uses the same frame structure for data transmission. Wherein each MBSFN area comprises at least one cell. It should be noted that all the user equipments in the MBSFN area use subframes with the same frame structure.

In the embodiment of the invention, because the MBSFN area is adopted, the network equipment can send the frame structure of the determined subframe to the user equipment in a broadcasting or multicasting mode.

Specifically, the first determining module 31 may determine the subframes for data transmission for the user equipment in the MBSFN area by:

firstly, if The moving speed characteristic of The MBSFN area is high-speed moving, determining a subframe for user equipment in The MBSFN area as a third generation partnership project (The 3)^rdGeneration partnershift, 3GPP) version 12 (Release) of the MBSFN subframe.

The moving speed characteristic in the embodiment of the present invention refers to a moving characteristic of an area covered by a cell in an MBSFN area or a moving speed characteristic of a user equipment in the MBSFN area.

The moving speed characteristic is high-speed moving, that is, a specified moving speed in an area covered by a cell in the MBSFN area is greater than a set speed threshold (such as an expressway, a railway and the like), or a moving speed of the user equipment in the MBSFN area is greater than the set speed threshold. It will be appreciated that the speed threshold may be set according to actual requirements.

In this way, the frame structure of the MBSFN subframe defined by the 3gpp release12 protocol determined by the first determining module 31 for the user equipment in the MBSFN area is: the subcarrier spacing was 7.5kHz and the CP length was 33.3 μ s.

If the moving speed characteristic of the MBSFN area is non-high-speed moving and the maximum radius of the cell in the MBSFN area is smaller than or equal to a set radius threshold, the subframe determined for the user equipment in the MBSFN area is a subframe with the length larger than 1ms and the CP length smaller than the set threshold.

In this manner, the first determining module 31 may determine the moving speed characteristic of the MBSFN area according to the moving characteristic of the cell coverage area in the MBSFN area or the moving speed of the user equipment in the MBSFN area. The moving speed characteristic is that the moving speed is not high-speed moving, which means that a moving speed specified in an area covered by a cell in the MBSFN area is less than or equal to a set speed threshold (such as an urban road), or the moving speed of the user equipment in the MBSFN area is less than or equal to the set speed threshold.

In this way, the first determining module 31 may determine a frame structure with a length greater than 1ms and a smaller CP length for the ue in the MBSFN area, so as to reduce overhead of the CP length in one subframe and improve spectrum efficiency.

In this manner, the set threshold is an empirical value, and the threshold may be determined through system simulation, for example, the threshold is set to 50 μ s.

In this manner, the set radius threshold is an empirical value that can be determined by system simulation.

If the moving speed characteristic of the MBSFN area is non-high-speed moving and the maximum inter-station distance of the cells in the MBSFN area is smaller than or equal to a set inter-station distance threshold value, determining that the sub-frame determined for the user equipment in the MBSFN area is a sub-frame with the length larger than 1ms and the CP length smaller than the set threshold value.

In this way, the first determining module 31 may determine, for the user equipment in the MBSFN area, a frame structure with a length greater than 1ms and a smaller CP length, which may reduce overhead of the CP length in one subframe and improve spectrum efficiency.

In this way, the set inter-station distance threshold is an empirical value and can be determined through system simulation.

And if the maximum radius of the cell in the MBSFN area is greater than the set radius threshold, determining that the subframe for the user equipment in the MBSFN area is a subframe with the length greater than 1ms and the CP length greater than or equal to the set threshold.

In this way, if the maximum radius of the cell in the MBSFN area is greater than the set radius threshold, at this time, no matter the moving speed characteristic of the MBSFN area is high-speed moving or non-high-speed moving, the subframe determined for the user equipment in the MBSFN area is a subframe with a length greater than 1ms and a CP length greater than or equal to the set threshold, so that it can be ensured that the arrival time of the neighboring cell signal of the MBSFN cell is also less than the CP length, thereby reducing the neighboring cell interference and improving the spectrum efficiency.

In this way, further, the first determining module 31 determines, for the ue in the MBSFN area, the subframe whose length is greater than 1ms, CP length is greater than or equal to the set threshold, and subcarrier spacing is smaller than the set threshold, so that the overhead proportion of the CP is smaller.

The set threshold is an empirical value, and can be determined by system simulation, for example, the threshold is set to 50 ms.

And fifthly, if the maximum inter-site distance of the cells in the MBSFN area is larger than a set inter-site distance threshold, determining that the subframe for the user equipment in the MBSFN area is a subframe with the length larger than 1ms and the CP length larger than or equal to the set threshold.

In this way, if the maximum inter-site distance of the cell in the MBSFN area is greater than the set inter-site distance threshold, at this time, no matter the moving speed characteristic of the MBSFN area is high-speed moving or non-high-speed moving, the subframe determined for the user equipment in the MBSFN area is a subframe with a length greater than 1ms and a CP length greater than or equal to the set threshold, so as to ensure that the arrival time of the neighboring cell signal of the MBSFN cell is also less than the CP length, reduce the neighboring cell interference, and improve the spectrum efficiency.

In this way, further, the first determining module 31 may determine, for the ue in the MBSFN area, a subframe whose length is greater than 1ms, CP length is greater than or equal to a set threshold, and subcarrier spacing is smaller than the set threshold, so that the overhead proportion of the CP is smaller.

Based on any of the above embodiments, the subframes determined by the first determining module 31 for the user equipment in the MBSFN area include one of a subframe with a length of 2ms, a subframe with a length of 4ms, and a subframe with a length of 5 ms. The frame structure of these three subframes will be explained in detail below.

One, a subframe of length 2 ms.

In the frame structure, a subframe includes 2 or 3 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

The symbol according to the embodiment of the present invention generally refers to Orthogonal Frequency Division Multiplexing (OFDM).

For example, as shown in fig. 4A, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 2 symbols, there is only one RE used for transmitting the reference signal on the same subcarrier, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 4B, the shaded portion is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 2 symbols, there is only one RE used for transmitting the reference signal on the same subcarrier, and the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain. As shown in fig. 4C, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 3 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 4D, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 3 symbols, there is only one RE used for transmitting the reference signal on the same subcarrier, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain.

Under the frame structure, the initial value c of the reference signal sequence_initMay be generated according to a subframe number, a symbol position occupied by a reference signal, and an MBSFN area (area) Identity (ID):

wherein n is_SFIndicating the subframe number, l the symbol position occupied by the reference signal,indicates MBSFN area id.

Under the frame structure, the subframe with the length of 2ms comprises the following two frame structures:

the subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

Specifically, the sub-frame with the subcarrier spacing of 1.875kHz and the CP length of 133.3 μ s includes 3 symbols; the subcarrier spacing is 1.25kHz and a subframe with a CP length of 200 mus includes 2 symbols.

For example, the subframe with the length of 2ms may adopt the following two frame structures, as shown in table 1:

TABLE 1

In this frame structure, since the number of REs in each subframe is twice that of 1ms subframes, a subframe scheduling-based mechanism may be adopted, and a Transport Block Size mapping table representing a mapping relationship between a Transport Block Size (TBS) value TBS _ L1 for single-layer transmission and a TBS value TBS _ L2 for double-layer transmission may be multiplexed, so as to determine a TBS corresponding to each subframe, and transmit data to a user equipment. Specifically, the method comprises the following steps: the network device further includes: a second determination module 33;

the second determination module 33 is configured to: determining a TBS value corresponding to each subframe according to a transport block size mapping table of a mapping relation between TBS _ L1 and TBS _ L2 defined in a 3GPP Release12 protocol; and the number of the first and second groups,

the sending module 32 is further configured to: and sending data to the user equipment according to the TBS value corresponding to each subframe.

Specifically, the second determining module 33 determines the TBS value of single-layer transmission from the TBS mapping table representing single-layer transmission defined in the 3GPP Release12 protocol according to the transport block size index and the number of physical resource blocks occupied by transmission; and according to a transport block size mapping table of a mapping relation between TBS _1 and TBS _2 defined in the 3GPP protocol, taking TBS _ L2 corresponding to the determined TBS value of single-layer transmission as the TBS value corresponding to the subframe.

In this frame structure, the second determining module 33 may also modify the mechanism based on the sub-frame scheduling into the mechanism based on the symbol scheduling, so as to also multiplex the TBS mapping table representing single-layer transmission defined in the existing 3GPP Release12 protocol. The method comprises the following specific steps:

the second determining module 33 is specifically configured to: determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; and the number of the first and second groups,

the sending module 32 is further configured to: and sending data to the user equipment according to the TBS value corresponding to each symbol.

Specifically, the second determining module 33 determines a TBS value of single-layer transmission from a TBS mapping table representing single-layer transmission defined in the 3GPP Release12 protocol according to the transport block size index and the number of physical resource blocks occupied by transmission, and uses the determined TBS value as a TBS value corresponding to each symbol.

And two subframes with the length of 4 ms.

In the frame structure, a subframe includes 4, 5 or 6 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

The pilot pattern is described below by taking an example that each subframe includes 4 symbols, as shown in fig. 5A, the shaded portion in the figure is an RE where a reference signal is located, and as can be seen from the figure, each subframe includes 4 symbols, only one RE for transmitting the reference signal is located on the same subcarrier, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 5B, the shaded portion is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 4 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, and the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain. As shown in fig. 5C, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 4 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 3 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 1 subcarrier in the frequency domain.

Under the frame structure, reference signal sequence c_initMay be generated according to the subframe number, the location of the symbol and the MBSFN area ID:

under the frame structure, the subframe with the length of 4ms comprises the following three frame structures:

the subcarrier spacing is 1.5kHz, and the CP length is 133.3 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

Specifically, the subcarrier spacing is 1.5kHz, and a subframe with a CP length of 133.3 μ s includes 5 symbols; the sub-carrier interval is 1.875kHz, and the sub-frame with the CP length of 133.3 mu s comprises 6 symbols; the subcarrier spacing is 1.25kHz and the subframe with CP length of 200 mus includes 4 symbols.

For example, a subframe with a length of 4ms may adopt the following two frame structures, as shown in table 2:

TABLE 2

Under the frame structure, because the number of REs in each subframe is four times of that of 1ms subframes, a mechanism based on subframe scheduling can be adopted, a transport block size mapping table which is defined in the existing 3GPP Release12 protocol and represents the mapping relationship between the TBS value TBS _ L1 for single-layer transmission and the TBS value TBS _ L4 for four-layer transmission is multiplexed, the TBS value corresponding to each subframe is determined, and data is sent to the user equipment. Specifically, the method comprises the following steps: the network device further includes: a second determination module 33;

the second determination module 33 is configured to: determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L4 of four-layer transmission; and the number of the first and second groups,

Specifically, the second determining module 33 determines the TBS value of single-layer transmission from the TBS mapping table representing single-layer transmission defined in the 3GPP Release12 protocol according to the transport block size index and the number of physical resource blocks occupied by transmission; and according to a transport block size mapping table of a mapping relation between TBS _1 and TBS _4 defined in the 3GPP Release12 protocol, taking TBS _ L4 corresponding to the determined TBS value of single-layer transmission as the TBS value corresponding to the subframe.

the second determining module 33 is specifically configured to: determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; and

And thirdly, a subframe with the length of 5 ms.

Under the frame structure, for a subframe with the length of 5ms, the subframe comprises 5, 6 or 8 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

the REs in which two adjacent reference signals on the same symbol are located are separated by 3, 7, 15, or 23 subcarriers in the frequency domain, or the REs in which two adjacent reference signals on different symbols are located are separated by 1, 3, or 11 subcarriers in the frequency domain.

The pilot pattern is described below by taking an example that each subframe includes 5 symbols, as shown in fig. 6A, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 5 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 6B, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 5 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain.

In the following, each subframe includes 6 symbols as an example, and the pilot pattern is described as an example, as shown in fig. 7A, a shaded portion in the figure is an RE where a reference signal is located, as can be seen from the figure, each subframe includes 6 symbols, REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in a time domain, REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in a frequency domain, and REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 7B, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 6 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 23 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 11 subcarriers in the frequency domain. As shown in fig. 7C, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 6 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 15 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 7 subcarriers in the frequency domain. As shown in fig. 7D, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 6 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 15 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 7 subcarriers in the frequency domain.

The pilot pattern is described below by taking an example that each subframe includes 8 symbols, as shown in fig. 8A, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 8 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 8B, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 8 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 7 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 3 subcarriers in the frequency domain. As shown in fig. 8C, the shaded portion in the figure is the RE where the reference signal is located, and as can be seen from the figure, each subframe includes 8 symbols, the REs where two adjacent reference signals on the same subcarrier are located are separated by 3 symbols in the time domain, the REs where two adjacent reference signals on the same symbol are located are separated by 3 subcarriers in the frequency domain, and the REs where two adjacent reference signals on different symbols are located are separated by 1 subcarrier in the frequency domain.

Under the frame structure, for a subframe including 5 symbols, the initial value of the reference signal is:

under the frame structure, for a subframe including 6 symbols, the initial value of the reference signal is:

under the frame structure, for a subframe including 8 symbols, the initial value of the reference signal is:

under the frame structure, the subframe with the length of 5ms comprises the following four frame structures:

the subcarrier spacing is 1.25kHz and the CP length is 33.3 mus; or

The subcarrier spacing is 1.5kHz and the CP length is 166.67 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 91.67 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

Specifically, the sub-frame with the subcarrier spacing of 1.25kHz and the CP length of 33.3 μ s includes 6 symbols; the subcarrier spacing is 1.5kHz and the subframe with CP length 166.67 mus includes 6 symbols; the sub-carrier spacing is 1.875kHz, and the sub-frame with the CP length of 91.67 mus comprises 8 symbols; the subcarrier spacing is 1.25kHz and the subframe with a CP length of 200 mus includes 5 symbols.

For example, two frame structures of a subframe having a length of 5ms may be as shown in table 3:

TABLE 3

Under the frame structure, the network device further includes: a second determination module 33;

the second determination module 33 is configured to: determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L4 of four-layer transmission or an expanded transport block size mapping table which represents a mapping relation between TBS _ L1 and TBS _ L4; and the number of the first and second groups,

For the case of a 5ms Transmission Time Interval (TTI), for the case of 1/4CP, 1.25kHz subcarrier, the number of available REs is now increased by a factor of 5 relative to the conventional eMBMS; for the 1/24CP, 1.25kHz subcarrier case, the number of available REs is now increased by a factor of 6 relative to the conventional eMBMS. Therefore, when the subframe-based scheduling is adopted, a new TBS table needs to be redefined to define the mapping relationship between TBS _ L1 and TBS _ L5 and TBS _ L6, respectively. The method specifically comprises the following two conditions:

firstly, for a subframe with the length of 5ms, the number of REs in the subframe is 5 times of the MBSFN subframe of the 3GPP Release12 protocol.

The second determination module 33 is configured to: determining TBS _ L1 according to the index of the size of the transmission block and the number of physical resource blocks occupied by transmission, and taking the value obtained by multiplying TBS _ L1 by 5 as a first intermediate value;

And secondly, for a subframe with the length of 5ms, the number of REs in the subframe is 6 times that of the MBSFN subframe of the 3GPP Release12 protocol.

The second determination module 33 is configured to: determining TBS _ L1 according to the index of the size of the transmission block and the number of physical resource blocks occupied by transmission, and taking the value obtained by multiplying TBS _ L1 by 6 as a second intermediate value;

Table 4 shows a transport block size mapping table, which represents a mapping relationship between TBS _ L1 and TBS _ L4 defined in the existing 3GPP Release12 protocol:

TABLE 4

Part of the transport block size mapping table for a four-layer transmission, which is defined in the existing 3GPP Release12 protocol to represent a four-layer transmission, TBS _ L4, is shown in table 5:

TBS_L4
	305976
314888
	324336
339112
	351224
363336
	375448

TABLE 5

In the frame structure, the second determining module 33 may also modify the subframe scheduling based mode into the symbol scheduling based mode, so as to multiplex the transport block size mapping table representing single-layer transmission defined in the existing 3GPP Release12 protocol. The method comprises the following specific steps:

the second determination module 33 is configured to: determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; and

It should be noted that, in the embodiment of the present invention, the lengths of the subframes are 2ms, 4ms, and 5ms, respectively, for example, in practical application, other subframes with a length greater than 1ms may also be determined for the user equipment in the MBSFN area, which is not described herein one by one.

Based on any of the above embodiments, the sending module 32 sends the frame structure information of the subframe determined by the first determining module 31, and there may be a plurality of implementation manners:

firstly, notifying Information related to a frame structure of the subframe to user equipment in an MBSFN area through a System Information Block (SIB) message transmitted in an LTE System cell.

In this manner, if there is an LTE system cell capable of assisting the transmission of the configuration information of the dedicated carrier in the LTE system, the transmission module 32 may notify the user equipment in the MBSFN area of the information related to the frame structure of the subframe through an SIB message transmitted in the LTE system cell.

The LTE system cell refers to a cell in which all downlink subframes transmit unicast services (i.e., a cell that only transmits unicast services), or a cell in which a part of downlink subframes are used to transmit unicast services and a part of downlink subframes are used to transmit MBMS services (i.e., a cell in which unicast services and MBMS services are mixed).

For example, the sending module 32 may carry information related to the frame structure of the determined subframe in the SIB message through bit information, for example, 4 bits of information are used to indicate information related to frame structures of different subframes, 0001 indicates a subframe defined in the 3GPP Release12 protocol and having a length of 1ms, a CP length of 16.67 μ s, and a subcarrier spacing of 15 kHz; 0010 represents a subframe with a length of 1ms, a CP length of 33.3 μ s, and a subcarrier spacing of 7.5kHz defined in the 3GPP Release12 protocol; 0011 represents a subframe defined by the embodiment of the present invention, which has a length of 2ms, a CP length of 133.3 μ s, and a subcarrier spacing of 1.875 kHz; 0100 denotes a subframe defined in the embodiment of the present invention with a length of 2ms, a CP length of 200 μ s, and a subcarrier spacing of 1.25 kHz; and so on.

Of course, the embodiment of the present invention may also adopt other manners to carry the information related to the frame structure of the determined subframe in the SIB message, and the embodiment of the present invention is not limited to a specific manner, and all manners of notifying the user equipment of the information related to the frame structure of the determined subframe through the SIB message are covered in the protection scope of the embodiment of the present invention.

Secondly, the sending module 32 sends different primary synchronization sequences to the ue, and notifies the ue in the MBSFN area of information related to the frame structure of the subframe, where the different primary synchronization sequences used by the MBSFN cell correspond to the information related to the frame structure of different subframes.

In this manner, different primary synchronization sequences used by the MBSFN cell correspond to different frame structures, for example, if the synchronization sequence 1 is transmitted to the user equipment to indicate one frame structure using a subframe with a length of 1ms (for example, a subframe with a CP length of 16.67 μ s and a subcarrier spacing of 15 kHz), if the synchronization sequence 2 is transmitted to the user equipment to indicate a first frame structure using a subframe with a length of 5ms (that is, a subframe with a CP length of 33.3 μ s and a subcarrier spacing of 1.25 kHz), and so on. The specific synchronization sequence indicating which frame structure of which subframe may be determined by the network device and then notified to the user equipment, or determined by negotiation between the network device and the user equipment, or agreed in advance, as long as it is ensured that the network device and the user equipment understand which synchronization sequence indicates which frame structure of which subframe is consistent.

The MBSFN cell is a cell for transmitting only the dedicated carrier.

The method can be applied to the situation that the LTE system cell which can assist the transmission of the configuration information of the special carrier does not exist in the LTE system.

Third, the sending module 32 notifies the information related to the frame structure of the subframe to the user equipment in the MBSFN area through a Master Information Block (MIB) message sent in the MBSFN cell.

For example, the sending module 32 may carry information related to the determined frame structure of the subframe in the MIB message by using bit information. Of course, the embodiment of the present invention may also adopt other manners to carry information related to the determined frame structure of the subframe in the MIB message, and the embodiment of the present invention is not limited to the specific manner, and all manners of notifying the user equipment of the information related to the determined frame structure of the subframe through the MIB message are covered in the protection scope of the embodiment of the present invention.

Based on any of the above manners, the information related to the frame structure of the subframe determined by the first determining module 31 includes: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

It should be noted that other frame structure information of the subframe (such as fast fourier transform size, coverage, maximum supported moving speed, etc.) may be determined according to at least one of length information of CP of the subframe and the number of symbols in the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

It can be understood that the information related to the frame structure of the subframe may also be notified to the user equipment in the MBSFN area by other manners, for example, by a new message or using an information element of an existing other message, and the information related to the frame structure of the determined subframe is any information that can indicate specific information of the frame structure, for example, in addition to the above example, an index that has a corresponding relationship with the information related to the frame structure of the determined subframe may also be used.

Based on the same inventive concept, an embodiment of the present invention provides a user equipment, as shown in fig. 9, where the user equipment includes:

a receiving module 91, configured to receive information related to a frame structure of a subframe used for data transmission, sent by a network device;

a first processing module 92, configured to determine, according to the information related to the frame structure received by the receiving module 91, a subframe that is determined by the network device for the user equipment in the MBSFN area;

In implementation, the receiving module 91 is specifically configured to:

receiving information related to a frame structure of a subframe for data transmission, which is transmitted by the network equipment, through an SIB message transmitted within an LTE system cell; or

Receiving different primary synchronization sequences sent by the network equipment, wherein the different primary synchronization sequences used by the MBSFN cell correspond to different information related to the frame structure of the sub-frame used for data transmission; or

Specifically, the information related to the frame structure of the subframe for data transmission includes: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

Specifically, the subframe determined by the first processing module 92 is: a subframe of MBSFN defined by the 3GPP Release12 protocol; or, the length is greater than 1ms and the CP length is less than the subframe of the set threshold value; or, the length is greater than 1ms and the CP length is less than the set threshold value.

Wherein the sub-frame with the length greater than 1ms comprises one of a sub-frame with the length of 2ms, a sub-frame with the length of 4ms and a sub-frame with the length of 5 ms. The description of the frame structures of the subframe with the length of 2ms, the subframe with the length of 4ms and the subframe with the length of 5ms provided in the embodiment of the present invention may refer to the description in the network device, and is not described herein again.

In an implementation, the user equipment further comprises a second processing module 93;

the second processing module 93 is configured to: determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; the receiving module 91 is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each symbol;

or,

the second processing module 93 is configured to: for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L2 of single-layer transmission; the receiving module 91 is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each subframe;

or,

the second processing module 93 is configured to: for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L4 of single-layer transmission; the receiving module 91 is further configured to: receiving data sent by the network equipment according to the TBS value corresponding to each subframe;

or,

the second processing module 93 is configured to: for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which represents a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission or an extended transport block size mapping table which represents a mapping relationship between TBS _ L1 and TBS _ L4 defined in a 3GPP Release12 protocol; the receiving module 91 is further configured to: and receiving the data sent by the network equipment according to the TBS value corresponding to each subframe.

Specifically, the second processing module 93 determines the TBS value corresponding to the subframe according to a transport block size mapping table representing a mapping relationship between TBS _ L1 and TBS _ L4 of a single-layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table representing a four-layer transmission defined in a 3GPP Release12 protocol, including:

Based on the same inventive concept, an embodiment of the present invention provides another network device, as shown in fig. 10, where the network device includes:

a processor 101, configured to determine a subframe for data transmission for a user equipment in an MBSFN area according to at least one of information of a moving speed characteristic of the MBSFN area and a radius of a cell in the MBSFN area, or at least one of information of a moving speed characteristic of the MBSFN area and an inter-station distance of a cell in the MBSFN area;

a transmitter 102, configured to notify the user equipment in the MBSFN area of information related to the frame structure of the subframe.

In implementation, the functions specifically executed by the processor 101 are referred to the first determining module 31 and the second determining module 33 in the network device, and are not described herein again.

In implementation, the functions specifically performed by the transmitter 102 are referred to the transmitting module 32 in the network device, and are not described herein again.

Based on any of the above embodiments, the subframe with a length greater than 1ms determined by the processor 101 for the user equipment in the MBSFN area includes one of a subframe with a length of 2ms, a subframe with a length of 4ms, and a subframe with a length of 5 ms. For the description of the frame structures of the subframe with the length of 2ms, the subframe with the length of 4ms, and the subframe with the length of 5ms, reference may be made to the description in the network device, and details are not repeated here.

Based on the same inventive concept, an embodiment of the present invention further provides a user equipment, as shown in fig. 11, where the user equipment includes:

a receiver 111, configured to receive frame structure information sent by a network device;

a processor 112, configured to determine, according to the frame structure information received by the receiver 111, a subframe that is determined by the network device for a user equipment in an MBSFN area and is used for data transmission;

In implementation, the functions specifically executed by the receiver 111 are referred to the receiving module 91 in the user equipment, and are not described herein again.

In implementation, the functions specifically executed by the processor 112 are referred to the first processing module 92 and the second processing module 93 in the user equipment, and are not described herein again.

In implementation, the processor 112 determines that the subframe is: a subframe of MBSFN defined by the 3GPP Release12 protocol; or, the length is greater than 1ms and the CP length is less than the subframe of the set threshold value; or, the length is greater than 1ms and the CP length is less than the set threshold value.

Based on the same inventive concept, an embodiment of the present invention further provides a data transmission method on a network device side, as shown in fig. 12, where the method includes:

s121, determining a subframe for data transmission for user equipment in the MBSFN area according to at least one of the moving speed characteristic of the MBSFN area and the radius of the cell in the MBSFN area, or according to at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area.

In this step, the MBSFN area is used as the granularity to select a proper subframe for the ue in the MBSFN area, and the ue in the MBSFN area uses the same frame structure for data transmission. Wherein each MBSFN area comprises at least one cell.

S122, notifying the user equipment in the MBSFN area of the information related to the frame structure of the subframe.

In this step, since the MBSFN area is used, information related to the frame structure of the subframe may be transmitted to the user equipment in a broadcast or multicast manner.

In the embodiment of the invention, the optional subframe structures comprise an MBSFN subframe (with the length of 1ms) defined by a 3GPP Release12 protocol and a subframe with the length of more than 1ms, so that the optional frame structure is added under different networking scenes, and the flexibility and the spectrum efficiency are improved.

In the embodiment of the present invention, S121 to S122 may be implemented by a network side device, such as a base station.

Specifically, in S121, a subframe for data transmission may be determined for the user equipment in the MBSFN area by:

Based on any of the above embodiments, in S122, notifying the user equipment in the MBSFN area of information related to the frame structure of the subframe, including:

notifying information related to the frame structure of the subframe to user equipment in the MBSFN area through an SIB message transmitted in an LTE system cell; or

Specifically, the information related to the frame structure of the subframe determined in S121 includes: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

The subframe with the length greater than 1ms determined in S121 includes one of a subframe with a length of 2ms, a subframe with a length of 4ms, and a subframe with a length of 5 ms. The description of the frame structures of the subframe with the length of 2ms, the subframe with the length of 4ms and the subframe with the length of 5ms provided in the embodiment of the present invention may refer to the description in the network device, and is not described herein again.

In an implementation, in S122, after notifying information related to the frame structure of the subframe to the user equipment in the MBSFN area, the method may further include:

determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; and sending data to the user equipment according to the TBS value corresponding to each symbol; or,

for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between TBS values TBS _ L1 and TBS _ L2 of single-layer transmission, and sending data to the user equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between TBS values TBS _ L1 and TBS _ L4 of single-layer transmission, and sending data to the user equipment according to the TBS value corresponding to each subframe; or,

for a subframe with a length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table indicating a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission defined in a 3GPP Release12 protocol or an extended transport block size mapping table indicating a mapping relationship between TBS _ L1 and TBS _ L4, and transmitting data to the user equipment according to the TBS value corresponding to each subframe.

Specifically, determining the TBS value corresponding to the subframe according to a transport block size mapping table representing a mapping relationship between TBS values TBS _ L1 and TBS _ L4 of single-layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table representing four-layer transmission defined in a 3GPP Release12 protocol includes:

Based on the same inventive concept, an embodiment of the present invention further provides a data transmission method on a user equipment side, as shown in fig. 13, where the method includes:

s131, receiving information related to a frame structure of a subframe for data transmission, which is sent by network equipment;

s132, determining a subframe determined by the network equipment for the user equipment in the MBSFN area according to the received information related to the frame structure;

In an implementation, in S131, receiving information related to a frame structure of a subframe used for data transmission, which is sent by the network device, includes:

Receiving different primary synchronization sequences sent by the network equipment, wherein the different primary synchronization sequences used by the MBSFN cell correspond to the information related to the frame structures of different subframes; or

In an implementation, the subframe determined in S132 is:

a subframe of MBSFN defined by the 3GPP Release12 protocol; or, the length is greater than 1ms and the CP length is less than the subframe of the set threshold value; or, the length is greater than 1ms and the CP length is less than the set threshold value.

In an implementation, in S132, after determining that the network device is a subframe determined by the user equipment in the MBSFN area, the method further includes:

determining a TBS value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each symbol; or,

for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L2 of single-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between TBS values TBS _ L1 and TBS _ L4 of single-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which represents a mapping relationship between TBS values TBS _ L1 and TBS _ L4 for single-layer transmission or an extended transport block size mapping table which represents a mapping relationship between TBS _ L1 and TBS _ L4 defined in a 3GPP Release12 protocol; and receiving the data sent by the network equipment according to the TBS value corresponding to each subframe.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A network device, characterized in that the network device comprises:

a first determining module, configured to determine, according to at least one of a moving speed characteristic of an MBSFN area of a multimedia broadcast/multicast service and a radius of a cell in the MBSFN area, or according to at least one of a moving speed characteristic of the MBSFN area and an inter-site distance of a cell in the MBSFN area, a subframe for data transmission for a user equipment in the MBSFN area;

a sending module, configured to notify information related to the frame structure of the subframe to a user equipment in the MBSFN area;

the first determining module is specifically configured to:

if the moving speed characteristic of the MBSFN area is high-speed moving, determining the subframe for the user equipment in the MBSFN area as the subframe of the MBSFN defined by the protocol of the Release12 version of the third generation partnership project (3 GPP); or

If the moving speed characteristic of the MBSFN area is non-high-speed moving and the maximum radius of a cell in the MBSFN area is smaller than or equal to a set radius threshold, determining a subframe for user equipment in the MBSFN area to be a subframe with the length being larger than 1ms and the length of a Cyclic Prefix (CP) being smaller than the set threshold; or

2. The network device of claim 1, wherein the sending module is specifically configured to:

notifying information related to the frame structure of the subframe to user equipment in the MBSFN area through a System Information Block (SIB) message transmitted in a Long Term Evolution (LTE) system cell; or

And notifying information related to the frame structure of the subframe to user equipment in the MBSFN area through a Master Information Block (MIB) message sent in the MBSFN cell.

3. The network device of claim 2, wherein the information related to the frame structure of the subframe determined by the first determination module comprises: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

4. The network device of claim 1, wherein the subframes of length greater than 1ms comprise one of subframes of length 2ms, subframes of length 4ms, and subframes of length 5 ms.

5. The network device of claim 4, wherein the 2ms long subframe comprises 2 or 3 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

only one resource element RE for transmitting the reference signal is on the same subcarrier, or the REs where two adjacent reference signals on the same subcarrier are located are separated by 1 symbol in the time domain;

6. The network device of claim 5, wherein the subframe of length 2ms has a frame structure of:

the subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

7. The network device of claim 4, wherein the 4ms long subframe comprises 4, 5, or 6 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

8. The network device of claim 7, wherein the subframe of length 4ms has a frame structure of:

the subcarrier spacing is 1.5kHz, and the CP length is 133.3 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

9. The network device of claim 4, wherein the 5ms long subframe comprises 5, 6, or 8 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

10. The network device of claim 9, wherein the subframe of length 5ms has a frame structure of:

the subcarrier spacing is 1.25kHz and the CP length is 33.3 mus; or

The subcarrier spacing is 1.5kHz and the CP length is 166.67 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 91.67 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

11. The network device of claim 9 or 10, wherein the network device further comprises: a second determination module;

the second determination module is to: determining a Transport Block Size (TBS) value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each symbol;

or,

the second determination module is to: for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L2 of double-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each subframe;

or,

the second determination module is to: for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission; the sending module is further configured to: sending data to the user equipment according to the TBS value corresponding to each subframe;

or,

the second determination module is to: for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and indicates a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission, or an extended transport block size mapping table which indicates a mapping relationship between TBS _ L1 and TBS _ L4; the sending module is further configured to: and sending data to the user equipment according to the TBS value corresponding to each subframe.

12. The network device of claim 11, wherein the second determining module determines the TBS value corresponding to the subframe according to a transport block size mapping table of a mapping relationship between TBS values TBS _ L1 for single-layer transmission and TBS values TBS _ L4 for four-layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table for four-layer transmission defined in a 3GPP Release12 protocol, and comprises:

13. The network device of claim 11, wherein the second determining module determines the TBS value corresponding to the subframe according to a transport block size mapping table of a mapping relationship between TBS values TBS _ L1 for single-layer transmission and TBS values TBS _ L4 for four-layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table for four-layer transmission defined in a 3GPP Release12 protocol, and comprises:

14. A user equipment, characterized in that the user equipment comprises:

the first processing module is used for determining the subframe determined by the network equipment as the user equipment in the multimedia broadcast/multicast service MBSFN area according to the information related to the frame structure received by the receiving module;

the subframe is determined by the network equipment according to at least one of the moving speed characteristic of the MBSFN area and the radius of the cell in the MBSFN area, or at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area;

the subframe determined by the first processing module is as follows:

a subframe of MBSFN defined by the 3GPP Release12 protocol Release of the third Generation partnership project; or

The length of the subframe is more than 1ms, and the length of the cyclic prefix CP is less than a set threshold value; or

15. The user equipment of claim 14, wherein the receiving module is specifically configured to:

receiving information related to a frame structure of a subframe for data transmission, which is transmitted by the network equipment, through a System Information Block (SIB) message transmitted within a Long Term Evolution (LTE) system cell; or

Receiving information related to a frame structure of a subframe for data transmission, which is transmitted by the network equipment, through a master information block, MIB, message transmitted within the MBSFN cell.

16. The user equipment of claim 15, wherein the information related to the frame structure of the subframe used for data transmission comprises: at least one of length information of the cyclic prefix CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

17. The user equipment of claim 14, wherein the subframes of length greater than 1ms comprise one of subframes of length 2ms, subframes of length 4ms, and subframes of length 5 ms.

18. The user equipment of claim 17, wherein the user equipment further comprises: a second processing module;

or,

19. The user equipment of claim 18, wherein the second processing module determines the TBS value corresponding to the subframe according to a transport block size mapping table representing a mapping relationship between TBS values TBS _ L1 for single layer transmission and TBS values TBS _ L4 for four layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table representing four layer transmission defined in a 3GPP Release12 protocol, comprising:

20. The user equipment of claim 18, wherein the second processing module determines the TBS value corresponding to the subframe according to a transport block size mapping table representing a mapping relationship between TBS values TBS _ L1 for single layer transmission and TBS values TBS _ L4 for four layer transmission defined in a 3GPP Release12 protocol or a transport block size mapping table representing four layer transmission defined in a 3GPP Release12 protocol, comprising:

21. A method of data transmission, the method comprising:

determining a subframe for data transmission for user equipment in an MBSFN (multimedia broadcast/multicast service) area according to at least one of the moving speed characteristic of the MBSFN area and the radius of a cell in the MBSFN area or according to at least one of the moving speed characteristic of the MBSFN area and the inter-station distance of the cell in the MBSFN area;

notifying information related to the frame structure of the subframe to user equipment in the MBSFN area;

determining a subframe for data transmission for user equipment in an MBSFN (multicast broadcast single frequency network) area according to at least one of information of moving speed characteristics of the MBSFN area, radius of a cell in the MBSFN area and inter-station distance of the cell in the MBSFN area, wherein the subframe comprises:

22. The method of claim 21, wherein notifying user equipment within the MBSFN area of information related to the frame structure of the subframe comprises:

23. The method of claim 22, wherein the information related to the frame structure of the subframe comprises: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

24. The method of claim 21, wherein the subframes of length greater than 1ms comprise one of subframes of length 2ms, subframes of length 4ms, and subframes of length 5 ms.

25. The method of claim 24, wherein the 2ms long subframe comprises 2 or 3 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

26. The method according to claim 24 or 25, wherein the frame structure of the subframe of length 2ms is:

the subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

27. The method of claim 24, wherein the length-4 ms subframe comprises 4, 5, or 6 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

28. The method according to claim 24 or 27, wherein the frame structure of the subframe of length 4ms is:

the subcarrier spacing is 1.5kHz, and the CP length is 133.3 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 133.3 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

29. The method of claim 24, wherein the 5ms long subframe comprises 5, 6, or 8 symbols; the pilot pattern for transmitting the reference signal corresponding to the subframe is as follows:

30. The method according to claim 24 or 29, wherein the frame structure of the subframe of length 5ms is:

the subcarrier spacing is 1.25kHz and the CP length is 33.3 mus; or

The subcarrier spacing is 1.5kHz and the CP length is 166.67 mus; or

The subcarrier spacing is 1.875kHz, and the CP length is 91.67 mus; or

The subcarrier spacing was 1.25kHz and the CP length was 200 mus.

31. The method of claim 30, wherein after notifying user equipment within the MBSFN area of information related to the frame structure of the subframe, the method further comprises:

determining a Transport Block Size (TBS) value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; and sending data to the user equipment according to the TBS value corresponding to each symbol; or,

for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L2 of double-layer transmission, and sending data to the user equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents a mapping relation between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission, and sending data to the user equipment according to the TBS value corresponding to each subframe; or,

for a subframe with a length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and indicates a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission, or an extended transport block size mapping table which indicates a mapping relationship between TBS _ L1 and TBS _ L4, and transmitting data to the user equipment according to the TBS value corresponding to each subframe.

32. The method of claim 31, wherein determining the TBS value corresponding to the subframe according to a transport block size mapping table defining a mapping relationship between TBS values TBS _ L1 for single layer transmissions and TBS values TBS _ L4 for four layer transmissions in a 3GPP Release12 protocol or a transport block size mapping table defining a four layer transmission in a 3GPP Release12 protocol comprises:

33. The method of claim 31, wherein determining the TBS value corresponding to the subframe according to a transport block size mapping table defining a mapping relationship between TBS values TBS _ L1 for single layer transmissions and TBS values TBS _ L4 for four layer transmissions in a 3GPP Release12 protocol or a transport block size mapping table defining a four layer transmission in a 3GPP Release12 protocol comprises:

34. A method of data transmission, the method comprising:

determining a subframe determined by the network equipment for user equipment in a multimedia broadcast/multicast service MBSFN area according to the received information related to the frame structure;

the sub-frame is as follows: a subframe of MBSFN defined by the 3GPP Release12 protocol Release of the third Generation partnership project; or

35. The method of claim 34, wherein receiving information sent by the network device relating to a frame structure of a subframe used for data transmission comprises:

36. The method of claim 35, wherein the information related to the frame structure of the subframe comprises: at least one of length information of the CP and the number of symbols within the subframe, length information of the subframe, and subcarrier spacing information of the subframe.

37. The method of claim 36, wherein the subframes of length greater than 1ms comprise one of subframes of length 2ms, subframes of length 4ms, and subframes of length 5 ms.

38. The method of claim 37, wherein after determining the subframe determined by the network device for the user equipment in the MBSFN area, the method further comprises:

determining a Transport Block Size (TBS) value corresponding to each symbol according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents single-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each symbol; or,

for a subframe with the length of 2ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 of single-layer transmission and a TBS value TBS _ L2 of double-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 4ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and represents the mapping relation between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission; receiving data sent by the network equipment according to the TBS value corresponding to each subframe; or,

for a subframe with the length of 5ms, determining a TBS value corresponding to each subframe according to a transport block size mapping table which is defined in a 3GPP Release12 protocol and indicates a mapping relationship between a TBS value TBS _ L1 for single-layer transmission and a TBS value TBS _ L4 for four-layer transmission, or an extended transport block size mapping table which indicates a mapping relationship between TBS _ L1 and TBS _ L4; and receiving the data sent by the network equipment according to the TBS value corresponding to each subframe.

39. The method of claim 38, wherein determining the TBS value corresponding to the subframe according to a transport block size mapping table defining a mapping relationship between TBS values TBS _ L1 for single layer transmissions and TBS values TBS _ L4 for four layer transmissions in 3GPP Release12 protocol or a transport block size mapping table defining four layer transmissions in 3GPP Release12 protocol comprises:

40. The method of claim 38, wherein determining the TBS value corresponding to the subframe according to a transport block size mapping table defining a mapping relationship between TBS values TBS _ L1 for single layer transmissions and TBS values TBS _ L4 for four layer transmissions in 3GPP Release12 protocol or a transport block size mapping table defining four layer transmissions in 3GPP Release12 protocol comprises: