CN107026706B

CN107026706B - Data transmission method, system, base station and terminal

Info

Publication number: CN107026706B
Application number: CN201610070363.1A
Authority: CN
Inventors: 郑毅; 夏亮; 韩璐
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2020-02-11
Anticipated expiration: 2036-02-01
Also published as: CN107026706A

Abstract

The invention discloses a data transmission method.A base station generates first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode; the second channel is a channel with frequency greater than or equal to a preset frequency; sending the first control information to a terminal through a first channel; the first channel is a channel with a frequency less than a preset frequency. The invention also discloses a base station, a terminal and a data transmission system.

Description

Data transmission method, system, base station and terminal

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a data transmission method, system, base station, and terminal.

Background

The fifth generation mobile communication technology (5G) will provide greater transmission rates, higher traffic density, and require more frequency bandwidth. To meet such demand, 5G needs to make full use of higher frequency bands to transmit data. But the channel characteristics of the high frequency band are more strongly varied than the low frequency band. Therefore, the data transmission by using the high-frequency channel can face the problems of severe channel fluctuation, large Doppler frequency offset, sensitivity to shielding and the like, so that the reliability of transmission is reduced.

How to ensure the reliability of high-frequency transmission is a problem to be solved urgently at present.

Disclosure of Invention

In order to solve the existing technical problem, embodiments of the present invention provide a data transmission method, system, base station, and terminal.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

the embodiment of the invention provides a data transmission method, which is applied to a base station and comprises the following steps:

generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode; the second channel is a channel with frequency greater than or equal to a preset frequency;

sending the first control information to a terminal through a first channel; the first channel is a channel with a frequency less than a preset frequency.

In the above scheme, the first information is an absolute time of a transmission start time or symbol information of the transmission start time.

In the above scheme, the method further comprises:

generating second control information; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel;

and sending second control information to the terminal through the second channel.

In the foregoing solution, the first control information further includes: third information; the third information represents an end time of the transmission.

In the above scheme, the method further comprises:

generating third control information; the third control information is used for indicating the end time of data transmission on the second channel; transmitting the third control information to the terminal through the second channel;

alternatively, the first and second electrodes may be,

generating fourth control information; the fourth control information is used for indicating the end time of data transmission on the second channel; and sending the fourth control information to the terminal through the first channel.

The embodiment of the invention also provides a data transmission method, which is applied to a terminal and comprises the following steps:

receiving first control information sent by a base station through a first channel; the first control information is used for indicating control information used for transmitting data on a second channel; the first channel is a channel with frequency less than a preset frequency; the first control information comprises first information and second information;

determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; the second channel is a channel with frequency greater than or equal to a preset frequency;

and transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

In the above scheme, the first information is an absolute time of a transmission start time; correspondingly, determining the starting time of data transmission on the second channel according to the absolute time of the starting time of the data transmission;

alternatively, the first and second electrodes may be,

the first information is symbol information of a transmission starting moment; correspondingly, the determining a starting time of transmitting data on the second channel according to the first information includes:

performing channel synchronization on the second channel using the symbol information;

and determining the time after synchronization as the starting time of transmitting data on the second channel.

In the foregoing solution, transmitting data on the second channel at the determined start time and by using the determined transmission mode includes:

receiving second control information sent by the base station on the second channel; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel;

determining a transmission parameter corresponding to the current data transmission by using the second control information;

and correspondingly, transmitting data on the second channel by using the determined transmission mode and the determined transmission parameters.

In the above scheme, the first control information further includes third information; the third information represents the end time of transmission;

accordingly, the method further comprises:

determining an end time of data transmission on the second channel according to the third information;

terminating transmission of data on the second channel at the determined end time.

In the above scheme, the method further comprises:

receiving third control information sent by the base station through the second channel; the third control information is used for indicating the end time of data transmission on the second channel;

determining an end time of transmitting data on the second channel according to the third control information;

terminating transmission of data on the second channel at the determined end time;

alternatively, the first and second electrodes may be,

receiving fourth control information sent by the base station through the first channel; the fourth control information is used for indicating the end time of data transmission on the second channel;

determining an end time of data transmission on the second channel according to the fourth control information;

An embodiment of the present invention further provides a base station, including: a first generating unit and a first transmitting unit; wherein the content of the first and second substances,

the first generating unit is used for generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode; the second channel is a channel with frequency greater than or equal to a preset frequency;

the first sending unit is configured to send the first control information to a terminal through a first channel; the first channel is a channel with a frequency less than a preset frequency.

In the foregoing solution, the base station further includes: a second generating unit and a second transmitting unit; wherein the content of the first and second substances,

the second generating unit is used for generating second control information; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel;

the second sending unit is configured to send second control information to the terminal through the second channel.

In the foregoing solution, the base station further includes: a third generating unit and a third transmitting unit; wherein the content of the first and second substances,

the third generating unit is used for generating third control information; the third control information is used for indicating the end time of data transmission on the second channel;

the third sending unit is configured to send the third control information to the terminal through the second channel;

alternatively, the first and second electrodes may be,

the base station further comprises: a fourth generating unit and a fourth transmitting unit; wherein the content of the first and second substances,

the fourth generating unit is used for generating fourth control information; the fourth control information is used for indicating the end time of data transmission on the second channel;

the fourth sending unit is configured to send the fourth control information to the terminal through the first channel.

An embodiment of the present invention further provides a terminal, including: the device comprises a first receiving unit, a determining unit and a transmitting unit; wherein the content of the first and second substances,

the first receiving unit is configured to receive first control information sent by a base station through a first channel; the first control information is used for indicating control information used for transmitting data on a second channel; the first channel is a channel with frequency less than a preset frequency; the first control information comprises first information and second information;

the determining unit is configured to determine, according to the first information, a start time of data transmission on a second channel; determining a transmission mode for transmitting data on the second channel according to the second information; the second channel is a channel with frequency greater than or equal to a preset frequency;

and the transmission unit is used for transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

In the foregoing solution, the transmission unit is configured to receive, on the second channel, second control information sent by the base station; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel; transmitting data on the second channel by using the determined transmission mode and transmission parameters;

the determining unit is further configured to determine a transmission parameter corresponding to current data transmission by using the second control information.

the determining unit is further configured to determine, according to the third information, an end time of data transmission on the second channel;

accordingly, the transmission unit is further configured to terminate transmission of data on the second channel at the determined end time.

In the foregoing solution, the terminal further includes: a second receiving unit, configured to receive third control information sent by the base station through the second channel; the third control information is used for indicating the end time of data transmission on the second channel;

the determining unit is further configured to determine an end time of data transmission on the second channel according to the third control information;

the transmission unit is further configured to terminate transmission of data on the second channel at the determined end time;

alternatively, the first and second electrodes may be,

the terminal further comprises: a third receiving unit, configured to receive fourth control information sent by the base station through the first channel; the fourth control information is used for indicating the end time of data transmission on the second channel;

the determining unit is further configured to determine, according to the fourth control information, an end time of data transmission on the second channel;

the transmission unit is further configured to terminate transmission of data on the second channel at the determined end time.

An embodiment of the present invention further provides a data transmission system, including: a base station and a terminal; wherein the content of the first and second substances,

the base station is used for generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to the terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency;

the terminal is used for receiving first control information sent by the base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; the second channel is a channel with frequency greater than or equal to a preset frequency; and transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

According to the data transmission method, the system, the base station and the terminal provided by the embodiment of the invention, the base station generates first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to a terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency; the terminal receives first control information sent by a base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; and at the determined starting moment, transmitting data on the second channel by using the determined transmission mode, and transmitting the low-speed control information corresponding to the high-frequency channel by using the low-frequency channel, so that the signaling overhead during high-frequency transmission is reduced, and the reliability of high-frequency transmission is improved.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

Fig. 1 is a flowchart illustrating a method for transmitting data at a base station side according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for terminal-side data transmission according to an embodiment of the present invention;

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

FIG. 4 is a diagram illustrating high and low frequency band cooperative transmission according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a third base station according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a structure of a third terminal according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a data transmission system according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Since high-frequency electromagnetic waves are particulate and have large propagation loss due to strong penetration capability, when data is transmitted through a high-frequency channel, problems of severe channel fluctuation, large doppler frequency offset, sensitivity to occlusion, and the like occur, which leads to a decrease in reliability of a link, in other words, a decrease in reliability of transmission.

Based on this, in various embodiments of the invention: the base station generates first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to a terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency; the terminal receives first control information sent by a base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; and transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

Example one

The data transmission method of this embodiment is applied to a base station, and as shown in fig. 1, the method includes the following steps:

step 101: generating first control information;

here, the first control information is used to indicate control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode.

The second channel is a channel with frequency greater than or equal to a preset frequency.

In an embodiment, the first information may be an absolute time of a transmission start time, or may also be symbol information of the transmission start time.

In practical application, the symbol information may be defined as needed, in other words, the symbol information may be defined symbol information, for example, a synchronization symbol may be adopted, and it is assumed that a third synchronization symbol is adopted to start transmission; for example, the nth symbol after the synchronization symbol is used as the transmission start time.

Here, when the first cell corresponding to the first channel is synchronized with the second cell corresponding to the second channel, the base station may transmit an absolute time of a transmission start time to the terminal, and the terminal may determine the start time of data transmission on the second channel according to the absolute time.

When the first cell and the second cell cannot be synchronized, the base station may send symbol information of a transmission start time to the terminal, so that the terminal performs channel synchronization on the second channel by using the symbol information; and determining the time after synchronization as the starting time of transmitting data on the second channel.

The transmission mode comprises the following steps: the high frequency adopts a scheduling transmission mode or a frequency hopping transmission mode; the resource allocation adopts a discrete allocation mode or a continuous transmission mode; specific parameters of power control (such as a power value adopted by downlink or uplink transmission, or how many times the power is adjusted, how many step lengths are adjusted each time, etc.); the user multiplexing adopts power distribution or adopts code division or other modes; candidate multiple access modes; and feedback methods, etc.

Here, in actual application, the base station may determine the transmission mode of the terminal according to the location of the terminal.

In practical application, the first control information may further include: third information; the third information represents an end time of the transmission. The terminal may determine an end time of transmitting data in the second channel according to the third information.

The first control information may further include: fourth information; the fourth information characterizes a length of time for each transmission.

As can be seen from the above description, the first control information is relatively slowly changed according to the state of the high frequency channel, so the first control information may be referred to as slow control information (long-term control information) of the high frequency channel.

Step 102: sending the first control information to a terminal through a first channel; the first channel is a channel with a frequency less than a preset frequency.

Here, in actual application, the number of terminals may be at least one.

The preset frequency can be set according to needs, and typically, since the scheme in the embodiment of the present invention can solve the problem of low reliability of high frequency transmission, the preset frequency can be 6GHz, so as to divide a channel into a high frequency part and a low frequency part. Specifically, channels having a frequency of 6GHz or more are called high-frequency channels, and channels having a frequency of less than 6GHz are called low-frequency channels.

In an embodiment, during data transmission, the method may further include:

the base station generates second control information;

The second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel.

Here, in practical applications, the second control information may include Modulation and Coding Scheme (MCS), power, resource location, and other information for each transmission. These pieces of information are fast-changing according to the state of the channel and need to be adjusted according to the fast change of the high-frequency channel, so these pieces of information may be referred to as fast control information (short-time control information) of the high-frequency channel.

In an embodiment, when the data transmission needs to be ended, the method may further include:

the base station generates third control information;

and sending the third control information to the terminal through the second channel.

Wherein the third control information is used to indicate an end time of transmitting data on the second channel. Correspondingly, the terminal terminates the data transmission on the second channel after receiving the third control information through the second channel.

the base station generates fourth control information;

and sending the fourth control information to the terminal through the first channel.

Wherein the fourth control information is used to indicate an end time of transmitting data on the second channel. Correspondingly, the terminal terminates the data transmission on the second channel after receiving the fourth control information through the first channel.

The embodiment also provides a data transmission method, which is applied to a terminal, and as shown in fig. 2, the method includes the following steps:

step 201: receiving first control information sent by a base station through a first channel;

The first channel is a channel with a frequency less than a preset frequency. The second channel is a channel with frequency greater than or equal to a preset frequency.

The preset frequency can be set according to needs, and typically, the preset frequency can be 6GHz because the scheme in the embodiment of the invention can solve the problem of low reliability of high-frequency transmission, so that a channel is divided into a high-frequency part and a low-frequency part. Specifically, channels having a frequency of 6GHz or more are called high-frequency channels, and channels having a frequency of less than 6GHz are called low-frequency channels.

Step 202: determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information;

here, when a first cell corresponding to a first channel is synchronized with a second cell corresponding to a second channel, the base station may transmit an absolute time of a transmission start time, in other words, the first information is the absolute time of the transmission start time, to the terminal; accordingly, the terminal determines the starting time of data transmission on the second channel according to the absolute time of the starting time of data transmission.

When the first cell and the second cell cannot be synchronized, the base station may send symbol information of a transmission start time to the terminal, so that the terminal performs channel synchronization on the second channel by using the symbol information; and determining the synchronized time as the starting time of transmitting data on the second channel, thereby completing the determination of the starting time of transmitting data on the second channel.

In an embodiment, the first control information may further include: fourth information; the fourth information characterizes the time length of each transmission; accordingly, the terminal may determine the time length of each transmission according to the fourth information.

Step 203: and transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

In an embodiment, the specific implementation of step 203 may include:

receiving second control information sent by the base station on the second channel;

Here, in practical application, the terminal may receive, at a certain starting time and by using a certain transmission method, second control information sent by the base station on the second channel; determining a transmission parameter corresponding to the current data transmission by using the received second control information; transmitting data on the second channel by using the determined transmission mode and transmission parameters;

in the data transmission process, when the state of a channel changes, second control information sent by the base station is received on the second channel; re-determining transmission parameters corresponding to the current data transmission by using the currently received second control information; and transmitting data on the second channel by using the determined transmission mode and transmission parameters.

The second control information may include information of MCS, power, resource location, etc. for each transmission. These pieces of information are fast-changing according to the state of the channel and need to be adjusted according to the fast change of the high-frequency channel, so these pieces of information may be referred to as fast control information (short-time control information) of the high-frequency channel.

In practical application, the first control information may further include: third information; the third information represents the end time of transmission;

accordingly, the method may further comprise:

the terminal receives third control information sent by the base station through the second channel; determining an end time of transmitting data on the second channel according to the third control information;

Wherein the third control information is used to indicate an end time of transmitting data on the second channel.

the terminal receives fourth control information sent by the base station through the first channel;

Wherein the fourth control information is used to indicate an end time of transmitting data on the second channel.

The present embodiment further provides a data transmission method, as shown in fig. 3, the method includes the following steps:

step 301: the base station generates first control information; sending the first control information to a terminal through a first channel;

here, the first control information is used to indicate control information used for transmitting data on the second channel.

The first control information includes first information and second information.

The second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with a frequency less than a preset frequency.

Step 302: the terminal receives first control information sent by a base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information;

step 303: and the terminal transmits data on the second channel at the determined starting moment by using the determined transmission mode.

In practical applications, the number of the terminals may be at least one.

It should be noted that: the specific processing procedures of the base station and the terminal are described in detail above, and are not described in detail here.

In the data transmission method provided by the embodiment of the invention, a base station generates first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to a terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency; the terminal receives first control information sent by a base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; and at the determined starting moment, transmitting data on the second channel by using the determined transmission mode, and transmitting the low-speed control information corresponding to the high-frequency channel by using the low-frequency channel, so that the signaling overhead during high-frequency transmission is reduced, and the reliability of high-frequency transmission is improved.

In addition, the first control information is sent to the terminal through the first channel, the low-frequency channel is used for transmitting the low-speed control information corresponding to the high-frequency channel, and the approximate direction of the terminal obtained in the low-frequency transmission process is used for directly obtaining the direction and the weight value of the high frequency to be shaped, so that the time of searching in a high-frequency cell and searching in a beam by a low-frequency user can be reduced; meanwhile, as the slow control information is transmitted through the low-frequency channel, the control information transmitted at high frequency can contain more contents or finer granularity, so that the flexibility of a high-frequency transmission mode when a user transmits at high frequency is improved.

In addition, the second control information is sent to the terminal through the second channel, and the fast control information (short-time control information) is directly transmitted on the high-frequency channel, so that the high-frequency transmission can be matched with the fast change under the high-frequency channel in time, and the transmission efficiency and the reliability are further improved.

Example two

In this embodiment, on the basis of the first embodiment, how to perform the transmission mode of high and low frequency band cooperation is described in detail.

The application scenario of this embodiment is as follows: three User Equipments (UEs) are configured to transmit in a high frequency channel through a low frequency channel corresponding to a low frequency cell. The three UEs are UE1, UE2, and UE3, respectively, and the high frequency transmission duration is designated as t.

Fig. 4 shows a schematic diagram of high and low band cooperative transmission. With reference to fig. 4, the transmission method for high-frequency and low-frequency band cooperation of this embodiment mainly includes the following steps:

step 401: the base station respectively configures slow control information transmitted on a high-frequency channel for three UEs (UE1, UE2 and UE3) through low-frequency cells corresponding to the low-frequency channel;

here, the slow control information includes: the absolute time of the transmission start time (or the symbol information of the transmission start time) and the transmission mode (configuration information of the transmission). The slow control information may further include: the length of time of each transmission.

The base station can determine the transmission modes of the UE1, the UE2 and the UE3 according to the position of each UE;

the determined transmission mode comprises the following steps: the high frequency adopts a scheduling transmission mode or a frequency hopping transmission mode; the resource allocation adopts a discrete allocation mode or a continuous transmission mode; specific parameters for power control; the user multiplexing adopts power distribution or adopts code division or other modes; candidate multiple access modes; and feedback methods, etc.

In the configuration information, configuring UE, UE and UE to respectively adopt one precoding of sector-level precoding S, S, S and S, assuming that the precoding configured for the UE is S, namely UE- > S, and based on the configured precoding, configuring candidate precoding finely tuned for the UE, UE and UE, assuming that the candidate precoding configured for the UE is p, p, p, p, namely UE- > { p, p, p }, and the candidate precoding configured for the UE is p, p, p, namely UE- > { p, p, p }.

When the high frequency cell and the low frequency cell corresponding to the high frequency channel are synchronized, the base station configures the absolute time (such as the frame number) of the transmission start time.

And when the high-frequency cell and the low-frequency cell cannot be synchronized, the base station configures the symbol information of the transmission starting moment.

Step 402: after each UE receives the slow control information, determining the transmission starting time of the high-frequency channel according to the configured absolute time or symbol information of the transmission starting time, and receiving the fast control information transmitted on the high-frequency channel through the high-frequency cell at the determined starting time and the determined transmission mode; determining transmission parameters according to the quick control information;

here, when the symbol information of the transmission start time is configured, each UE needs to track the corresponding symbol, perform channel synchronization on the high-frequency channel, and use the initiation time of the synchronized service as the transmission start time of the high-frequency transmission.

The fast control information may include: information such as MCS, power, resource location, etc. of each transmission.

Step 403: each UE determines a transmission mode and transmission parameters according to the quick control information of the high-frequency cell and performs data transmission on a high-frequency channel;

among them, UE1, UE2, and UE3 start at their respective designated times (determined transmission start times) and perform data transmission according to the scheduling of the high frequency cell. In practical application, in the data transmission process, the base station continuously adjusts the MCS level adopted by each transmission of the UE1, the UE2 and the UE3 according to the current state of the channel, continuously adjusts the candidate precoding adopted each time based on the sector precoding, and notifies each UE of the fast control information of the high-frequency cell.

Step 404: the data transmission on the high frequency channel by each UE ends up to the designated transmission end time.

Here, the end time of transmission may be carried in the slow control information in step 401, or when data transmission needs to be ended, the base station may send control information for indicating the end time of data transmission on the high frequency channel to each UE through the low frequency cell; when data transmission needs to be finished, the base station may send control information indicating the end time of data transmission on the high-frequency channel to each UE through the high-frequency cell.

According to the scheme of the embodiment of the invention, the base station sends the control information to the terminal through the low-frequency channel, and the control information mainly comprises the slow-speed control information used by the terminal in the high-frequency channel. And other control information which is rapidly changed according to the state of the channel and needs to be adjusted, such as power control, scheduling information and other rapid control information, is directly transmitted in the high-frequency cell. The high frequency cell serves the terminal receiving the control information at a specific starting point (starting time of high frequency transmission), and performs different configurations (configuration by means of sending the fast control information) according to different transmission modes in the data transmission process until the specified transmission end time is finished.

As can be seen from the above description, the following advantages can be obtained by adopting the solution of the embodiment of the present invention:

first, by introducing long-term control information (slow control information) configured at a low frequency, it is possible to reduce the time for a cell search and a beam search at a high frequency by a low frequency user.

Secondly, part of the control information (slow control information) directly obtains the control information of the high-frequency cell through the low-frequency cell, and signaling overhead during high-frequency transmission is reduced. And the flexibility of the high-frequency transmission mode when the user transmits the high frequency is increased.

Finally, short-time control information (fast control information) is directly transmitted at high frequency, which is beneficial to timely matching between high-frequency transmission and fast change under a high-frequency channel, thereby further improving the transmission efficiency and reliability.

EXAMPLE III

To implement the method of the embodiment of the present invention, the embodiment provides a base station, as shown in fig. 5, where the base station includes: a first generation unit 51 and a first transmission unit 52; wherein the content of the first and second substances,

the first generating unit 51 is configured to generate first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode; the second channel is a channel with frequency greater than or equal to a preset frequency;

the first sending unit 52 is configured to send the first control information to a terminal through a first channel; the first channel is a channel with a frequency less than a preset frequency.

Here, when the first cell corresponding to the first channel is synchronized with the second cell corresponding to the second channel, the first generating unit 51 generates the first control information using the absolute time of the transmission start time; accordingly, the first sending unit 52 may send the absolute time of the transmission start time to the terminal, and the terminal may determine the start time of data transmission on the second channel according to the absolute time.

When the first cell and the second cell cannot be synchronized, the first generating unit 51 generates the first control information by using the symbol information of the transmission start time; accordingly, the first sending unit 52 may send symbol information of a transmission start time to the terminal, so that the terminal performs channel synchronization on the second channel by using the symbol information; and determining the time after synchronization as the starting time of transmitting data on the second channel.

In practical applications, the number of the terminals may be at least one.

In an embodiment, the base station may further include: a second generating unit and a second transmitting unit; the second generating unit is used for generating second control information in the data transmission process; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel;

Here, in practical application, the second control information may include information such as MCS, power, resource location, etc. of each transmission. These pieces of information are fast-changing according to the state of the channel and need to be adjusted according to the fast change of the high-frequency channel, so these pieces of information may be referred to as fast control information (short-time control information) of the high-frequency channel.

In an embodiment, the base station may further include: a third generating unit and a third transmitting unit; the third generating unit is configured to generate third control information when data transmission needs to be finished; the third control information is used for indicating the end time of data transmission on the second channel;

correspondingly, the terminal terminates the data transmission on the second channel after receiving the third control information through the second channel.

In an embodiment, the base station may further include: a fourth generating unit and a fourth transmitting unit; the fourth generating unit is configured to generate fourth control information when data transmission needs to be finished; the fourth control information is used for indicating the end time of data transmission on the second channel;

Correspondingly, the terminal terminates the data transmission on the second channel after receiving the fourth control information through the first channel.

In practical application, the first generating Unit 51, the second generating Unit, the third generating Unit and the fourth generating Unit may be implemented by a Central Processing Unit (CPU), a Microprocessor (MCU), a Digital Signal Processor (DSP), or a Programmable logic Array (FPGA) in the base station; the first, second, third and fourth transmitting

units

52, 52 may be implemented by transceivers in a base station.

In order to implement the method according to the embodiment of the present invention, this embodiment further provides a terminal, as shown in fig. 6, where the terminal includes: a first receiving unit 61, a determining unit 62 and a transmitting unit 63; wherein the content of the first and second substances,

the first receiving unit 61 is configured to receive first control information sent by a base station through a first channel; the first control information is used for indicating control information used for transmitting data on a second channel; the first channel is a channel with frequency less than a preset frequency; the first control information comprises first information and second information;

the determining unit 62 is configured to determine, according to the first information, a starting time of data transmission on the second channel; determining a transmission mode for transmitting data on the second channel according to the second information; the second channel is a channel with frequency greater than or equal to a preset frequency;

the transmission unit 63 is configured to transmit data on the second channel at the determined start time and by using the determined transmission manner.

When a first cell corresponding to a first channel is synchronized with a second cell corresponding to a second channel, the base station may send the absolute time of the transmission start time to the terminal, in other words, the first information is the absolute time of the transmission start time; accordingly, the determining unit 62 determines the starting time of the data transmission on the second channel according to the absolute time of the starting time of the data transmission.

When the first cell and the second cell cannot be synchronized, the base station may send symbol information of a transmission start time to the terminal, so that the determining unit 62 performs channel synchronization on the second channel by using the symbol information; and determining the synchronized time as the starting time of transmitting data on the second channel, thereby completing the determination of the starting time of transmitting data on the second channel.

In an embodiment, the first control information may further include: fourth information; the fourth information characterizes the time length of each transmission; accordingly, the determining unit 62 may determine the time length of each transmission according to the fourth information.

In an embodiment, the transmitting unit 63 is configured to receive, on the second channel, second control information sent by the base station; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel; transmitting data on the second channel by using the determined transmission mode and transmission parameters;

the determining unit 62 is further configured to determine, by using the second control information, a transmission parameter corresponding to the current data transmission.

Here, in practical application, the transmission unit 63 may receive, at a certain starting time and by using a certain transmission manner, second control information sent by the base station on the second channel; then, the determining unit 62 determines the transmission parameters corresponding to the current data transmission by using the received second control information; the transmission unit 63 then transmits data on the second channel by using the determined transmission mode and transmission parameters;

in the data transmission process, when the state of the channel changes, the transmission unit 63 receives the second control information sent by the base station on the second channel; the determining unit 62 re-determines the transmission parameters corresponding to the current data transmission by using the currently received second control information; the transmission unit 63 then transmits data on the second channel by using the determined transmission mode and transmission parameters.

In an embodiment, the terminal may further include: a second receiving unit, configured to receive third control information sent by the base station through the second channel; the third control information is used for indicating the end time of data transmission on the second channel;

the determining unit 62 is further configured to determine an end time of data transmission on the second channel according to the third control information;

the transmission unit 63 is further configured to terminate transmission of data on the second channel at the determined ending time.

In an embodiment, the terminal may further include: a third receiving unit, configured to receive fourth control information sent by the base station through the first channel; the fourth control information is used for indicating the end time of data transmission on the second channel;

the determining unit 62 is further configured to determine, according to the fourth control information, an end time of data transmission on the second channel;

In practical application, the first receiving unit 61, the second receiving unit, and the third receiving unit may be implemented by a receiver in a terminal; the determination unit 62 can be realized by a CPU, an MCU, a DSP or an FPGA in the terminal; the transmission unit 63 may be implemented by a transceiver combined with a CPU, MCU, DSP or FPGA in the terminal.

In order to implement the method according to the embodiment of the present invention, this embodiment further provides a data transmission system, as shown in fig. 7, where the system includes: a base station 71 and a terminal 72; wherein the content of the first and second substances,

the base station 71, configured to generate first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; and transmits the first control information to the terminal 72 through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency;

the terminal 72 is configured to receive, through a first channel, first control information sent by the base station 71; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; the second channel is a channel with frequency greater than or equal to a preset frequency; and transmitting data on the second channel at the determined starting moment by using the determined transmission mode.

In practical applications, the number of the terminals 72 may be at least one.

It should be noted that: the specific processing procedures of the base station 71 and the terminal 72 have been described in detail above, and are not described in detail here.

According to the scheme provided by the embodiment of the invention, a base station generates first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to a terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency; the terminal receives first control information sent by a base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information; and at the determined starting moment, transmitting data on the second channel by using the determined transmission mode, and transmitting the low-speed control information corresponding to the high-frequency channel by using the low-frequency channel, so that the signaling overhead during high-frequency transmission is reduced, and the reliability of high-frequency transmission is improved.

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 a hardware embodiment, a 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, 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.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A data transmission method, applied to a base station, the method comprising:

generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode, which comprises a transmission mode adopted by the terminal on a second channel, a transmission mode adopted by resource allocation, a power control parameter, a user multiplexing mode, a candidate multiple access mode and a feedback mode, and a transmission space parameter; the second channel is a channel with frequency greater than or equal to a preset frequency;

sending the first control information to a terminal through a first channel; the first channel is a channel with frequency less than a preset frequency;

sending second control information to the terminal through the second channel;

the transmission frequency of the second control information is greater than the transmission frequency of the first control information.

2. The method of claim 1, wherein the first information is an absolute time of a transmission start time or a symbol information of the transmission start time.

3. The method of claim 2, wherein the first control information further comprises: third information; the third information represents an end time of the transmission.

4. The method of claim 2, further comprising:

alternatively, the first and second electrodes may be,

5. A data transmission method, applied to a terminal, the method comprising:

determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information, wherein the transmission mode comprises a transmission mode adopted by the terminal on the second channel, a transmission mode adopted by resource allocation, a power control parameter, a user multiplexing mode, a candidate multiple access mode and a feedback mode, and a transmission space parameter; the second channel is a channel with frequency greater than or equal to a preset frequency;

receiving second control information sent by the base station on the second channel; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel; the transmission frequency of the second control information is greater than that of the first control information;

and transmitting data on the second channel by using the determined transmission mode and the determined transmission parameters at the determined starting moment.

6. The method of claim 5, wherein the first information is an absolute time of a transmission start time; correspondingly, determining the starting time of data transmission on the second channel according to the absolute time of the starting time of the data transmission;

alternatively, the first and second electrodes may be,

7. The method of claim 6, wherein the first control information further comprises third information; the third information represents the end time of transmission;

accordingly, the method further comprises:

8. The method of claim 6, further comprising:

alternatively, the first and second electrodes may be,

9. A base station, characterized in that the base station comprises: the device comprises a first generating unit, a first transmitting unit, a second generating unit and a second transmitting unit; wherein the content of the first and second substances,

the first generating unit is used for generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; the first information represents the starting moment of transmission; the second information represents a transmission mode, which comprises a transmission mode adopted by the terminal on a second channel, a transmission mode adopted by resource allocation, a power control parameter, a user multiplexing mode, a candidate multiple access mode and a feedback mode, and a transmission space parameter; the second channel is a channel with frequency greater than or equal to a preset frequency;

the first sending unit is configured to send the first control information to a terminal through a first channel; the first channel is a channel with frequency less than a preset frequency;

the second sending unit is configured to send second control information to the terminal through the second channel; the transmission frequency of the second control information is greater than the transmission frequency of the first control information.

10. The base station of claim 9, wherein the base station further comprises: a third generating unit and a third transmitting unit; wherein the content of the first and second substances,

alternatively, the first and second electrodes may be,

11. A terminal, characterized in that the terminal comprises: the device comprises a first receiving unit, a determining unit and a transmitting unit; wherein the content of the first and second substances,

the determining unit is configured to determine, according to the first information, a start time of data transmission on a second channel; determining a transmission mode for transmitting data on the second channel according to the second information, wherein the transmission mode comprises a transmission mode adopted by the terminal on the second channel, a transmission mode adopted by resource allocation, a power control parameter, a user multiplexing mode, a candidate multiple access mode and a feedback mode, and a transmission space parameter; the second channel is a channel with frequency greater than or equal to a preset frequency;

the transmission unit is configured to receive, on the second channel, second control information sent by the base station; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel; the transmission frequency of the second control information is greater than that of the first control information;

the determining unit is further configured to determine a transmission parameter corresponding to current data transmission by using the second control information;

the transmission unit is further configured to transmit data on the second channel at the determined start time by using the determined transmission mode and the determined transmission parameter.

12. The terminal of claim 11, wherein the first control information further comprises third information; the third information represents the end time of transmission;

13. The terminal of claim 11, wherein the terminal further comprises: a second receiving unit, configured to receive third control information sent by the base station through the second channel; the third control information is used for indicating the end time of data transmission on the second channel;

alternatively, the first and second electrodes may be,

14. A data transmission system, the system comprising: a base station and a terminal; wherein the content of the first and second substances,

the base station is used for generating first control information; the first control information is used for indicating control information used for transmitting data on a second channel; the first control information comprises first information and second information; sending the first control information to the terminal through a first channel; the second channel is a channel with frequency greater than or equal to a preset frequency; the first channel is a channel with frequency less than a preset frequency; generating second control information; the second control information is used for indicating control information related to the current state of the second channel in the process of transmitting data on the second channel; sending second control information to the terminal through the second channel; the transmission frequency of the second control information is greater than that of the first control information;

the terminal is used for receiving first control information sent by the base station through a first channel; determining the starting time of data transmission on a second channel according to the first information; determining a transmission mode for transmitting data on the second channel according to the second information, wherein the transmission mode comprises a transmission mode adopted by the terminal on the second channel, a transmission mode adopted by resource allocation, a power control parameter, a user multiplexing mode, a candidate multiple access mode and a feedback mode, and a transmission space parameter; receiving second control information sent by the base station on the second channel; determining a transmission parameter corresponding to the current data transmission by using the second control information;