CN104521286B

CN104521286B - Data transmission method, device and system

Info

Publication number: CN104521286B
Application number: CN201380001592.2A
Authority: CN
Inventors: 栗忠峰; 卢建民
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-08-07
Filing date: 2013-08-07
Publication date: 2020-08-14
Anticipated expiration: 2033-08-07
Also published as: WO2015018014A1; CN104521286A

Abstract

The embodiment of the invention provides a method, a device and a system for data transmission, which relate to the technical field of communication, wherein the method comprises the following steps: a base station allocates a first frequency resource for a terminal, wherein the bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station; and the base station sends the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives data sent by the base station according to the first frequency resource. The invention can improve the resource utilization rate of the wireless communication system.

Description

Data transmission method, device and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for data transmission.

Background

With the development of communication technology, narrow-band terminals are gradually emerging, especially Machine Type Communication (MTC) terminals based on MTC technology. Typical MTC applications may include environmental monitoring, smart meter reading, and the like. The narrowband terminal is characterized in that a transmitted data packet is small, the communication period is long, the cost requirement is low, the number is large, and the like, especially, the transmission bandwidth configuration of the narrowband terminal is much lower than that of a common terminal, the transmission bandwidth configuration of the common terminal can reach the maximum transmission bandwidth configuration of a base station on a single carrier, namely 100 Resource Blocks (RBs), and the transmission bandwidth configuration of the narrowband terminal is generally 6 RBs and far less than 100 RBs.

In a conventional wireless communication system (e.g., a Long Term Evolution (LTE) system), when a base station transmits data to a normal terminal, a subframe sent to the terminal includes downlink control information, and the downlink control information indicates that the terminal performs data extraction on at least one RB in a transmission bandwidth configuration. And the common terminal receives the RBs in the whole transmission bandwidth configuration and extracts the data on the indicated RBs from all the received RBs according to the control information in the received RBs.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

applying a narrow-band terminal to a traditional wireless communication system, wherein the narrow-band terminal receives data at a middle frequency resource position configured by a transmission bandwidth of a base station after accessing a network, and can only receive data within a transmission bandwidth configuration range (such as 6 RBs) of the narrow-band terminal, when data transmission is performed, if a control information sent by the base station indicates that a frequency resource position for extracting data to the terminal is not within a current transmission bandwidth configuration range of the terminal, then the narrow-band terminal can only obtain the data within the current transmission bandwidth configuration range after receiving a subframe carrying the control information, but cannot receive the data of the frequency resource position indicated by the control information, which results in that data transmission cannot be performed, so that based on the prior art, in the wireless communication system, the narrow-band terminal can only operate at the middle frequency resource position configured by the transmission bandwidth of the base station, thus, a large amount of system resources will be wasted.

Disclosure of Invention

In order to solve the above problems in the prior art, embodiments of the present invention provide a method, an apparatus, and a system for data transmission, so as to improve resource utilization of a wireless communication system. The technical scheme is as follows:

in a first aspect, a method for data transmission is provided, where the method includes:

a base station allocates a first frequency resource for a terminal, wherein the bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station;

and the base station sends the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives data sent by the base station according to the first frequency resource.

In a first possible implementation manner of the first aspect, the sending, by the base station, the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, includes:

and the base station sends the reference frequency information of the first frequency resource to the terminal, so that the terminal determines the reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determines the first frequency resource according to the reference frequency of the first frequency resource, the bandwidth of the first frequency resource and the relative position of the reference frequency of the first frequency resource in the first frequency resource.

In a second possible implementation manner of the first aspect, the sending, by the base station, the information of the first frequency resource to the terminal includes:

and the base station sends the reference frequency information of the first frequency resource and the bandwidth of the first frequency resource to the terminal.

With reference to the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the reference frequency of the first frequency resource includes: a start frequency, or an intermediate frequency, or an end frequency.

With reference to one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner, the reference frequency information includes: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

With reference to the first aspect or one of the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the sending, by the base station, the information of the first frequency resource to the terminal specifically is:

the base station sends the information of the first frequency resource to the terminal through a Physical Downlink Control Channel (PDCCH); alternatively, the first and second electrodes may be,

the base station sends the information of the first frequency resource to the terminal through an Enhanced Physical Downlink Control Channel (EPDCCH); alternatively, the first and second electrodes may be,

the base station sends the information of the first frequency resource to the terminal through a broadcast channel; alternatively, the first and second electrodes may be,

and the base station sends the information of the first frequency resource to the terminal through a Physical Downlink Shared Channel (PDSCH).

With reference to the first aspect or one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the allocating, by a base station, a first frequency resource for a terminal includes:

the base station divides at least one frequency resource according to the transmission bandwidth configuration of the base station, and the bandwidth of the at least one frequency resource is less than or equal to the transmission bandwidth configuration of the terminal;

the base station determines a first frequency resource to be allocated to the terminal from the at least one frequency resource.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the sending, by the base station, information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives data sent by the base station according to the first frequency resource includes:

and the base station sends the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives a reference signal sent by the base station on at least one frequency resource according to the first frequency resource.

With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the sending, by the base station, information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives, according to the first frequency resource, a reference signal sent by the base station on the at least one frequency resource, includes:

and the base station sends the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives a reference signal sent by the base station on the at least one frequency resource by using the same reference signal sequence according to the first frequency resource.

With reference to the seventh or eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the sending, by the base station, the information of the first frequency resource to the terminal includes:

and the base station sends the information of the first frequency resource and the reference signal information corresponding to the at least one frequency resource to the terminal.

With reference to one of the seventh to ninth possible implementation manners of the first aspect, in a tenth possible implementation manner of the first aspect, the method further includes:

the base station determines that the REs used by the CRS are not included in the REs used by the EREG.

With reference to one of the first to tenth possible implementation manners of the first aspect, in an eleventh possible implementation manner of the first aspect, after the sending, by the base station, the information of the first frequency resource to the terminal, the method further includes:

and the base station sends data on at least one subcarrier, wherein the subcarrier comprises a subcarrier corresponding to the reference frequency.

In a second aspect, a method for data transmission is provided, the method comprising:

a terminal receives information of a first frequency resource sent by a base station;

the terminal determines the first frequency resource according to the information of the first frequency resource;

and the terminal receives the data sent by the base station according to the first frequency resource.

In a first possible implementation manner of the second aspect, the information of the first frequency resource includes: reference frequency information of the first frequency resource;

the terminal determines the first frequency resource according to the information of the first frequency resource, and the determining includes:

and the terminal determines the reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determines the first frequency resource according to the reference frequency of the first frequency resource, the bandwidth of the first frequency resource and the relative position of the reference frequency of the first frequency resource in the first frequency resource.

In a second possible implementation manner of the second aspect, the information of the first frequency resource includes: reference frequency information of the first frequency resource and a bandwidth of the first frequency resource;

With reference to the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the reference frequency of the first frequency resource includes: a start frequency, or an intermediate frequency, or an end frequency.

With reference to one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the reference frequency information includes: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

With reference to the second aspect or one of the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the receiving, by the terminal, information of a first frequency resource sent by a base station specifically includes:

the terminal receives information of a first frequency resource sent by a base station through a Physical Downlink Control Channel (PDCCH); alternatively, the first and second electrodes may be,

the terminal receives information of a first frequency resource sent by a base station through an Enhanced Physical Downlink Control Channel (EPDCCH); alternatively, the first and second electrodes may be,

the terminal receives information of a first frequency resource sent by a base station through a broadcast channel; alternatively, the first and second electrodes may be,

and the terminal receives the information of the first frequency resource sent by the base station through a Physical Downlink Shared Channel (PDSCH).

With reference to the second aspect or one of the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation manner of the second aspect, the receiving, by the terminal, data sent by the base station according to the first frequency resource includes:

and the terminal receives the reference signal sent by the base station according to the first frequency resource.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the receiving, by the terminal, information of a first frequency resource sent by a base station includes:

the terminal receives information of a first frequency resource and reference signal information corresponding to at least one frequency resource sent by a base station, wherein the at least one frequency resource is divided by the base station according to transmission bandwidth configuration of the base station, and the bandwidth of the at least one frequency resource is less than or equal to the transmission bandwidth configuration of the terminal.

With reference to the sixth or seventh possible implementation manner of the second aspect, in an eighth possible implementation manner of the second aspect, the method further includes:

and the terminal carries out channel estimation, time domain or frequency domain synchronization or channel quality measurement according to the received reference signal and the reference signal information.

In a third aspect, a base station is provided, which includes:

an allocation module, configured to allocate a first frequency resource to a terminal, where a bandwidth of the first frequency resource is less than or equal to a transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than a transmission bandwidth configuration of the base station;

a sending module, configured to send the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives data sent by the base station according to the first frequency resource.

In a first possible implementation manner of the third aspect, the sending module is configured to:

sending the reference frequency information of the first frequency resource to the terminal, so that the terminal determines the reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determines the first frequency resource according to the reference frequency of the first frequency resource, the bandwidth of the first frequency resource and the relative position of the reference frequency of the first frequency resource in the first frequency resource.

In a second possible implementation manner of the third aspect, the sending module is configured to:

and sending the reference frequency information of the first frequency resource and the bandwidth of the first frequency resource to the terminal.

With reference to the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the reference frequency of the first frequency resource includes: a start frequency, or an intermediate frequency, or an end frequency.

With reference to one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner, the reference frequency information includes: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

With reference to the third aspect or one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the sending module is configured to:

sending the information of the first frequency resource to the terminal through a Physical Downlink Control Channel (PDCCH); alternatively, the first and second electrodes may be,

transmitting the information of the first frequency resource to the terminal through an Enhanced Physical Downlink Control Channel (EPDCCH); alternatively, the first and second electrodes may be,

transmitting information of the first frequency resource to the terminal through a broadcast channel; alternatively, the first and second electrodes may be,

and sending the information of the first frequency resource to the terminal through a Physical Downlink Shared Channel (PDSCH).

With reference to the third aspect or one of the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the allocating module is configured to:

dividing at least one frequency resource according to the transmission bandwidth configuration of the base station, wherein the bandwidth of the at least one frequency resource is less than or equal to the transmission bandwidth configuration of the terminal;

determining a first frequency resource to allocate to the terminal from the at least one frequency resource.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the sending module is configured to:

and sending the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource and receives a reference signal sent by the base station on the at least one frequency resource according to the first frequency resource.

With reference to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner of the third aspect, the sending module is configured to:

and sending the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives a reference signal sent by the base station on the at least one frequency resource by using the same reference signal sequence according to the first frequency resource.

With reference to the seventh or eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the sending module is configured to:

and sending the information of the first frequency resource and the reference signal information corresponding to the at least one frequency resource to the terminal.

With reference to one of the seventh to ninth possible implementation manners of the third aspect, in a tenth possible implementation manner of the third aspect, the sending module is further configured to:

determining that REs used by a cell-specific reference signal (CRS) are not included in Resource Elements (REs) used by an Enhanced Resource Element Group (EREG).

With reference to one of the first to tenth possible implementation manners of the third aspect, in an eleventh possible implementation manner of the third aspect, the sending module is further configured to:

and transmitting data on at least one subcarrier, wherein the subcarrier comprises a subcarrier corresponding to the reference frequency.

In a fourth aspect, a terminal is provided, which includes:

the information receiving module is used for receiving the information of the first frequency resource sent by the base station;

a determining module, configured to determine the first frequency resource according to the information of the first frequency resource;

and the data receiving module is used for receiving the data sent by the base station according to the first frequency resource.

In a first possible implementation manner of the fourth aspect, the information of the first frequency resource includes: reference frequency information of the first frequency resource;

the determining module is configured to:

and determining the reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determining the first frequency resource according to the reference frequency of the first frequency resource, the bandwidth of the first frequency resource and the relative position of the reference frequency of the first frequency resource in the first frequency resource.

In a second possible implementation manner of the fourth aspect, the information of the first frequency resource includes: reference frequency information of the first frequency resource and a bandwidth of the first frequency resource;

the determining module is configured to:

With reference to the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the reference frequency of the first frequency resource includes: a start frequency, or an intermediate frequency, or an end frequency.

With reference to one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the reference frequency information includes: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

With reference to the fourth aspect or one of the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the information receiving module is configured to:

receiving information of a first frequency resource sent by a base station through a Physical Downlink Control Channel (PDCCH); alternatively, the first and second electrodes may be,

receiving information of a first frequency resource sent by a base station through an Enhanced Physical Downlink Control Channel (EPDCCH); alternatively, the first and second electrodes may be,

receiving information of a first frequency resource sent by a base station through a broadcast channel; alternatively, the first and second electrodes may be,

and receiving information of the first frequency resource sent by the base station through a Physical Downlink Shared Channel (PDSCH).

With reference to the fourth aspect or one of the first to fifth possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the data receiving module is configured to:

and receiving the reference signal sent by the base station according to the first frequency resource.

With reference to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the information receiving module is configured to:

receiving information of a first frequency resource and reference signal information corresponding to at least one frequency resource sent by a base station, wherein the at least one frequency resource is divided by the base station according to transmission bandwidth configuration of the base station, and the bandwidth of the at least one frequency resource is less than or equal to the transmission bandwidth configuration of the terminal.

With reference to the sixth or seventh possible implementation manner of the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the data receiving module is further configured to:

and performing channel estimation, time domain or frequency domain synchronization or channel quality measurement according to the received reference signal and the reference signal information.

In a fifth aspect, a system for data transmission is provided, the system comprising the base station and the terminal as described above.

The technical scheme provided by the embodiment of the invention has the beneficial effects that:

in the embodiment of the invention, the base station allocates the frequency resource for the terminal in the transmission bandwidth configuration and sends the information of the frequency resource to the terminal, so that the terminal can receive the data sent by the base station according to the frequency resource. In this way, data transmission of the base station and the terminal can be performed on frequency resources not limited to the middle frequency resource position of the transmission bandwidth configuration thereof, and thus, the resource utilization rate of the wireless communication system can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flow chart of a method for data transmission according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for data transmission according to an embodiment of the present invention;

FIG. 3 is a flow chart of a method for data transmission according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example one

An embodiment of the present invention provides a method for data transmission, and as shown in fig. 1, a processing flow of the method at a base station side may include the following steps:

step 101, a base station allocates a first frequency resource for a terminal. The bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station.

The transmission bandwidth configuration of the terminal or the transmission bandwidth configuration of the base station is usually represented by N RBs, and it can be understood that 1RB may be a frequency bandwidth of 180KHz, which may be referred to in the prior art specifically and is not described herein again.

The first frequency resource may be a segment of frequency, for example, the first frequency resource is represented by 10MHz to 15MHz, and the bandwidth of the first frequency resource is 5 MHz. It should be noted that the above is only an example, and the present invention is not limited thereto.

And 102, the base station sends the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the frequency resource and receives data sent by the base station according to the first frequency resource.

As shown in fig. 2, the processing flow of the method at the terminal side may include the following steps:

step 201, the terminal receives information of the first frequency resource sent by the base station.

In step 202, the terminal determines the first frequency resource according to the information of the first frequency resource.

In step 203, the terminal receives data sent by the base station according to the first frequency resource.

Example two

An embodiment of the present invention provides a method for data transmission, where an execution main body of the processing flow shown in fig. 1 may preferably be a base station, and an execution main body of the processing flow shown in fig. 2 may be a terminal. The terminals in the method may preferably be narrowband terminals. The data transmission method provided by the embodiment of the present invention will be described in detail below by taking a narrowband terminal as an example and combining with a transmission process of a reference signal.

Reference Signal (RS) (also called pilot Signal) is generally used for channel estimation to obtain demodulation parameters, or for time domain and frequency domain synchronization, and channel quality measurement. The RS may be applied in a process that the base station and the terminal pre-define RS sequences (generated by pseudo-random sequences, each element in the sequences is a complex number) in different frequency resources (a plurality of RBs), the base station sends the RS sequences to the terminal, and the terminal compares the received RS sequences with the pre-defined RS sequences on each frequency resource and obtains corresponding parameters through calculation.

As shown in fig. 3, a processing flow of the data transmission method provided in the embodiment of the present invention may include the following steps:

step 301, the base station allocates a first frequency resource to the narrowband terminal. The bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the narrow-band terminal, and the transmission bandwidth configuration of the narrow-band terminal is less than the transmission bandwidth configuration of the base station. The first frequency resource allocated for the narrowband terminal may be referred to as a narrowband frequency resource (this name is adopted in some specifications of the present embodiment).

In this step, specifically, the base station may select a part of frequency resources in the transmission bandwidth configuration of the base station as the first frequency resources allocated to the narrowband terminal according to the allocation of the resources. A plurality of narrowband terminals may be scheduled on the first frequency resource. Furthermore, the bandwidth of the first frequency resource does not exceed the transmission bandwidth configuration of the narrowband terminal, so that the narrowband terminal can receive data transmitted on the whole first frequency resource, and the bandwidth of the first frequency resource may be equal to the transmission bandwidth configuration of the narrowband terminal, such as 6 RBs, that is, 1080 KHz.

In addition, preferably, the base station may divide at least one frequency resource according to its transmission bandwidth configuration, and the bandwidth of the at least one frequency resource is smaller than or equal to the transmission bandwidth configuration of the narrowband terminal. When performing step 301, the base station may determine that the first frequency resource is allocated to the narrowband terminal among the at least one frequency resource.

The bandwidth allocation of the base station may be configured to divide a plurality of frequency resources having the same bandwidth value as the bandwidth allocation of the narrowband terminal according to a bandwidth value (e.g., the number of RBs) of the transmission bandwidth allocation of the base station, and the greater the number of divided frequency resources is, the higher the utilization rate of the bandwidth resources is. For example, the transmission bandwidth of the base station is configured to be 66 RBs, the transmission bandwidth of the narrowband terminal is configured to be 6 RBs, the transmission bandwidth configuration of the base station may be divided into 11 frequency resources, and a plurality of narrowband terminals may be scheduled on each frequency resource. In performing this step, the base station may select one of the multiple frequency resources as a first frequency resource, and schedule the narrowband terminal within the selected first frequency resource.

Step 302, the base station sends the information of the first frequency resource to the narrowband terminal.

The information of the first frequency resource is used to determine a position of the frequency resource on the frequency domain, and specifically may be: a starting frequency location of the frequency resource and a bandwidth of the frequency resource; or, an end frequency position of the frequency resource and a bandwidth of the frequency resource; or, a starting frequency position of the frequency resource and an ending frequency position of the frequency resource; or, a middle frequency position of the frequency resource and a bandwidth of the frequency resource.

The starting Frequency position of the Frequency resource may be a starting Frequency point of the Frequency resource, or Absolute Radio Frequency Channel Number (ARFCN) information corresponding to the starting Frequency point, or a starting RB Number. The ending frequency position may be an ending frequency point of the narrowband frequency resource, or ARFCN information corresponding to the ending frequency point, or an RB number of the ending. The intermediate frequency position may be an intermediate frequency point of the narrowband frequency resource, or ARFCN information corresponding to the intermediate frequency point. Alternatively, for the case where the narrowband frequency resources are an odd number of RBs, the middle frequency position may be the number of middle RBs; for the case where the narrowband frequency resource is an even number of RBs, the intermediate frequency position may be the number of an odd numbered RB of the middle two RBs, or the intermediate frequency position may be the number of an even numbered RB of the middle two RBs. The ARFCN information may be the value of ARFCN or may be other information that can correspond to the value of ARFCN.

For the setting of the RB number described above, the following manner may be adopted: one is to number all RBs corresponding to the maximum number of RBs (110) in the system, and the other is to number RBs included in the transmission bandwidth configuration of the base station.

In addition, the base station and the narrowband terminal may pre-agree on the bandwidth of the allocated frequency resource, that is, the base station and the narrowband terminal respectively pre-store the bandwidth of the allocated frequency resource, and then the information of the frequency resource may be: a starting frequency location of the frequency resource; or, an end frequency location of the frequency resource; or, an intermediate frequency location of the frequency resource.

In addition, the information of the first frequency resource may also be reference frequency information of the first frequency resource, and the reference frequency information may be a frequency value of a reference frequency or ARFCN information corresponding to the reference frequency, and the like, wherein the reference frequency may be a frequency that is a frequency for determining a position of the first frequency resource on a frequency domain, and the reference frequency is within a range of the corresponding first frequency resource.

Accordingly, the processing of this step may be: the base station sends the reference frequency information of the first frequency resource to the narrowband terminal; or, the base station sends the reference frequency information of the first frequency resource and the bandwidth of the first frequency resource to the narrowband terminal. Accordingly, the narrowband terminal determines the reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determines the first frequency resource according to the reference frequency of the first frequency resource, the bandwidth of the first frequency resource (which may be pre-stored or transmitted by the base station) and the relative position of the reference frequency of the first frequency resource in the first frequency resource. For example, the bandwidth of the first frequency resource is 2MHz, the reference frequency is 15MHz, and the relative position of the reference frequency of the first frequency resource in the first frequency resource is the middle position of the reference frequency in the first frequency resource, then the first frequency resource can be determined to be 14-16 MHz.

For this case, the base station and the narrowband terminal may agree in advance on the relative position information of the reference frequency in the first frequency resource, that is, the narrowband terminal and the base station respectively store the relative position information of the reference frequency in the first frequency resource in advance. In addition, the base station and the narrowband terminal may also agree in advance on the bandwidth of the first frequency resource. The above-mentioned relative position information may be an RB in which the reference frequency is located in each RB of the first frequency resource and a subcarrier in which the reference frequency is located in the RB, and for example, the reference frequency may be agreed on the 2 nd subcarrier (counted from a low frequency) of the 2 nd RB of the 6 RBs of the narrowband frequency resource.

Preferably, the reference frequency of the first frequency resource may be a start frequency, an intermediate frequency, or an end frequency.

Optionally, the subcarriers corresponding to the reference frequency information may be used for data transmission (including data information or control information transmission).

Preferably, the reference frequency information may be ARFCN of the reference frequency.

In order to reduce the ARFCN transmission overhead, the ARFCNs may be grouped in advance according to the order of the corresponding frequencies, each group includes a preset number of ARFCNs, a group identifier is allocated to each group, an intra-group number is allocated to each ARFCN in the group according to the order of the corresponding frequencies, and the terminal and the base station store the group identifier and the intra-group number corresponding to each ARFCN. Based on this, the above ARFCN information may include a group identification and an intra-group number of the corresponding ARFCN. Therefore, the mode of sending the group identification and the intra-group number of the ARFCN is adopted to replace the mode of directly sending the ARFCN, the sending overhead of the ARFCN can be reduced, and the terminal can determine the corresponding frequency point according to the group identification and the intra-group number.

The reference frequency information may be a number of the ARFCN of the reference frequency in a band group to which the ARFCN of the reference frequency belongs, where the band group to which the ARFCN belongs is an ARFCN set having the same band divided according to the band to which the ARFCN belongs.

When the ARFCNs are grouped, each ARFCN may be divided into a plurality of groups according to the different frequency bands to which the ARFCN belongs, the corresponding ARFCNs in the same frequency band may be grouped into one group, the numbers in the frequency band group may be allocated to each of the plurality of ARFCNs belonging to the same frequency band (i.e., belonging to the same group), and the information of the frequency band to which the group identifier of the ARFCN belongs may be used. The base station and the terminal may pre-agree to store the correspondence between the ARFCN and the number in the frequency band and the frequency band packet to which the ARFCN belongs, so that the terminal may determine the corresponding reference frequency according to the number of the received ARFCN of the reference frequency in the frequency band packet to which the ARFCN of the reference frequency belongs and the frequency band to which the terminal currently belongs. The group identification here may correspond to frequency band information, which may be a starting carrier frequency value corresponding to all ARFCNs within the frequency band, i.e. a starting carrier frequency value of the frequency band, a number within a band grouping corresponding to a value of an ARFCN or a frequency offset value relative to the starting carrier frequency value. The number of bits (bits) used for numbering within a band packet may be the number of bits required for the group with the most ARFCNs among all groups (or bands).

In the above processing, only the identifier in the band packet of the ARFCN needs to be transmitted, instead of directly transmitting the ARFCN, so that the overhead of ARFCN transmission can be reduced. For example, 256 ARFCNs are defined in the system, so that 8 bits are required for transmitting the ARFCNs, if the 256 ARFCNs are divided into 8 groups of 32, the number in each band group is 32, and the number in the corresponding transmission group needs 5 bits, which saves 3 bits.

Specifically, the base station may send the information of the first frequency resource to the narrowband terminal through a Physical Downlink Control Channel (PDCCH); or, the information of the first frequency resource may be sent to the narrowband terminal through an Enhanced Physical Downlink Control Channel (EPDCCH), and the information may be specifically sent on the PDCCH and the EPDCCH through a Downlink Control Information (DCI) message; or, the Information of the first frequency resource may be sent to the narrowband terminal through a broadcast channel, and the Information may be specifically sent through a Master Information Block (MIB) message on the broadcast channel; alternatively, the information of the first frequency resource may be sent to the narrowband terminal through a Physical Downlink Shared Channel (PDSCH), and the information of the first frequency resource may be sent to the narrowband terminal on the PDSCH specifically through a Radio Resource Control (RRC) message or a Media Access Control (MAC CE) message.

Step 303, the narrowband terminal receives the information of the first frequency resource sent by the base station. Specifically, the narrowband terminal may receive information of the first frequency resource transmitted by the base station through a PDCCH, an EPDCCH, a PDSCH, or a broadcast channel.

And step 304, the narrowband terminal determines the first frequency resource according to the information of the first frequency resource.

Further, the narrowband terminal may set, as the first frequency resource, a frequency resource corresponding to the transmission bandwidth configuration of the narrowband terminal according to the information of the first frequency resource. Specifically, the carrier frequency of the channel bandwidth corresponding to the transmission bandwidth configuration of the mobile terminal may be set as the carrier frequency of the channel bandwidth corresponding to the first frequency resource. The transmission bandwidth configuration of the narrowband terminal is the frequency range in which the narrowband terminal baseband can currently perform effective data transmission.

Specifically, if the information of the first frequency resource includes reference frequency information of the first frequency resource, the terminal may determine a reference frequency of the first frequency resource according to the reference frequency information of the first frequency resource, and determine the first frequency resource according to a relative position of a bandwidth of the first frequency resource (the bandwidth of the first frequency resource may be included in the information of the first frequency resource or may be stored in the terminal in advance) and the reference frequency of the first frequency resource in the first frequency resource. For example, the bandwidth of the first frequency resource is 2MHz, the reference frequency is 15MHz, and the relative position of the reference frequency of the first frequency resource in the first frequency resource is the middle position of the reference frequency in the first frequency resource, then the first frequency resource can be determined to be 14-16 MHz.

Specifically, if the information of the first frequency resource includes an RB number (e.g., a starting RB number, an ending RB number, a middle RB number, etc.), the terminal may obtain a frequency range of the current system carrier, and determine a corresponding frequency point (a starting frequency point, an ending frequency point, or a middle frequency point) of the first frequency resource according to the frequency range of the system carrier and the information of the first frequency resource including the RB number.

Specifically, if the information of the first frequency resource includes a frequency point (such as a start frequency point, an end frequency point, an intermediate frequency point, and the like), the frequency resource configured for the transmission bandwidth of the narrowband terminal or the carrier frequency of the channel bandwidth may be set according to the frequency point, and the bandwidth of the first frequency resource included in the information of the first frequency resource or the bandwidth of the first frequency resource agreed in advance may be used during the setting.

Specifically, if the information of the first frequency resource includes ARFCN information corresponding to a frequency point (e.g., a start frequency point, an end frequency point, an intermediate frequency point, etc.), the corresponding frequency point may be determined according to the ARFCN information, and then, the frequency resource configured for the transmission bandwidth of the narrowband terminal or the carrier frequency of the channel bandwidth may be set according to the frequency point, and the bandwidth of the first frequency resource included in the information of the first frequency resource or the bandwidth of the first frequency resource agreed in advance may be used during the setting.

In step 305, the base station transmits data. The data transmitted by the base station may include control information and data information.

Specifically, when the base station performs resource allocation for the terminal before transmitting data configured for the entire transmission bandwidth, it may allocate a time-frequency resource to the narrowband terminal in the first frequency resource, and then allocate the data transmitted to the narrowband terminal to a corresponding time-frequency position. The base station may indicate the narrowband terminal through the indication information on a control channel in the first frequency resource, and send data of the narrowband terminal to a specific time-frequency position in the first frequency resource.

In the case where the information on the first frequency resource is reference frequency information on the first frequency resource, the processing of the base station for data transmission may be: the base station transmits data on at least one subcarrier, the at least one subcarrier including a subcarrier corresponding to a reference frequency.

And step 306, the narrowband terminal receives the data sent by the base station according to the first frequency resource.

The narrowband terminal may determine the first frequency resource according to the information of the first frequency resource and receive data transmitted by the base station according to the first frequency resource.

Specifically, the narrowband terminal may receive data on the entire first frequency resource allocated to the narrowband terminal, read the indication information sent by the base station, obtain the time-frequency position indicated in the indication information, and select data on the corresponding time-frequency position from the received data.

In step 305 and step 306, optionally, the base station may send a reference signal, and the narrowband terminal may determine the first frequency resource according to the information of the first frequency resource and receive the reference signal sent by the base station according to the first frequency resource. That is, the reference signal transmitted by the base station is received on the first frequency resource, and further, the processing such as channel estimation, time domain or frequency domain synchronization, or channel quality measurement may be performed. Specifically, the base station may transmit the reference signal on at least one frequency resource. The narrowband terminal may determine the first frequency resource according to the information of the first frequency resource and receive a reference signal transmitted by the base station on at least one frequency resource according to the first frequency resource.

The reference signal may be a conventional defined reference signal, such as a cell specific reference signal (CRS), a Channel state information-reference signal (CSI-RS), a Reduced CRS (RCRS), or a Demodulation reference signal (DMRS). The CRS, the CSI-RS and the RCRS are all reference signals sent by the base station in full transmission bandwidth configuration, the base station sends the reference signals in full transmission bandwidth configuration, and the narrowband terminal can receive the reference signals on narrowband frequency resources.

In addition, the reference signal may also be a newly defined reference signal, which may be a reference signal at a different time-frequency location than a legacy defined reference signal. For the case that the base station divides at least one frequency resource according to its transmission bandwidth configuration, the base station may transmit a reference signal on the at least one frequency resource. The at least one frequency resource includes the first frequency resource allocated to the narrowband terminal.

Such a reference signal transmitted only on a part of frequency resources in the transmission bandwidth configuration of the base station may be referred to as a narrowband reference signal, as opposed to a conventional wideband reference signal (a reference signal transmitted in the full transmission bandwidth configuration of the base station).

Preferably, each of the at least one divided frequency resource may be allocated to a different narrowband terminal as a first frequency resource. Therefore, on the frequency resource which does not allocate the first frequency resource for the narrowband terminal, the reference signal of the narrowband is not sent, and the utilization rate of the system resource can be improved.

For the above-mentioned narrowband reference signal, the time-frequency position in the subframe may use the time-frequency position of the corresponding conventional reference signal, for example, the narrowband CRS may use the time-frequency position of the conventional CRS in the subframe, and of course, the newly defined time-frequency position of the reference signal may also be used. If the narrowband reference signal and the corresponding legacy reference signal (wideband reference signal) are to be transmitted simultaneously, they may be transmitted at the same time-frequency location in a code division multiplexing manner.

The sequence of the narrowband reference signal used in each frequency band may be a sequence of a conventional reference signal in the corresponding frequency band, for example, a sequence of a narrowband CRS transmitted at a certain time-frequency position, and a sequence of a conventional CRS transmitted at the time-frequency position may be used. Of course, instead of multiplexing the sequence of the legacy reference signal, a new reference signal may be configured or a new sequence may be configured for the reference signal. For example, for a conventional CRS, the base station and the terminal generally have a CRS sequence corresponding to 110 RBs in advance, and according to the transmission bandwidth configuration of the base station, the CRS sequence of several RBs among the 110 RBs may be taken to be transmitted, and if the transmission bandwidth configuration of the base station is 50 RBs, the CRS sequence corresponding to 50 RBs among the 110 RBs is taken as the CRS sequence transmitted on the transmission bandwidth configuration of the base station.

Preferably, the base station may transmit the reference signal on the at least one frequency resource using the same reference signal sequence, and accordingly, the terminal may determine the first frequency resource according to the information of the first frequency resource and receive the reference signal transmitted on the at least one frequency resource by the base station using the same reference signal sequence according to the first frequency resource.

In the case where the number of the divided frequency resources is plural, when the base station transmits the reference signal, the same reference signal sequence may be used for each frequency resource. Preferably, when configuring the newly defined narrowband CRS sequence, for each divided frequency resource, the CRS sequences of several RBs among 110 RBs may be selected for transmission according to the bandwidth of each frequency resource, for example, the transmission bandwidth of the base station is configured as 50 RBs, and the bandwidth of each divided frequency resource is 6 RBs, then the CRS sequences corresponding to 6 RBs among 110 RBs may be selected for each frequency resource and transmitted on each divided frequency resource, respectively, or the CRS sequences may be determined according to the corresponding frequency resource position of each frequency resource in 50 RBs or 110 RBs.

In the embodiment of the present invention, when the reference signal is sent, a Resource Element (RE) used by an Enhanced Resource Element Group (EREG) may also be set, and the following setting may be adopted according to specific requirements:

the base station determines that REs used by CRS are not included in REs used by EREG (EPDCCH is mapped to a plurality of EREGs for transmission). Both the CRS and DMRS may be used as channel estimation, based on the above mentioned EREG setting, the base station may not transmit DMRS, and the terminal may perform channel estimation based on the CRS to complete channel demodulation. Therefore, resources occupied by transmitting the DMRS can be saved, and the resource utilization rate is improved.

Or, the base station determines that the REs used by the CRS and the REs used by the DMRS are not included in the REs used by the EREG. Therefore, the CRS and the DMRS can be transmitted simultaneously, channel estimation is carried out based on the CRS and the DMRS, and the accuracy of channel estimation can be improved under the condition of poor channel quality.

In the embodiment of the present invention, the type of the reference signal used by the terminal for demodulation may be configured: and performing channel demodulation by using the CRS, or performing channel demodulation by using the DMRS, or performing channel demodulation by using the CRS and the DMRS simultaneously. The transmission subframe of the reference signal may be configured or predefined through signaling, and the transmission subframe of the narrowband RS may include a subframe for transmitting the RCRS, or the transmission subframe of the narrowband RS may include a subframe for transmitting the MIB or the SIB.

In the embodiment of the present invention, reference signal information (reference signal type, RS index, etc.) of a narrowband terminal may be notified by a base station in a manner of sending a message to a terminal, so that the narrowband terminal stores the reference signal information, and then the narrowband terminal may perform subsequent processing according to the reference signal information and a received reference signal, where the specific process may be as follows:

firstly, the base station sends the information of the first frequency resource and the reference signal information corresponding to the at least one divided frequency resource to the narrowband terminal. Correspondingly, the narrowband terminal receives the information of the first frequency resource sent by the base station and the reference signal information corresponding to the at least one frequency resource. For example, the base station may notify the narrowband terminal of reference signal information corresponding to at least one frequency resource through a synchronization channel or a broadcast channel, and the corresponding terminal may acquire the reference signal information on the synchronization channel or the broadcast channel.

Preferably, the Transmission operation may be performed when the narrowband terminal accesses the base station, or may be performed by a target base station for handover when the base station handover is performed in a Coordinated Multipoint Transmission (CoMP) scenario.

Specifically, the base station may transmit the reference signal information by transmitting an indication message to the narrowband terminal. The RS information carried in the indication message may include an RS index, the narrowband terminal stores preset RSs corresponding to different RS indexes, and the corresponding preset RSs may be determined by the RS index. The RS information may further include several information of RS type (which may be a combination of one type or multiple types), identification of narrowband frequency resources, carrier identification, number of RS antenna ports, RS scrambling identification, RS frequency domain offset, and the like. The indication message may be an RRC message or a DCI message, etc.

Then, the base station transmits a reference signal. Correspondingly, the narrowband terminal performs channel estimation, time domain and frequency domain synchronization or channel quality measurement according to the received reference signal and the reference signal information.

EXAMPLE III

Based on the same technical concept, an embodiment of the present invention further provides a base station, as shown in fig. 4, where the base station includes:

an allocating module 410, configured to allocate a first frequency resource to a terminal, where a bandwidth of the first frequency resource is less than or equal to a transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than a transmission bandwidth configuration of the base station;

a sending module 420, configured to send the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives data sent by the base station according to the first frequency resource.

Preferably, the sending module 420 is configured to:

Preferably, the reference frequency of the first frequency resource includes: a start frequency, or an intermediate frequency, or an end frequency.

Preferably, the reference frequency information includes: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

Preferably, the sending module 420 is configured to:

Preferably, the allocating module 410 is configured to:

Preferably, the sending module 420 is configured to:

Preferably, the sending module 420 is further configured to:

Based on the same technical concept, an embodiment of the present invention further provides a terminal, as shown in fig. 5, where the terminal includes:

an information receiving module 510, configured to receive information of a first frequency resource sent by a base station;

a determining module 520, configured to determine the first frequency resource according to the information of the first frequency resource;

a data receiving module 530, configured to receive data sent by the base station according to the first frequency resource.

Preferably, the information of the first frequency resource includes: reference frequency information of the first frequency resource;

the determining module 520 is configured to:

Preferably, the information of the first frequency resource includes: reference frequency information of the first frequency resource and a bandwidth of the first frequency resource;

the determining module 520 is configured to:

Preferably, the information receiving module 510 is configured to:

Preferably, the data receiving module 530 is configured to:

Preferably, the information receiving module 510 is configured to:

Preferably, the data receiving module 530 is further configured to:

Example four

Based on the same technical concept, the embodiment of the invention also provides a data transmission system, which comprises the base station and the terminal.

EXAMPLE five

The embodiment of the invention provides a base station. The base station may include a transmitter, a receiver, a memory, and a processor coupled to the transmitter, the receiver, and the memory, respectively. In addition, the base station may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, which is not limited in this embodiment of the present invention.

Wherein the memory stores a set of program codes and the processor is configured to call the program codes stored in the memory for performing any of the above method embodiments, for example, performing the following operations:

Preferably, the sending, by the base station, the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, includes:

Preferably, the sending, by the base station, the information of the first frequency resource to the terminal includes:

Preferably, the sending, by the base station, the information of the first frequency resource to the terminal specifically includes:

Preferably, the base station allocates the first frequency resource to the terminal, including:

Preferably, the sending, by the base station, the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives data sent by the base station according to the first frequency resource, includes:

Preferably, the sending, by the base station, the information of the first frequency resource to the terminal, so that the terminal determines the first frequency resource according to the information of the first frequency resource, and receives, according to the first frequency resource, a reference signal sent by the base station on the at least one frequency resource, includes:

Preferably, the method further comprises:

Preferably, after the base station sends the information of the first frequency resource to the terminal, the method further includes:

The embodiment of the invention provides a terminal. The terminal may include a transmitter, a receiver, a memory, and a processor coupled to the transmitter, the receiver, and the memory, respectively. In addition, the terminal may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, which is not limited in this embodiment of the present invention.

Preferably, the receiving, by the terminal, the information of the first frequency resource sent by the base station specifically includes:

Preferably, the receiving, by the terminal, data sent by the base station according to the first frequency resource includes:

Preferably, the receiving, by the terminal, information of the first frequency resource sent by the base station includes:

Preferably, the method further comprises:

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

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

the base station divides a plurality of first frequency resources according to the transmission bandwidth configuration of the base station, and the bandwidth of each first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal;

the base station respectively allocates the plurality of first frequency resources to different terminals, wherein each first frequency resource is used for the base station to send data or reference signals to the corresponding terminal, the bandwidth of each first frequency resource is less than or equal to the transmission bandwidth configuration of the corresponding terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station;

the base station sends the information of each first frequency resource to the corresponding terminal through a Physical Downlink Shared Channel (PDSCH), so that the corresponding terminal determines the first frequency resource according to the information of the first frequency resource and receives data or reference signals sent by the base station according to the first frequency resource.

2. The method of claim 1, wherein the base station sends the information of the first frequency resource to the terminal, and wherein the sending comprises:

and the base station sends the reference frequency information of the first frequency resource to the terminal.

3. The method of claim 1, wherein the base station sends the information of the first frequency resource to the terminal, and wherein the sending comprises:

4. The method of claim 2 or 3, wherein the reference frequency of the first frequency resource comprises: a start frequency, or an intermediate frequency, or an end frequency.

5. The method according to claim 2 or 3, wherein the reference frequency information comprises: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

6. The method of claim 1, wherein the base station sends the information of the first frequency resource to the terminal, and wherein the sending comprises:

the base station sends the information of the first frequency resource to the terminal;

and the base station transmits the reference signal to the terminal by using the same reference signal sequence on the plurality of first frequency resources.

7. The method of claim 1, wherein the base station sends the information of the first frequency resource to the terminal, and wherein the sending comprises:

and the base station sends the information of the first frequency resources and the reference signal information corresponding to the plurality of first frequency resources to the terminal.

8. The method according to any one of claims 1, 6 and 7, further comprising:

9. The method according to claim 2 or 3, wherein after the base station transmits the information of the first frequency resource to the terminal, the method further comprises:

and the base station sends data on at least one subcarrier, wherein the subcarrier comprises a subcarrier corresponding to the reference frequency of the first frequency resource.

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

a terminal receives information of a first frequency resource sent by a base station through a Physical Downlink Shared Channel (PDSCH); wherein the first frequency resource is a first frequency resource determined by the base station to be allocated to the terminal from a plurality of first frequency resources, the bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station; the plurality of first frequency resources are frequency resources obtained by the base station according to the transmission bandwidth configuration of the base station and are used for being allocated to different terminals, and the bandwidth of the first frequency resources is smaller than or equal to the transmission bandwidth configuration of the terminals;

and the terminal receives the data or the reference signal sent by the base station according to the first frequency resource.

11. The method of claim 10, wherein the information of the first frequency resource comprises: reference frequency information of the first frequency resource;

12. The method of claim 10, wherein the information of the first frequency resource comprises: reference frequency information of the first frequency resource and a bandwidth of the first frequency resource;

13. The method according to claim 11 or 12, wherein the reference frequency of the first frequency resource comprises: a start frequency, or an intermediate frequency, or an end frequency.

14. The method according to claim 11 or 12, wherein the reference frequency information comprises: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

15. The method of claim 10, wherein the receiving, by the terminal, the information of the first frequency resource sent by the base station comprises:

16. The method according to claim 10 or 15, characterized in that the method further comprises:

17. A base station, characterized in that the base station comprises:

the allocation module is used for dividing a plurality of first frequency resources according to the transmission bandwidth configuration of the base station, wherein the bandwidth of each first frequency resource is less than or equal to the transmission bandwidth configuration of a terminal; allocating the plurality of first frequency resources to different terminals respectively, wherein each first frequency resource is used for the base station to send data or reference signals to a corresponding terminal, the bandwidth of each first frequency resource is less than or equal to the transmission bandwidth configuration of the corresponding terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station;

and a sending module, configured to send, by the base station, information of each first frequency resource to the corresponding terminal through a physical downlink shared channel PDSCH.

18. The base station of claim 17, wherein the sending module is configured to:

and sending the reference frequency information of the first frequency resource to the terminal.

19. The base station of claim 17, wherein the sending module is configured to:

20. The base station according to claim 18 or 19, wherein the reference frequency of the first frequency resource comprises: a start frequency, or an intermediate frequency, or an end frequency.

21. The base station according to claim 18 or 19, wherein the reference frequency information comprises: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

22. The base station of claim 17, wherein the sending module is configured to:

sending the information of the first frequency resource to the terminal;

transmitting a reference signal to the terminal using the same reference signal sequence on the plurality of first frequency resources.

23. The base station of claim 17, wherein the sending module is configured to:

and sending the information of the first frequency resources and the reference signal information corresponding to the plurality of first frequency resources to the terminal.

24. The base station of any one of claims 17, 22 and 23, wherein the sending module is further configured to:

25. The base station of claim 18 or 19, wherein the sending module is further configured to:

and transmitting data on at least one subcarrier, wherein the subcarrier comprises a subcarrier corresponding to the reference frequency of the first frequency resource.

26. A terminal, characterized in that the terminal comprises:

the information receiving module is used for receiving information of a first frequency resource sent by a base station through a Physical Downlink Shared Channel (PDSCH); wherein the first frequency resource is a first frequency resource determined by the base station to be allocated to the terminal from a plurality of first frequency resources, the bandwidth of the first frequency resource is less than or equal to the transmission bandwidth configuration of the terminal, and the transmission bandwidth configuration of the terminal is less than the transmission bandwidth configuration of the base station; the plurality of first frequency resources are frequency resources obtained by the base station according to the transmission bandwidth configuration of the base station and are used for being allocated to different terminals, and the bandwidth of the first frequency resources is smaller than or equal to the transmission bandwidth configuration of the terminals;

a determining module, configured to determine, by the terminal, the first frequency resource according to the information of the first frequency resource;

a data receiving module, configured to receive data or a reference signal sent by the base station according to the first frequency resource, where the reference signal includes a defined reference signal or a newly defined reference signal, the defined reference signal includes a cell-specific reference signal, a channel state information reference signal, a reduced reference signal, or a demodulation reference signal, and the newly defined reference signal is a reference signal located at a different time-frequency position from the defined reference signal.

27. The terminal of claim 26, wherein the information of the first frequency resource comprises: reference frequency information of the first frequency resource;

the determining module is configured to:

28. The terminal of claim 26, wherein the information of the first frequency resource comprises: reference frequency information of the first frequency resource and a bandwidth of the first frequency resource;

the determining module is configured to:

29. The terminal according to claim 27 or 28, wherein the reference frequency of the first frequency resource comprises: a start frequency, or an intermediate frequency, or an end frequency.

30. The terminal according to claim 27 or 28, wherein the reference frequency information comprises: an ARFCN of the reference frequency; or the ARFCN of the reference frequency is the number in the band packet to which the ARFCN of the reference frequency belongs, wherein the band packet to which the ARFCN belongs is the ARFCN set with the same frequency band obtained by dividing the frequency band to which the ARFCN belongs.

31. The terminal of claim 26, wherein the information receiving module is configured to:

32. The terminal according to claim 26 or 31, wherein the data receiving module is further configured to:

33. A system for data transmission, characterized in that the system comprises a base station according to any of claims 17 to 25 and a terminal according to any of claims 26 to 32.