CN106961734B

CN106961734B - Information transmission method and device

Info

Publication number: CN106961734B
Application number: CN201610017055.2A
Authority: CN
Inventors: 张雯; 夏树强; 戴博; 石靖; 刘锟; 陈宪明; 方惠英; 袁弋非
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-01-11
Filing date: 2016-01-11
Publication date: 2023-05-30
Anticipated expiration: 2036-01-11
Also published as: CN106961734A; WO2017121289A1

Abstract

The invention provides a method and a device for transmitting information, wherein the method comprises the following steps: the network device determines frequency offset information or frequency domain location information, determines a narrowband for transmitting information according to the frequency offset information or the frequency domain location information, and transmits information on the narrowband. By the technical scheme, the problem of how to determine the narrow band of the transmission channel on the bandwidth of the LTE system is solved, and the narrow band of the transmission channel is determined.

Description

Information transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting information.

Background

Machine-type communication (Machine Type Communication, abbreviated as MTC) User Equipment (UE), also known as machine-to-machine (Machine to Machine, abbreviated as M2M) User Equipment, is currently the main application form of the internet of things. Several technologies suitable for cellular-level internet of things (Comb-Internet Of Things, C-IOT) are disclosed in the third generation partnership project (3 rd Generation Partnership Project, 3 GPP) technical report TR45.820V200, with narrowband long term evolution (Narrow Band-Internet of Things, NB-IOT) technology being the most attractive. The system bandwidth of the system is 200kHz, which is the same as the channel bandwidth of the global system for mobile communications (Global system for Mobile Communication, abbreviated as GSM) GSM system, which brings great convenience for the NB-IoT system to reuse the GSM spectrum and reduce mutual interference between neighboring and GSM channels. There are three operating scenarios for NB-IoT, independently operating "stand alone", transmitting "guard band" on a guard band, and transmitting "in band" on one PRB in LTE.

For the related art, on the bandwidth of the LTE system, how to determine the narrowband of the transmission channel, no effective solution exists at present.

Disclosure of Invention

The invention provides a method and a device for transmitting information, which at least solve the problem of how to determine the narrow band of a transmission channel on the bandwidth of an LTE system in the related technology.

According to an aspect of the present invention, there is provided a transmission method of information, including:

the network equipment determines frequency offset information or frequency domain position information;

and determining a narrow band for transmitting information according to the frequency offset information or the frequency domain position information, and transmitting information on the narrow band.

Further, the network device determining the frequency offset information includes one of:

determining the frequency domain offset information according to predefined information;

and receiving notification information of the network equipment to determine the frequency offset information.

Further, the frequency offset information includes one of:

the frequency offset information carried in the master system information block MIB, wherein the frequency offset information indicates a frequency offset of a first narrowband and a second narrowband, and the first narrowband is a narrowband transmitting at least one of the following: system information block SIB, RAR, paging message, downlink control channel and PDSCH, the second narrowband being a narrowband transmitting at least one of: primary synchronization signal PSS, secondary synchronization signal SSS, and physical broadcast channel PBCH;

The frequency offset information carried in SIB, wherein the frequency offset information indicates a frequency offset of a third narrowband and a fourth narrowband, and the third narrowband is a narrowband transmitting at least one of the following: a random access response RAR, a paging message, a downlink control channel and a physical downlink shared channel PDSCH, wherein the fourth narrowband is a narrowband for transmitting at least one of the following: PSS, SSS, PBCH and SIBs;

the frequency offset information carried in SIBx, wherein the frequency offset information indicates a frequency offset between a fifth narrowband and a sixth narrowband, and the fifth narrowband is a narrowband transmitting at least one of the following: RAR, paging message, downlink control channel and PDSCH, SIB other than SIBx, the sixth narrowband being a narrowband transmitting at least one of: PSS, SSS, PBCH and SIBx, wherein the SIBx is a specified SIB message;

the frequency offset information carried in the primary synchronization signal PSS and the secondary synchronization signal SSS, wherein the frequency offset information indicates a frequency offset of a seventh narrowband and an eighth narrowband, wherein the seventh narrowband is a narrowband transmitting at least one of: PBCH, SIB, RAR, paging message, downlink control channel and PDSCH, the eighth narrowband being a narrowband transmitting at least one of: PSS and SSS.

Further, the first narrowband, the third narrowband, the fifth narrowband, and the seventh narrowband are one physical resource block PRB in a long-term evolution LTE system.

Further, the center frequency points of the center subcarriers of the second narrowband, the fourth narrowband, the sixth narrowband, and the eighth narrowband satisfy integer multiples of 100 KHz.

Further, the frequency offset information indicates the number of offset subcarriers.

Further, the absolute value of the frequency offset X indicated by the frequency offset information is less than or equal to Y subcarriers, X is an integer, and Y is a preset positive integer.

Further, X is an integer between-5 and 6, or an integer between-6 and 5, or an integer between 0 and 11.

Further, the frequency offset information includes:

the frequency offset information carried in the MIB or SIB is an offset between a specified narrowband and a preset frequency, where the specified narrowband is a narrowband transmitting at least one of the following: PSS, SSS, PBCH, SIB, RAR, paging message, downlink control channel and PDSCH.

Further, the preset frequency is an integer multiple of 100 KHz.

Further, the specified narrowband is one PRB in the LTE system.

Further, the frequency offset information indicates that the frequency offset is an integer multiple or an odd multiple of 2.5 KHz; the frequency offset information is a frequency offset corresponding to an index in a predefined set.

Further, in the case that the narrowband is an uplink narrowband, the frequency offset information is one of:

the frequency offset between the center frequency points of the uplink narrow band and the uplink system bandwidth;

a frequency offset between the upstream narrowband and an integer multiple of 100 KHz;

the frequency offset between the uplink narrow band and a designated frequency point, wherein the designated frequency point is determined by a default UE transmitting-receiving frequency interval;

further, when the narrowband is an uplink narrowband, the frequency domain location information is a PRB index corresponding to the uplink narrowband.

Further, the predefined information or notification information includes at least one of:

a system bandwidth;

PRB information corresponding to the uplink narrowband;

PRB information corresponding to the downlink narrowband;

offset of Direct Current (DC) subcarriers of downlink narrow band and system bandwidth;

the difference between the PRB index corresponding to the uplink narrow band and the PRB index corresponding to the downlink narrow band;

the first value is a frequency offset value between the uplink narrow band and the central frequency point of the uplink system bandwidth, and the second value is a frequency offset value between the downlink narrow band and the central frequency point of the downlink system bandwidth.

Further, in the case that the narrowband is an uplink narrowband, a center frequency point of the uplink narrowband is:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.015n _UL ；

or alternatively, the process may be performed,

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09n _UL ；

wherein F is _UL Is the center frequency point of the uplink narrow band, F _{UL_LOW} For the lowest frequency, N, of the operating frequency band in which the uplink narrowband is located _UL Is the uplink carrier frequency corresponding to the system bandwidth, N _Offs-UL N is the offset value corresponding to the working frequency band where the uplink narrow band is located _UL For the frequency offset value, n _UL Is an integer of F _UL 、F _{UL_LOW} 、N _UL And N _Offs-UL The units are MHz.

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.01n _UL

wherein F is _UL Is the center frequency point of the uplink narrow band, F _{UL_LOW} For the lowest frequency, N, of the operating frequency band in which the uplink narrowband is located _UL Is the uplink carrier frequency corresponding to the uplink narrow band, N _Offs-UL N is an offset value corresponding to the working frequency band where the uplink narrow band is located _UL For the frequency offset value, n _UL Is an integer of F _UL 、F _{UL_LOW} 、N _UL And N _Offs-UL The units are MHz.

Further, n _UL ∈{-4,-3,-2,-1,0,1,2,3,4,5}，

Alternatively, n _UL ∈{-5,-4,-3,-2,-1,0,1,2,3,4}

Alternatively, n _UL ∈{0,1,2,3,4,5,6,7,8,9}。

F _UL ＝F _DL -Δf+0.015n _UL ；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL ；

wherein F is _UL Is the center frequency point of the uplink narrow band, F _DL For the frequency of the center frequency point or the center subcarrier of the downlink narrowband, Δf is the default UE transmit-receive frequency interval, F _UL And F _DL The units are MHz and n _UL For the frequency offset value, n _UL Is an integer.

Further, the center frequency point of the uplink narrowband is:

F _UL ＝F _DL ′-Δf+0.09n _UL ；

wherein F is _UL Is the center frequency point of the uplink narrow band, F _DL ' is the center frequency point of the downlink system bandwidth, Δf is the default UE transmit-receive frequency interval, F _UL And F _DL ' units are MHz, n _UL For the frequency offset value, n _UL Is an integer.

Further, the center frequency point of the uplink narrowband is:

F _UL ＝F _DL -Δf+0.015n _UL +x·0.0075；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL +x·0.0075；

wherein F is _UL Is the center frequency point of the uplink narrow band, F _DL For the frequency of the center frequency point or the center subcarrier of the downlink narrowband, Δf is the default UE transmit-receive frequency interval, F _UL And F _DL The units are MHz and n _UL For the frequency offset value, n _UL X is an integer, either 1 or-1, x being either predefined or indicated by higher layer signaling.

Further, in the case that the narrowband is a downlink narrowband, a center frequency point of the downlink narrowband is:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.3n _DL ；

or alternatively, the process may be performed,

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.2n _DL ；

wherein F is _DL F, the frequency of the central frequency point or the central subcarrier of the downlink narrow band _{DL_LOW} For the lowest frequency, N, of the operating frequency band in which the downlink narrowband is located _DL For the downlink carrier frequency corresponding to the system bandwidth, N _Offs-DL N is an offset value corresponding to the working frequency band where the downlink narrow band is located _DL For the frequency offset value, n _DL Is an integer of F _DL 、F _{DL_LOW} 、N _DL And N _Offs-DL The units are MHz.

According to another aspect of the present invention, there is also provided an information transmission apparatus, located in a network device, including:

the network equipment is used for determining frequency offset information or frequency domain position information;

and the transmission module is used for determining a narrow band for transmitting information according to the frequency offset information or the frequency domain position information, and transmitting information on the narrow band.

Further, the determination module includes one of:

the self-defining unit is used for determining the frequency domain offset information according to the predefined information;

and the receiving unit is used for receiving the notification information of the network equipment and determining the frequency offset information.

According to the invention, the network equipment determines the frequency offset information or the frequency domain position information, determines the narrow band of the transmission information according to the frequency offset information or the frequency domain position information, and transmits the information on the narrow band, so that the problem of how to determine the narrow band of the transmission channel on the bandwidth of the LTE system is solved, and the narrow band of the transmission channel is determined.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

Fig. 1 is a flowchart of a method of transmitting information according to an embodiment of the present invention;

fig. 2 is a block diagram of an information transmission apparatus according to an embodiment of the present invention;

fig. 3 is a block diagram of a second configuration of an information transmission apparatus according to an embodiment of the present invention;

fig. 4 is a diagram illustrating frequency offset information in a system bandwidth according to a preferred embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a method for transmitting information is provided, fig. 1 is a flowchart of a method for transmitting information according to an embodiment of the present invention, and as shown in fig. 1, the flowchart includes the following steps:

step S102, the network equipment determines frequency offset information or frequency domain position information;

step S104, determining a narrow band of the transmission information according to the frequency offset information or the frequency domain position information, and transmitting the information on the narrow band.

Through the steps, the network equipment determines the frequency offset information or the frequency domain position information, determines the narrow band of the transmission information according to the frequency offset information or the frequency domain position information, and transmits the information on the narrow band, so that the problem of how to determine the narrow band of the transmission channel on the bandwidth of the LTE system is solved, and the narrow band of the transmission channel is determined.

In an embodiment of the invention, the network device determining the frequency offset information comprises one of:

the notification information of the network device is received to determine the frequency offset information.

In an embodiment of the invention, the frequency offset information comprises one of:

the frequency offset information carried in the master system information block MIB, wherein the frequency offset information indicates a frequency offset of a first narrowband and a second narrowband, the first narrowband being a narrowband transmitting at least one of: system information blocks SIB, RAR, paging message, downlink control channel and PDSCH, the second narrowband being a narrowband transmitting at least one of: primary synchronization signal PSS, secondary synchronization signal SSS, and physical broadcast channel PBCH;

the frequency offset information carried in the SIB, wherein the frequency offset information indicates a frequency offset of a third narrowband and a fourth narrowband, wherein the third narrowband is a narrowband transmitting at least one of: random access response, RAR, paging message, downlink control channel, and physical downlink shared channel, PDSCH, the fourth narrowband being a narrowband transmitting at least one of: PSS, SSS, PBCH and SIBs;

The frequency offset information carried in SIBx, wherein the frequency offset information indicates a frequency offset of a fifth narrowband and a sixth narrowband, wherein the fifth narrowband is a narrowband transmitting at least one of: RAR, paging message, downlink control channel and PDSCH, SIB other than SIBx, the sixth narrowband being a narrowband transmitting at least one of: PSS, SSS, PBCH, and SIBx, wherein the SIBx is a specified SIB message;

the frequency offset information carried in the primary synchronization signal PSS and the secondary synchronization signal SSS, wherein the frequency offset information indicates a frequency offset of a seventh narrowband from an eighth narrowband, wherein the seventh narrowband is a narrowband transmitting at least one of: PBCH, SIB, RAR, paging message, downlink control channel and PDSCH, the eighth narrowband being a narrowband transmitting at least one of: PSS and SSS.

In an embodiment of the present invention, the first narrowband, the third narrowband, the fifth narrowband, and the seventh narrowband are one physical resource block PRB in a long-term evolution LTE system.

In an embodiment of the present invention, the center frequency point of the center subcarrier of the second narrowband, the fourth narrowband, the sixth narrowband, and the eighth narrowband satisfies an integer multiple of 100 KHz.

In an embodiment of the present invention, the frequency offset information indicates the number of offset subcarriers.

In an embodiment of the present invention, an absolute value of a frequency offset X indicated by the frequency offset information is less than or equal to Y subcarriers, X is an integer, and Y is a preset positive integer.

In an embodiment of the invention, X is an integer between-5 and 6, or an integer between-6 and 5, or an integer between 0 and 11.

In an embodiment of the present invention, the frequency offset information includes:

the frequency offset information carried in the MIB or SIB is an offset between a specified narrowband and a preset frequency, the specified narrowband being a narrowband transmitting at least one of: PSS, SSS, PBCH, SIB, RAR, paging message, downlink control channel and PDSCH.

In an embodiment of the present invention, the predetermined frequency is an integer multiple of 100 KHz.

In an embodiment of the present invention, the specified narrowband is one PRB in the LTE system.

In an embodiment of the invention, the frequency offset information indicates a frequency offset that is an integer or odd multiple of 2.5 KHz; the frequency offset information is a frequency offset corresponding to an index in the predefined set.

In an embodiment of the present invention, in a case where the narrowband is an uplink narrowband, the frequency offset information is one of the following:

Frequency offset between the uplink narrow band and the central frequency point of the uplink system bandwidth;

a frequency offset between the uplink narrowband and a designated frequency point, the designated frequency point being determined by a default UE transmit-receive frequency interval;

in the embodiment of the present invention, when the narrowband is an uplink narrowband, the frequency domain location information is a PRB index corresponding to the uplink narrowband.

In an embodiment of the invention, the predefined information or notification information comprises at least one of:

a system bandwidth;

PRB information corresponding to the uplink narrowband;

PRB information corresponding to the downlink narrowband;

the difference between the first value and the second value is the frequency offset value between the uplink narrow band and the central frequency point of the uplink system bandwidth, and the second value is the frequency offset value between the downlink narrow band and the central frequency point of the downlink system bandwidth.

Further, when the narrowband is an uplink narrowband, the center frequency point of the uplink narrowband is:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.015n _UL ；

Or alternatively, the process may be performed,

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09n _UL ；

In the embodiment of the present invention, when the narrowband is an uplink narrowband, the center frequency point of the uplink narrowband is:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.01n _UL

In an embodiment of the invention, n _UL ∈{-4,-3,-2,-1,0,1,2,3,4,5}，

Alternatively, n _UL ∈{-5,-4,-3,-2,-1,0,1,2,3,4}；

Alternatively, n _UL ∈{0,1,2,3,4,5,6,7,8,9}。

F _UL ＝F _DL -Δf+0.015n _UL ；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL ；

In the embodiment of the present invention, the center frequency point of the uplink narrowband is:

F _UL ＝F _DL ′-Δf+0.09n _UL ；

F _UL ＝F _DL -Δf+0.015n _UL +x·0.0075；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL +x·0.0075；

In the embodiment of the present invention, when the narrowband is a downlink narrowband, the center frequency point of the downlink narrowband of the narrowband is:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.3n _DL ；

or alternatively, the process may be performed,

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.2n _DL ；

wherein F is _DL F is the frequency of the center frequency point or the center subcarrier of the downlink narrow band _{DL_LOW} For the lowest frequency, N, of the operating frequency band in which the downlink narrowband is located _DL For the downlink carrier frequency corresponding to the system bandwidth, N _Offs-DL N is an offset value corresponding to the working frequency band where the downlink narrow band is located _DL For the frequency offset value, n _DL Is an integer of F _DL 、F _{DL_LOW} 、N _DL And N _Offs-DL The units are MHz.

The embodiment also provides an information transmission device, which is used for implementing the above embodiment and the preferred implementation, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

Fig. 2 is a block diagram of an information transmission apparatus according to an embodiment of the present invention, and as shown in fig. 2, the apparatus is located in a network device, and the apparatus includes:

a determining module 22, configured to determine frequency offset information or frequency domain location information by the network device;

a transmission module 24, configured to determine a narrowband of transmission information according to the frequency offset information or the frequency domain location information, and transmit information on the narrowband.

By the above means, the determining module 22 is configured to determine the frequency offset information or the frequency domain location information by the network device, the transmitting module 24 is configured to determine a narrowband of the transmission information according to the frequency offset information or the frequency domain location information, and transmit the information on the narrowband, thereby solving the problem of how to determine the narrowband of the transmission channel on the bandwidth of the LTE system, and determining the narrowband of the transmission channel.

Fig. 3 is a block diagram of a second configuration of an information transmission apparatus according to an embodiment of the present invention, and as shown in fig. 3, the determining module 24 includes one of the following:

a custom unit 32 for determining the frequency domain offset information according to predefined information;

a receiving unit 34, configured to receive notification information of the network device and determine the frequency offset information.

The present invention will be described in detail with reference to preferred examples and embodiments.

First preferred embodiment:

the preferred embodiment presents a method of determining the frequency offset and transmitting the channel/information. The preferred embodiment is described by taking an NB-IoT system as an example, and the preferred embodiment is not limited to be applied to the NB-IoT system, but can be applied to other systems.

In the related art, the UE needs to perform a frequency sweep (channel cleaner) at an integer multiple of 100KHz to receive the synchronization channel. In the LTE system, the subcarrier width is 15KHz, so the frequency of the DC subcarrier in the LTE system is a common multiple of 15KHz and 100KHz, namely 300KHz.

In NB-IoT systems, the frequency of the center subcarrier of the synchronization channel PSS/SSS is an integer multiple of 300KHz. For example, when the system bandwidth is 20MHz, the center subcarrier of the PSS/SSS is subcarrier #4 of PRB #8, which satisfies an integer multiple of 300KHz, wherein the PRB index is a PRB index in the prior art, that is, an index obtained by numbering all PRBs in the system bandwidth from the lowest frequency to the highest frequency, and the subcarrier index on the PRB is an index obtained by numbering subcarriers on the PRB from the lowest frequency to the highest frequency. The other subcarriers occupied by the synchronization channel may be 6 subcarriers on each side of the center subcarrier, or 6 subcarriers on one side and 5 subcarriers on the other side, which is not limited by the present invention. Any one of them can be used in practical applications. The eNB may optionally select one of the modes for transmission, and the UE performs blind detection in several manners as described above. Preferably, the subcarrier occupancy is preset, for example, the number of subcarriers fixed to a frequency smaller than the frequency of the center subcarrier is 5, and the number of subcarriers fixed to a frequency larger than the frequency of the center subcarrier is 6. The PBCH is also transmitted on the same narrowband as the synchronization channel.

Other information/channels, such as SIB, downlink control channel, PDSCH, etc., except for the synchronization channel and PBCH are transmitted on a narrowband offset from the PSS/SSS. Alternatively, at least one of the other information/channels except the synchronization channel and the PBCH is transmitted on a narrowband offset from the PSS/SSS.

This has the advantage that only the synchronization channel and the PBCH channel are not aligned with the existing PRBs, while the other channels and the existing PRBs are aligned. Compared with the mode that all channels are transmitted on the narrow band corresponding to the PSS/SSS, the method provided by the invention has the least influence on legacy UE.

Fig. 4 is a schematic diagram of frequency offset information in a system bandwidth according to a preferred embodiment of the present invention, and as shown in fig. 4, the system bandwidth is 20MHz, a thick line frame represents one PRB, and a small box inside the thick line frame represents one subcarrier. The center subcarrier of the PSS/SSS is subcarrier #4 of PRB #8, the occupied narrowband is shown in gray part, the left side of the center subcarrier occupies 5 subcarriers, the right side of the center subcarrier occupies 6 subcarriers, and the narrowband occupied by other channels is shown in oblique part, namely the occupied PRB #8. The eNB may indicate in the PBCH that the other channels are offset by 1 subcarrier to the higher frequency side than the narrowband of the PSS/SSS channel.

Thus, after the UE receives the PSS/SSS and the PBCH, the UE may shift 1 subcarrier to the higher frequency side to receive other channels. After the UE accesses the system, if it needs to re-receive the PSS/SSS/PBCH, it needs to hop to the narrowband where the PSS/SSS/PBCH is located for reception.

The offset information may be preset, for example, preset to offset one subcarrier toward a high frequency direction. Preferably, this approach is used for the scenario where the PSS/SSS are transmitted at preset locations, such as when NB-IoT systems are only used for 10MHz and 20MHz system bandwidths, the center frequencies of the PSS/SSS are both transmitted on subcarrier #4 of some PRBs.

Alternatively, the offset information may be notified by the eNB. The eNB informs the MIB of an offset in subcarriers. The offset information may be a positive integer between 0 and 11, or may be an integer between-6 and 5, or may be an integer between-5 and 6, may be indicated by 4 bits, or may be indicated by encoding in combination with other information.

Optionally, the location of PSS/SSS/PBCH transmissions of the NB-IoT system may be limited to reduce signaling overhead. For example, for even system bandwidth, the transmission is limited on subcarriers #4 and #7 of some PRBs, the offset corresponding to subcarrier #4 is +1, i.e., one subcarrier is offset to the higher frequency side, and the offset corresponding to subcarrier #7 is-2, i.e., 2 subcarriers are offset to the lower frequency side; for odd system bandwidths, the restrictions are sent on subcarriers #5 and #6 of some PRBs, the offset corresponding to subcarrier #5 is 0, and the offset corresponding to subcarrier #6 is-1. Then the 4 offsets may be indicated with 2 bits in the PBCH and the UE determines to receive the narrowband of the other channel based on the indication.

Optionally, when the PSS/SSS/PBCH occupies a part of subcarriers of one PRB, and the PRB is allocated to one UE again, data of the UE on the part of subcarriers is knocked out, and the eNB may transmit to the UE by using a lower code rate, so as to increase the accuracy of transmission.

Alternatively, the UE may align the center frequency of the reception narrowband of the receiver with the center subcarrier when receiving the synchronization signal, such as in fig. 4, the UE aligns the center frequency of the reception narrowband of the receiver with subcarrier #4. Alternatively, the center frequency of the reception narrowband of the receiver may be shifted from the center subcarrier by a certain shift in frequency domain position, for example, for the UE to align the center frequency of the reception narrowband of the receiver with the center positions of the

subcarriers

4 and 5 in fig. 4, i.e., shift the center subcarrier by half a subcarrier, i.e., 7.5KHz, in a direction of higher frequency than the center subcarrier.

Optionally, the eNB notifies the offset of the DC subcarrier of the downlink narrowband and the system bandwidth in the PBCH or MIB, for example, is +60, that is, the center subcarrier of the downlink narrowband is on the 60 th subcarrier on the side of the DC subcarrier of the system bandwidth toward the high frequency, through which the UE can obtain the sequence value of the CRS on the downlink narrowband, and the CRS can be used for demodulation of the information on the downlink narrowband.

Second preferred embodiment:

Similar to the preferred embodiment, the difference is that:

the PSS/SSS, PBCH and SIB1 are all transmitted on the same narrowband, and the eNB notifies the offset between the transmission narrowband of the PSS/SSS, PBCH and SIB1 and the transmission narrowband of the PBCH and SIB1 in SIB1, or at least one of other channels/information of the PSS/SSS, PBCH and SIB. The UE receives the frequency offset information in SIB1 and receives the downlink signal on the corresponding narrowband. Or the offset is preset, and the UE receives the downlink signal on the corresponding narrow band according to the frequency shift.

Alternatively, the PSS/SSS, PBCH and SIB are all transmitted on the same narrowband, the eNB informs the transmission narrowband of at least one of other channels/information except the PSS/SSS, PBCH and SIB or the offset between the transmission narrowband of the PSS/SSS, PBCH and SIB, such as informing the offset information in SIB1 or other SIB message, the UE receives the frequency offset information, and receives the downlink signal on the corresponding narrowband. Or the offset is preset, and the UE receives the downlink signal on the corresponding narrow band according to the frequency shift.

Alternatively, the PSS/SSS, the PBCH and part of the SIBs are all transmitted on the same narrowband, the eNB informs the downlink in the SIBs of the offset between the transmission narrowband of at least one of the other channels/information of the PBCH and part of the SIBs and the PSS/SSS, the PBCH and part of the SIBs, such as the eNB informing the offset information in SIB2, the UE receives the frequency offset information, and receives SIB3 and all the SIBs and downlink other channels/information or other channels/information on the corresponding narrowband. Or the offset is preset, and the UE receives the downlink signal on the corresponding narrow band according to the frequency shift.

Third preferred embodiment:

The downlink narrowband of the NB-IoT is one complete PRB of the LTE system, and all or at least one of the downlink channels is transmitted on the PRB. However, in the LTE system, the center frequency point of all PRBs is not an integer multiple of 100KHz, and the UE may perform frequency sweep according to the integer multiple of 100KHz, so that a certain frequency offset may occur when the UE receives the frequency offset. For example, for a 10MHz system bandwidth, when PSS/SSS is transmitted on PRB#4, and integer multiples of 100KHz, there will be 2.5KHz frequency offset.

In the preferred embodiment, the eNB informs the frequency offset in the PBCH/SIB. Optionally, the frequency offset is an integer multiple of 2.5 KHz. The frequency offset may take on values in a set, such as { +7.5KHz, -7.5KHz, +2.5KHz, -2.5KHz }, with 2 bits being used by the eNB to indicate the frequency offset information in the PBCH/SIB. The UE may obtain the frequency offset value after receiving the PBCH/SIB, and then may adjust the center frequency to the center of one PRB to receive the downlink signal. By adopting the method, the UE is prevented from being influenced by frequency offset when receiving the channel after receiving, and the receiving performance of the UE is improved.

Optionally, the frequency offset is a frequency offset corresponding to an index in a predefined set. For example, the set is a set of several PRBs, each PRB is represented by an index, each PRB corresponds to a frequency offset value, for example, for a 5MHz system bandwidth, a total of 4 PRBs are available to be used as a narrowband of an NB-IoT system, namely

PRB #

2, 7, 17, 22, the 4 PRBs are indicated by 2 bits, the offset corresponding to

PRB #

2, 7 is +7.5khz, the offset corresponding to

PRB #

2, 7 is-7.5khz, and then the UE can obtain the PRB index according to the 2bit information notified by the eNB, and further obtain the offset information.

Fourth preferred embodiment:

The offset between the narrowband of the PBCH and the PSS/SSS is preset, for example, the narrowband of the PSS/SSS is offset by 2 PRBs to the side of low frequency relative to the narrowband of the PBCH. Or may be a subcarrier-level offset, for example, the narrowband of the PSS/SSS is offset by 20 subcarriers to the higher frequency side than the narrowband of the PBCH.

Preferably, the position of the PSS/SSS transmission narrowband is preset, for example, for all system bandwidths, the center subcarrier of the PSS/SSS narrowband is located on the 60 th subcarrier on the side of the DC subcarrier of the system bandwidth where the frequency is high (or, alternatively, on the side where the frequency is low), and this subcarrier satisfies an integer multiple of 100 KHz. Here, the first subcarrier with a higher frequency than the DC subcarrier is the first subcarrier, and so on. The PSS/SSS occupies the sub-carriers from 55 th sub-carrier to 66 th sub-carrier. The offset between the narrowband of the PBCH relative to the PSS/SSS is 18 sub-carriers, i.e. 37 th sub-carrier to 48 th sub-carrier, to the direction of low frequency so that the PBCH can be sent on one PRB, reducing the influence on legacy UE transmission.

Alternatively, the frequency offset information may be contained in the PSS/SSS. For example, the frequency offset information is contained in SSS. The frequency offset is selected from a predetermined set.

Preferred embodiment five:

in the preferred embodiment, the plurality of channels are transmitted on a plurality of narrowband. The preferred embodiment is described by taking an NB-IoT system as an example, and the preferred embodiment is not limited to be applied to the NB-IoT system, but can be applied to other systems.

Several transmission modes are given below.

Mode one:

the PSS/SSS is transmitted on a narrowband. Preferably, the center subcarrier of the PSS/SSS satisfies an integer multiple of 100 KHz.

In addition to the PSS/SSS, the remaining downlink channels are transmitted on other narrowband or narrowband. Similar to the preferred embodiment IV, the narrowband of the PBCH can be obtained by presetting or information contained in the PSS/SSS. The narrowband in which the SIB is located is notified in the PBCH, for example, the PRB information of the narrowband in which the SIB is notified in the MIB, for example, an index of the PRB in which the SIB narrowband is located is given. Or the MIB informs the narrowband in which the SIB is located of offset information of the narrowband in which the MIB is located, for example, offset by 2 PRBs to the side with high frequency. The cheap information may be an integer number of PRBs or an integer number of subcarriers. And the UE receives the SIB according to the offset information.

Optionally, the SIB may include narrowband information where the downlink control channel and/or PDSCH is located, or offset information of the narrowband where the SIB is located, where the downlink control channel includes PDCCH and/or EPDCCH.

Mode two:

multiple channels are transmitted over multiple narrowband bands according to the type/function of the message/channel.

The PSS/SSS/MIB are transmitted on the same narrowband and the remaining downlink channels are transmitted on the other narrowband or narrowband. The MIB contains the narrow band information of the SIB1 or the offset information of the narrow band of the SIB relative to the narrow band of the PSS/SSS/MIB.

Alternatively, the PSS/SSS/MIB/SIB is transmitted on the same narrowband and the remaining downlink channels are transmitted on the other narrowband or narrowband. The SIB contains the narrow-band information of the downlink control channel and/or the PDSCH, or the SIB informs the offset information of the narrow-band where the downlink control channel and/or the PDSCH is located relative to the narrow-band where the MIB is located. Further, the SIB indicates the RAR, downlink control information for scheduling the RAR, paging message, and narrowband information for scheduling the downlink control information for the paging message.

Alternatively, the PSS/SSS/MIB/SIB and all common messages including the RAR, the downlink control information for scheduling the RAR, the paging message and the downlink control information for scheduling the paging message are transmitted on the same narrowband. Unicast information of the UE is sent on other narrowband, and the eNB indicates to the UE in SIB the downlink control channel and/or narrowband of PDSCH where the UE receives unicast information.

Or transmitting the PSS/SSS/MIB/SIB and part of the common message on the same narrow band, wherein the common message comprises RAR, downlink control information for scheduling the RAR, paging message and downlink control information for scheduling the paging message. The eNB indicates in the SIB the narrowband in which the remaining public messages are located and the narrowband of the unicast information of the UE.

Alternatively, the PSS/SSS/MIB/SIB and all/part of the common message are transmitted on a narrowband, and the UE receives the downlink signal on the narrowband before receiving the narrowband information of the detected downlink control channel sent by the eNB. And if the UE receives the narrowband information for detecting the downlink control channel, the UE detects the downlink control channel on the narrowband. The eNB includes the narrowband information in RRC signaling sent to the UE, or includes the narrowband information in message four.

Alternatively, the downlink control channel and PDSCH may be notified of only the downlink control channel in the same narrowband, such as SIB, and the PDSCH narrowband and downlink control information narrowband are the same. There may be only one or more than one narrowband of the downlink control channels, and the UE may receive the downlink control channels on one narrowband according to a preset rule, for example, determined according to the C-RNTI.

Mode three:

all the narrowband is independently operated, i.e. all downlink channels/information including PSS/SSS, PBCH, SIB, RAR, paging messages, downlink control channels and downlink data channels are transmitted on each narrowband.

Mode four:

some of the narrowband is independently operated, i.e. all downlink channels/information including PSS/SSS, PBCH, SIB, RAR, paging messages, downlink control channels and downlink data channels are transmitted on the narrowband. The rest narrowband is the narrowband which only supports unicast data and is used for transmitting a downlink control channel and a PDSCH special for the UE.

In the above several ways, the UE may be operating on one narrowband all the time for ways three and four. For all modes, the UE may perform frequency hopping transmission, where the frequency hopping transmission may be to frequency hop to a narrowband to receive certain information, for example, for mode one, the UE receives a synchronization signal on a PSS/SSS narrowband, and then frequency hop to a certain narrowband to detect a downlink control channel. The frequency hopping transmission may also be a transmission frequency hopping over a plurality of narrow bands in order to improve the performance of a certain transmission. For example, in a coverage enhancement scene, a certain UE needs to repeatedly transmit 20 subframes, so that the UE performs frequency hopping transmission on a plurality of narrow bands, thereby increasing frequency diversity gain and improving transmission performance.

Preferred embodiment six:

the preferred embodiment provides a method for obtaining an uplink narrow band. The preferred embodiment is illustrated with respect to an NB-IoT system, and the proposed method is not limited to application in NB-IoT systems.

eNB informs UE of uplink carrier frequency N corresponding to system bandwidth _UL The UE is according to N _UL Center frequency point F capable of obtaining uplink system bandwidth _UL ′＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL ) Wherein F _{UL_LOW} For the N _UL The minimum frequency of the corresponding uplink Operation Band is MHz, N _UL And the corresponding uplink working frequency band is the working frequency band where the uplink narrow band is located. N (N) _Offs-UL The offset value corresponding to the uplink operating band is a constant, such as for band #1, N _Offs-UL 18000.

The frequency domain position of the uplink narrow band satisfies:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.015n _UL

wherein n is _UL Is an integer. That is, the center frequency point of the uplink narrowband is offset by an integer multiple of subcarriers in the direction of low or high frequency of the center frequency point of the uplink system bandwidth.

Or alternatively, the process may be performed,

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09n _UL

wherein n is _UL Is an integer. That is, the center frequency point of the uplink narrowband is an integer multiple of half PRB shifted in the direction of low or high frequency from the center frequency point of the uplink system bandwidth. When the system bandwidth is even, the central frequency point of the uplink narrow band is an odd multiple of half PRB (physical layer resource block) offset to the direction of low or high frequency of the central frequency point of the uplink system bandwidth; when the system bandwidth is odd, the center frequency point of the uplink narrow band is an even multiple of half PRB in the direction of low or high frequency.

Optionally, the frequency domain position of the uplink narrowband is obtained in a preset manner, for example, n is as described above _UL Is a preset value.

Optionally, the preset or eNB notifies the UE of DC location information of the system bandwidth, and the frequency domain location of the uplink narrowband is obtained according to the information. For example, the eNB informs the UE of DC and downlink narrowband offset information, which may be contained in the SIB. For example, the eNB notifies the UE that DC is the kth subcarrier in the direction of low frequency of the center frequency point/center subcarrier/start subcarrier/stop subcarrier of the downlink narrowband, or in the middle position of the kth subcarrier and the kth+1th subcarrier, or the kth subcarrier in the direction of high frequency of DC of the center frequency point/center subcarrier/start subcarrier/stop subcarrier of the downlink narrowband, or in the middle position of the kth subcarrier and the kth+1th subcarrier. The downlink narrowband is assumed to occupy N subcarriers, the subcarrier indexes are respectively 0-N-1 from the lowest frequency to the highest frequency, if N is even, the center frequency point is the middle position of subcarrier# (N/2-1) and subcarrier #n, the center subcarrier is subcarrier (N/2-1) or N, the initial subcarrier is 0, and the cut-off subcarrier is N-1. For example, if the downlink narrowband occupies 12 subcarriers, the subcarrier index is 0-11 from the lowest frequency to the highest frequency, then the center frequency point is the middle position of

subcarriers #

5 and 6, the center subcarrier is

subcarrier

5 or 6, the starting subcarrier is 0, the cut-off subcarrier is 11, if N is odd, the center frequency point is the center frequency point of subcarrier # (N/2), the center subcarrier is subcarrier (N/2), the starting subcarrier is 0, the cut-off subcarrier is N-1, it is assumed that the starting subcarrier/cut-off subcarrier/center subcarrier of the downlink narrowband is the nth 1 subcarrier with a frequency higher/lower than DC, the starting subcarrier/cut-off subcarrier/center subcarrier of the uplink narrowband is the nth 2 subcarrier higher/lower than the center frequency point, where n1=n2, or N1-n2=c, where c is an integer, and is a preset constant. Or, the center frequency point of the downlink narrowband is higher/lower than the center frequency point of the downlink system bandwidth by f1, and the center frequency point of the uplink narrowband is higher/lower than the center frequency point of the uplink system bandwidth by f2, wherein f1=f2, or f1-f2=c, wherein c= (15m+7.5) KHz, or c= (15 m) KHz, wherein m is an integer.

Optionally, the eNB may also notify the UE of an offset value between the uplink narrowband and the center frequency point of the uplink system bandwidth. The offset value may be an offset value between a starting subcarrier/truncated subcarrier/center frequency point/center subcarrier of the uplink narrowband and a center frequency point of the uplink system bandwidth. After the UE obtains the center frequency point of the uplink system bandwidth, the UE obtains the position of the uplink narrowband according to the offset value, where the offset value may indicate an integer multiple of subcarriers or be an integer multiple of PRBs, e.g., n in the above formula _UL 。

Optionally, the eNB notifies the UE of the system bandwidth information and notifies the UE of the PRB index corresponding to the uplink narrowband, and then the UE may obtain the location of the uplink narrowband according to the system bandwidth and the PRB index. Optionally, the eNB notifies a frequency offset between a PRB index corresponding to an uplink narrowband and a PRB index corresponding to a downlink narrowband, where the PRB index corresponding to the downlink narrowband is a PRB index where the downlink narrowband is located, or is a PRB index where a starting subcarrier/a truncated subcarrier/a center frequency point/a center subcarrier of the downlink narrowband is located.

Preferred embodiment seven:

eNB informs UE of uplink carrier frequency N corresponding to system bandwidth _UL The UE is according to N _UL Center frequency point F capable of obtaining uplink system bandwidth _UL ′＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL ) Wherein F _{UL_LOW} For the N _UL The minimum frequency of the corresponding uplink Operation Band is MHz, N _Offs-UL The offset value corresponding to the uplink operating band is a constant, such as for band #1, N _Offs-UL 18000.

The frequency domain position of the uplink narrow band satisfies:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.015n _UL

Further, the frequency domain position of the uplink frequency point may satisfy the following formula:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09n _UL

Further, when the UE knows that the system bandwidth is an odd bandwidth or an even bandwidth, the frequency domain location of the uplink frequency point may be determined as follows. If the system bandwidth is an odd bandwidth, for example, 3MHz/5MHz/15MHz, the frequency domain position of the uplink frequency point can satisfy the following formula:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.18n _UL

wherein n is _UL Is an integer. That is, the center frequency point of the uplink narrowband is an integer multiple of the offset PRB of the center frequency point of the uplink system bandwidth in the direction of low or high frequency.

If the system bandwidth is an even bandwidth, for example, 10MHz/20MHz, the frequency domain position of the uplink frequency point may satisfy the following equation:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09(2n _UL +1)

wherein n is _UL Is an integer. That is, the center frequency point of the uplink narrowband is an odd multiple of half a PRB shifted in the direction of low or high frequency from the center frequency point of the uplink system bandwidth.

subcarriers #

5 and 6, the center subcarrier is

subcarrier

Alternatively, for an inband scenario, the uplink narrowband should be one PRB in the system, and for a guard band scenario, the uplink narrowband may not be aligned with the PRB.

Preferred embodiment eight:

eNB informs UE of uplink carrier frequency N corresponding to uplink narrowband _UL The UE is according to N _UL The center frequency point of the uplink narrow band can be obtained, and the center frequency point of the uplink narrow band is as follows:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.01n _UL ，

wherein n is _UL Is an integer.

Preferably n _UL ∈{-4,-3,-2,-1,0,1,2,3,4,5}

Alternatively, n _UL ∈{-5,-4,-3,-2,-1,0,1,2,3,4}

Alternatively, n _UL ∈{0,1,2,3,4,5,6,7,8,9}

Wherein F is _{UL_LOW} For the N _UL The minimum frequency of the corresponding uplink Operation Band is MHz, N _Offs-UL The offset value corresponding to the uplink operating band is a constant, such as for band #1, N _Offs-UL 18000.

Optionally, the n _UL Is preset, e.g. fixed to 0, or n _UL Is notified by the eNB, can be notified in the SIB, or in RRC signaling, such as the eNB employing 4 bits to indicate n _UL Or the information can be indicated by joint coding with other information.

Preferred embodiment nine:

The UE obtains a Default UE transmitting-receiving frequency interval Default UE TX-RX frequency separation delta f corresponding to the working frequency Band according to a downlink center frequency point obtained by channel user frequency sweep and according to the working frequency Band Operation Band of the downlink center frequency point, and then obtains an uplink center frequency point according to the downlink frequency point and the transmitting-receiving center frequency interval, wherein the uplink center frequency point is as follows:

F _UL ＝F _DL -Δf+0.015n _UL

Wherein F is _DL For the center frequency point of the downlink narrow band or the center frequency point of the downlink center subcarrier, the center frequency point of the downlink center subcarrier can be simply called as the frequency point of the downlink center subcarrier, n _UL The number of subcarriers shifted from the uplink center frequency obtained by the transmission-reception center frequency interval is expressed as an integer. Said n _UL May be preset, such as 0, or may be notified by the eNB, such as indicated in the SIB. Optionally, the n _UL May be an integer of 0 to 11, or an integer of-5 to 6, or an integer of-6 to 5.

Or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL

wherein n is _UL The integer represents an integer multiple of a half PRB shift in the frequency up/down direction with respect to the uplink center frequency point obtained by the transmission-reception center frequency interval. Said n _UL May be preset, such as 0, or may be notified by the eNB, such as indicated in the SIB. Optionally, the n _UL May be an integer between-110 and 110.

Preferred embodiment ten:

The center frequency point of the uplink narrow band is:

F _UL ＝F _DL ′-Δf+0.09n _UL ；

F _DL ' may be an eNBThe UE is informed, for example, by the eNB of the frequency interval between the center of the system bandwidth and the center subcarrier of the downlink narrowband.

Preferred embodiment eleven:

The UE obtains a default UE transmitting-receiving frequency interval corresponding to the working frequency Band according to a downlink center frequency point obtained by channel subscriber frequency sweep and according to the working frequency Band Operation Band of the downlink center frequency point, and then obtains an uplink center frequency point according to the downlink frequency point and the transmitting-receiving center frequency interval, wherein the uplink center frequency point is as follows:

F _UL ＝F _DL -Δf+0.015n _UL +x·0.0075

wherein F is _DL Is the center frequency point of the downlink narrow band, n _UL The number of subcarriers shifted from the uplink center frequency obtained by the transmission-reception center frequency interval is expressed as an integer. Said n _UL May be preset, such as 0, or may be notified by the eNB, such as indicated in the SIB. Optionally, the n _UL May be an integer of 0 to 11, or an integer of-5 to 6, or an integer of-6 to 5. x is 1 or-1, so as to ensure that the center of the uplink frequency point is also in the middle of two subcarriers when the downlink center frequency point is between the two subcarriers.

Or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL +x·0.0075

Twelve preferred embodiments:

the center frequency point of the downlink narrowband/the center frequency point of the center subcarrier satisfies:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )

wherein F is _{DL_LOW} For the N _DL The minimum frequency of the corresponding downlink Operation Band is MHz, N _Offs-DL The offset value corresponding to the downlink operating band is a constant, such as for band #1, N _Offs-DL Is 0.

Optionally, the center frequency point of the downlink narrowband/the center frequency point of the center subcarrier satisfies:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.3n _DL

wherein N is _DL N is corresponding to the central frequency point of the system bandwidth _DL ，n _DL Is integer, preset, or eNB configured, such as eNB to UE configuration, or determined from eNB to UE configuration information.

Alternatively, n _DL Is-3 to-29 or an integer between 3 and 29.

Optionally, for NB-IoT operating on guard band, the center frequency point of the downlink narrowband/center frequency point of the center subcarrier satisfies:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.2n _DL

wherein N is _DL N is corresponding to the central frequency point of the system bandwidth _DL ，n _DL Is preset, or configured by the eNB, such as configured by the eNB to the UE, or determined according to information configured by the eNB to the UE. Alternatively, n _DL Is determined by the system bandwidth of the cell.

Thirteen preferred embodiments:

in the LTE system, the uplink digital baseband and the analog baseband are staggered by 7.5KHz, namely, half subcarrier, and for NB-IoT scenario, transmission with a subcarrier width of 3.75KHz is introduced, so that in order to avoid interference with legacy UE, the uplink digital baseband and the analog baseband should also be staggered by 7.5KHz, namely, staggered by 7.5/3.75=2 subcarriers. If the uplink uses a transmission with a subcarrier width of 2.5kHz, 7.5/2.5=3 subcarriers need to be staggered.

From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the modules are located in a plurality of processors, respectively.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the above-described storage medium may be configured to store program codes for performing the method steps of the above-described embodiment.

Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Optionally, in this embodiment, the processor performs the method steps of the above embodiment according to program code stored in a storage medium.

Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.

It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may alternatively be implemented in program code executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for transmitting information, comprising:

the network equipment determines frequency offset information;

determining a narrow band for transmitting information according to the frequency offset information, and transmitting information on the narrow band;

wherein the frequency offset information includes one of:

2. The method of claim 1, wherein the network device determining frequency offset information comprises one of:

determining the frequency offset information according to predefined information;

3. The method of claim 2, wherein the step of determining the position of the substrate comprises,

The first narrowband, the third narrowband, the fifth narrowband, and the seventh narrowband are one physical resource block PRB in a long-term evolution LTE system.

4. The method of claim 2, wherein the step of determining the position of the substrate comprises,

and the center frequency points of the center subcarriers of the second narrow band, the fourth narrow band, the sixth narrow band and the eighth narrow band meet the integral multiple of 100 KHz.

5. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the frequency offset information indicates the number of offset subcarriers.

6. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the absolute value of the frequency offset X indicated by the frequency offset information is less than or equal to Y subcarriers, X is an integer,

y is a preset positive integer.

7. The method of claim 6, wherein the step of providing the first layer comprises,

x is an integer between-5 and 6, alternatively an integer between-6 and 5, alternatively an integer between 0 and 11.

8. The method of claim 1, wherein the frequency offset information comprises:

9. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

the preset frequency is an integer multiple of 100 KHz.

10. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

the specified narrowband is one PRB in the LTE system.

11. The method of claim 8, comprising one of the following

The frequency offset indicated by the frequency offset information is an integer multiple or an odd multiple of 2.5 KHz;

the frequency offset information is a frequency offset corresponding to an index in a predefined set.

12. The method of claim 2, wherein the step of determining the position of the substrate comprises,

in the case that the narrowband is an uplink narrowband, the frequency offset information is one of:

and the frequency offset between the uplink narrow band and the designated frequency point is determined by a default UE transmitting-receiving frequency interval.

13. The method of claim 1, wherein the step of determining the position of the substrate comprises,

when the narrowband is an uplink narrowband, the frequency domain location information is a PRB index corresponding to the uplink narrowband.

14. The method according to claim 2 or 12, wherein,

the predefined information or notification information includes at least one of:

a system bandwidth;

PRB information corresponding to the uplink narrowband;

PRB information corresponding to downlink narrowband;

15. The method according to claim 1 or 12, wherein,

and under the condition that the narrowband is an uplink narrowband, the center frequency point of the uplink narrowband is as follows:

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.015n _UL ；

or alternatively, the process may be performed,

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.09n _UL ；

16. The method according to claim 1 or 12, wherein,

F _UL ＝F _{UL_LOW} +0.1(N _UL -N _Offs-UL )+0.01n _UL

17. The method of claim 16, wherein the step of determining the position of the probe comprises,

n _UL ∈{-4,-3,-2,-1,0,1,2,3,4,5}，

alternatively, n _UL ∈{-5,-4,-3,-2,-1,0,1,2,3,4}；

Alternatively, n _UL ∈{0,1,2,3,4,5,6,7,8,9}。

18. The method according to claim 1 or 12, wherein,

F _UL ＝F _DL -Δf+0.015n _UL ；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL ；

19. The method of claim 12, wherein the step of determining the position of the probe is performed,

the center frequency point of the uplink narrow band is as follows:

F _UL ＝F _DL ′-Δf+0.09n _UL ；

20. The method of claim 12, wherein the step of determining the position of the probe is performed,

the center frequency point of the uplink narrow band is as follows:

F _UL ＝F _DL -Δf+0.015n _UL +x·0.0075；

or alternatively, the process may be performed,

F _UL ＝F _DL -Δf+0.09n _UL +x·0.0075；

21. The method according to claim 1 or 12, wherein,

and under the condition that the narrowband is a downlink narrowband, the center frequency point of the downlink narrowband is as follows:

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.3n _DL ；

or alternatively, the process may be performed,

F _DL ＝F _{DL_LOW} +0.1(N _DL -N _Offs-DL )+0.2n _DL ；

22. An information transmission apparatus, located in a network device, comprising:

a determining module, configured to determine frequency offset information by a network device;

the transmission module is used for determining a narrow band for transmitting information according to the frequency offset information and transmitting information on the narrow band;

wherein the frequency offset information includes one of:

23. The apparatus of claim 22, wherein the determining means comprises one of:

the self-defining unit is used for determining the frequency offset information according to the predefined information;