WO2019204990A1 - Channel transmission method and network device - Google Patents

Abstract

Embodiments of the present invention relate to the field of communications and provide a channel transmission method and a network device. A network device in a network can directly transmit a DRS to a terminal device by using an unlicensed spectrum. The method comprises: a network device determines first information, the first information comprising a broadcast message, a first synchronization sequence, a second synchronization sequence, and a system message, and the first information being used for instructing the terminal device to access the network device according to the first information; the network device transmits a first channel to the terminal device at a fixed frequency point, the first channel being used for carrying the first information, so that the terminal device accesses the network device according to the first information, and the bandwidth of the first channel being greater than 500 kHz.

Description

Channel transmitting method and network device Technical field

The present application relates to the field of communications, and in particular, to a channel sending method and a network device.

Background technique

The Cellular-based Narrow Band Internet of Things (NB-IoT) is an important branch of the Internet of Everything, providing comprehensive indoor cellular data connection coverage. The system bandwidth of NB-IoT is 180 kHz, that is, one resource block (RB) is occupied in the frequency domain, and each uplink and downlink occupies a fixed 180 kHz channel.

In an unlicensed spectrum, spectrum resources are shared by multiple devices. If a device occupies a fixed frequency for a long time, it will affect the use of the frequency by other devices. In order to solve this problem, in the Federal Communications Commission (FCC) regulations, devices with system bandwidth below 500 kHz are constrained, and such devices must be frequency hopped in the transmission process. For devices with a system bandwidth above 500 kHz, regulations impose a power spectral density of no greater than 8 dBm/3 kHz.

In the existing communication system, the base station usually uses an anchor channel to carry a discovery reference signal (DRS) to effectively reduce the access delay of the terminal. Among them, the frequency of the fixed channel does not change. The DRS includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). If the DRS in the NB-IoT is directly applied to the unlicensed spectrum, the channel carrying the DRS will perform frequency hopping according to the regulations, which greatly increases the access delay of the terminal device. At the same time, the PBCH channel is the bottleneck of the NB-IoT downlink coverage capability. If the PBCH is transmitted at a fixed frequency, its power spectral density will be limited and the system coverage capability will be poor.

Summary of the invention

The embodiment of the invention provides a channel sending method and a network device, and the network device can directly apply the unlicensed spectrum to the terminal device to send the DRS, and does not increase the access delay of the terminal.

In a first aspect, a channel transmission method is disclosed. The network device first determines first information, wherein the first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and system information. The first information is used to instruct the terminal device to access the network device according to the first information. Further, the network device sends the first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network device according to the first information; the bandwidth of the first channel is greater than 500 kHz. It should be noted that the first information may be considered as a DRS, including: PSS, SSS, SIB, and PBCH.

It can be seen that the network device sends a channel that is greater than or equal to 500 kHz to the terminal device at a fixed frequency (the channel can carry the DRS), which is consistent with the limitation of the frequency band by the FCC regulations in the US. Therefore, the network device can be directly applied in the embodiment of the present invention. The unlicensed spectrum transmits a DRS to the terminal device, so that the terminal device can access the network device according to the received DRS. In addition, since the network device sends the DRS to the terminal device by using a fixed frequency point, the channel carrying the DRS does not perform frequency hopping, and the access delay of the terminal device is not increased.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel. In addition, the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, and N is an integer greater than or equal to 1, P is 1 or 2; wherein the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the xth system frame of the M system frames on the second carrier The first two subframes, the first two subframes of the x+1th system frame, and the first two subframes of the x+2 system frame are used to send a broadcast message; x satisfies: xmod4=k, and k is greater than or equal to 0. It is equal to 3 integers; it should be noted that the M system frames corresponding to the i-th transport block in the N transport blocks are earlier than the M system frames corresponding to the i+1th transport block in the N transport blocks, and the first The M system frames corresponding to the i transport blocks are adjacent to the M system frames corresponding to the i+1th transport block in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

It should be noted that the PBCH transmission period in the prior art is 640 ms, including eight transport blocks having a length of 80 ms. One transport block includes 8 system frames, and one system frame has one subframe to transmit PBCH. That is to say, the transmission time of the PBCH in the prior art is: 1*8*8=64ms. In the embodiment of the present invention, the length of the transport block is greater than or equal to 80 ms, and at least 8 system frames are included in one transport block. 6 system frames of the 8 system frames can be used to send the PBCH, and the two subframes in the system frame send the PBCH. Therefore, the time for a transport block to transmit a PBCH is at least 2*6=12ms. Taking N=8 as an example, the time for transmitting the PBCH in a PBCH transmission period is at least 8*12=96 ms. It can be seen that the embodiment of the present invention improves the transmission time of the PBCH, which is beneficial to improving the coverage performance of the PBCH.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the first two subframes of the x+3th system frame in the M system frames on the second carrier The second carrier is used to transmit the second synchronization sequence, where the first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry system information.

Here, a second synchronization sequence and a specific distribution of system information in the first channel are provided.

With reference to the first aspect, in a third possible implementation of the first aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier is smaller than Or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, where N is An integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the designation in the M system frames on the second carrier The first two subframes of the system frame are used to send the second synchronization sequence; the specified system frame is the x+3th system frame in the M system frames, x satisfies: xmod4=k, and k is greater than or equal to 0 and less than or equal to 3 integers; The M system frames corresponding to the i th transport block are earlier than the M system frames corresponding to the i+1th transport block, and the M system frames corresponding to the i th transport block correspond to the i+1th transport block. The M system frames are adjacent in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

In conjunction with the third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, three consecutive system frames preceding the Qth specified system frame on the third carrier transmit broadcast information, and second Three consecutive system frames preceding the Q+1th specified system frame on the carrier transmit a broadcast message; three consecutive system frames before the Qth specified system frame are adjacent to the Qth specified system frame, and the Q+1th designation Three consecutive system frames before the system frame are adjacent to the Q+1th specified system frame; three consecutive system frames before the Qth specified system frame on the second carrier transmit system information, and the third carrier is Q+ The system information is transmitted by one specified system frame and four consecutive system frames before the Q+1th specified system frame; the first carrier is used to carry the first synchronization sequence; wherein Q is an integer greater than or equal to 1 and less than or equal to M.

Similarly, in the embodiment of the present invention, the length of the transport block is greater than or equal to 80 ms, and at least 8 system frames are included in one transport block, and 6 of the 8 system frames are used for transmitting the PBCH, and two subframes in the system frame are sent. PBCH, therefore, a transport block sends PBCH for at least 2*6=12ms. Taking N=8 as an example, the time for transmitting the PBCH in a PBCH transmission period is at least 12*8=96 ms. It can be seen that the embodiment of the present invention improves the transmission time of the PBCH, which is beneficial to improving the coverage performance of the PBCH.

In conjunction with the first aspect or any one of the possible implementations of the first aspect, in a fifth possible implementation of the first aspect, t is equal to 40 ms.

提高了PBCH的覆盖性能。 It should be noted that when P=2, t=40ms, the length of the transport block is 160ms, and one PBCH transmission period includes eight transport blocks with a length of 160ms. A transport block includes 16 system frames, of which 12 system frames have PBCH transmission, and one system frame has two subframes for transmitting PBCH. That is to say, the sending time of the PBCH in the embodiment of the present invention is: 2*12*8=192ms. For example, the SSS period is 40 ms. In the embodiment of the present invention, the PBCH is transmitted 192/64 times of the time of transmitting the PBCH in the prior art, that is, the gain of the coverage performance of the PBCH is compared with the prior art:

Improve the coverage performance of PBCH.

In a second aspect, a network device is disclosed, including: a determining unit, configured to determine first information, where the first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and system information; the first information is used to indicate the terminal The device accesses the network device according to the first information; the sending unit is configured to send the first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network device according to the first information; The bandwidth of the first channel is greater than 500 kHz.

It can be seen that the network device sends a channel that is greater than or equal to 500 kHz to the terminal device at a fixed frequency (the channel can carry the DRS), which is consistent with the limitation of the frequency band by the FCC regulations in the US. Therefore, the network device can be directly applied in the embodiment of the present invention. The unlicensed spectrum transmits a DRS to the terminal device, so that the terminal device can access the network device according to the received DRS. In addition, since the network device sends the DRS to the terminal device by using a fixed frequency point, the channel carrying the DRS does not perform frequency hopping, and the access delay of the terminal device is not increased.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, N For an integer greater than or equal to 1, P is 1 or 2; wherein, the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and M system frames on the second carrier The first two subframes of the xth system frame, the first two subframes of the x+1th system frame, and the first two subframes of the x+2th system frame are used to transmit a broadcast message; x satisfies: xmod4=k And k is greater than or equal to 0 and less than or equal to 3 integers; the M system frames corresponding to the i th transport block in the N transport blocks are earlier than the M system frames corresponding to the i+1th transport block in the N transport blocks, And the M system frames corresponding to the i th transport block are adjacent to the M system frames corresponding to the i+1th transport block in the time domain, i An integer greater than or equal less than or equal to N-1.

In conjunction with the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the first two subframes of the x+3th system frame in the M system frames on the second carrier The second carrier is used to transmit the second synchronization sequence, where the first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry system information.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, N For an integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; in the M system frames on the second carrier The first two subframes of the specified system frame are used to send the second synchronization sequence; the specified system frame is the x+3th system frame in the M system frames, x satisfies: xmod4=k, and k is greater than or equal to 0 and less than or equal to 3 An integer number; wherein the M system frames corresponding to the i-th transport block are earlier than the M system frames corresponding to the i+1th transport block, and the M system frames corresponding to the i-th transport block and the (i+1)th transmission The M system frames corresponding to the block are adjacent in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the three consecutive system frames preceding the Qth specified system frame on the third carrier send broadcast information, where Three consecutive system frames preceding the Q+1th specified system frame on the two carriers transmit broadcast messages; three consecutive system frames before the Qth specified system frame are adjacent to the Qth specified system frame, Q+1th Three consecutive system frames preceding the specified system frame are adjacent to the Q+1th specified system frame; three consecutive system frames preceding the Qth specified system frame on the second carrier transmit system information, and the third carrier is Q +1 specified system frames and four consecutive system frames before the Q+1th specified system frame transmit system information; the first carrier is used to carry the first synchronization sequence; wherein Q is an integer greater than or equal to 1 and less than or equal to M.

In conjunction with the second aspect or any one of the possible implementations of the second aspect, in a fifth possible implementation of the second aspect, t is equal to 40 ms.

In a third aspect, a network device is disclosed, including: a processor, configured to determine first information, where the first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and system information; the first information is used to indicate the terminal The device accesses the network device according to the first information; the transceiver is configured to send the first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network device according to the first information; The bandwidth of the first channel is greater than 500 kHz.

In the embodiment of the present invention, the network device sends a channel that is greater than or equal to 500 kHz to the terminal device at a fixed frequency (the channel can carry the DRS), which is consistent with the limitation of the frequency band by the FCC regulations in the US. Therefore, the network in the embodiment of the present invention The device can directly apply the unlicensed spectrum to the terminal device to send the DRS, so that the terminal device can access the network device according to the received DRS. In addition, since the network device sends the DRS to the terminal device by using a fixed frequency point, the channel carrying the DRS does not perform frequency hopping, and the access delay of the terminal device is not increased.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, N For an integer greater than or equal to 1, P is 1 or 2; wherein, the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and M system frames on the second carrier The first two subframes of the xth system frame, the first two subframes of the x+1th system frame, and the first two subframes of the x+2th system frame are used to transmit a broadcast message; x satisfies: xmod4=k And k is greater than or equal to 0 and less than or equal to 3 integers; the M system frames corresponding to the i th transport block in the N transport blocks are earlier than the M system frames corresponding to the i+1th transport block in the N transport blocks, And the M system frames corresponding to the i th transport block are adjacent to the M system frames corresponding to the i+1th transport block in the time domain, i An integer greater than or equal less than or equal to N-1.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the first two subframes of the x+3 system frames in the M system frames on the second carrier The second carrier is used to transmit the second synchronization sequence, where the first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry system information.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, N For an integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; in the M system frames on the second carrier The first two subframes of the specified system frame are used to send the second synchronization sequence; the specified system frame is the x+3th system frame in the M system frames, x satisfies: xmod4=k, and k is greater than or equal to 0 and less than or equal to 3 integers The M system frames corresponding to the i th transport block are earlier than the M system frames corresponding to the i+1th transport block, and the M system frames and the i+1th transport block corresponding to the i th transport block The corresponding M system frames are adjacent in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the three consecutive system frames preceding the Qth specified system frame on the third carrier send broadcast information, where Three consecutive system frames preceding the Q+1th specified system frame on the two carriers transmit broadcast messages; three consecutive system frames before the Qth specified system frame are adjacent to the Qth specified system frame, Q+1th Three consecutive system frames preceding the specified system frame are adjacent to the Q+1th specified system frame; three consecutive system frames preceding the Qth specified system frame on the second carrier transmit system information, and the third carrier is Q +1 specified system frames and four consecutive system frames before the Q+1th specified system frame transmit system information; the first carrier is used to carry the first synchronization sequence; wherein Q is an integer greater than or equal to 1 and less than or equal to M.

With reference to the third aspect or any one of the possible implementation manners of the foregoing third aspect, in a fifth possible implementation manner of the third aspect, t is equal to 40 ms.

A fourth aspect, a computer readable storage medium having stored therein instructions; when it is run on a network device as described in the third aspect and any of its possible implementations, The network device is caused to perform the channel transmission method as described in the first aspect above and its various possible implementations.

In a fifth aspect, a wireless communication device is disclosed, the wireless communication device storing instructions for causing the wireless communication device to operate on a network device as described in the third aspect and any possible implementation thereof The network device performs the channel transmission method as described in the first aspect above and its various possible implementations. In a specific implementation, the wireless communication device can be a chip.

For a detailed description of the second aspect, the third aspect, the fourth aspect, the fifth aspect, and various implementations thereof, reference may be made to the detailed description in the first aspect and various implementations thereof; and the second aspect, For the beneficial effects of the third aspect, the fourth aspect, the fifth aspect, and various implementations thereof, reference may be made to the beneficial effects in the first aspect and various implementation manners thereof, and details are not described herein again.

In a sixth aspect, a channel transmission method is disclosed, including:

The terminal device receives the first channel that is sent by the network device at a fixed frequency, and the first channel is used to carry the first information, where the bandwidth of the first channel is greater than 500 kHz. The first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and system information. The first information is used to instruct the terminal device to access the network device according to the first information.

It can be seen that the network device sends a channel greater than or equal to 500 kHz to the terminal device at a fixed frequency point, which is consistent with the limitation of the frequency band by the US FCC regulations. Therefore, the network device can directly apply the unlicensed spectrum to the terminal device to send the DRS, so that the terminal device The network device can be accessed according to the information in the DRS.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier Less than or equal to the bandwidth of the first channel. In addition, the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, and N is an integer greater than or equal to 1, P is 1 or 2; wherein the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the xth system frame of the M system frames on the second carrier The first two subframes, the first two subframes of the x+1th system frame, and the first two subframes of the x+2 system frame are used to send a broadcast message; x satisfies: xmod4=k, and k is greater than or equal to 0. It is equal to 3 integers; it should be noted that the M system frames corresponding to the i-th transport block in the N transport blocks are earlier than the M system frames corresponding to the i+1th transport block in the N transport blocks, and the first The M system frames corresponding to the i transport blocks are adjacent to the M system frames corresponding to the i+1th transport block in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

It should be noted that the PBCH transmission period in the prior art is 640 ms, including eight transport blocks having a length of 80 ms. One transport block includes 8 system frames, and one system frame has one subframe to transmit PBCH. That is to say, the transmission time of the PBCH in the prior art is: 1*8*8=64ms. In the embodiment of the present invention, the length of the transport block is greater than or equal to 80 ms, and at least 8 system frames are included in one transport block. 6 system frames of the 8 system frames can be used to send the PBCH, and the two subframes in the system frame send the PBCH. Therefore, the time for a transport block to transmit a PBCH is at least 2*6=12ms. Taking N=8 as an example, the time for transmitting the PBCH in a PBCH transmission period is at least 12*8=96 ms. It can be seen that the embodiment of the present invention improves the transmission time of the PBCH, which is beneficial to improving the coverage performance of the PBCH.

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the first two subframes of the x+3 system frames in the M system frames on the second carrier The second carrier is used to transmit the second synchronization sequence, where the first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry system information.

Here, a second synchronization sequence and a specific distribution of system information in the first channel are provided.

With reference to the sixth aspect, in a third possible implementation of the sixth aspect, the first channel includes a first carrier, a second carrier, and a third carrier; and a sum of bandwidths of the first carrier, the second carrier, and the third carrier is smaller than Or equal to the bandwidth of the first channel; the broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , t is the period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms, where N is An integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the designation in the M system frames on the second carrier The first two subframes of the system frame are used to send the second synchronization sequence; the specified system frame is the x+3th system frame in the M system frames, x satisfies: xmod4=k, and k is greater than or equal to 0 and less than or equal to 3 integers; The M system frames corresponding to the i th transport block are earlier than the M system frames corresponding to the i+1th transport block, and the M system frames corresponding to the i th transport block correspond to the i+1th transport block. The M system frames are adjacent in the time domain, and i is an integer greater than or equal to 1 and less than or equal to N-1.

In conjunction with the third possible implementation of the sixth aspect, in a fourth possible implementation of the sixth aspect, three consecutive system frames preceding the Qth specified system frame on the third carrier transmit broadcast information, and second Three consecutive system frames preceding the Q+1th specified system frame on the carrier transmit a broadcast message; three consecutive system frames before the Qth specified system frame are adjacent to the Qth specified system frame, and the Q+1th designation Three consecutive system frames before the system frame are adjacent to the Q+1th specified system frame; three consecutive system frames before the Qth specified system frame on the second carrier transmit system information, and the third carrier is Q+ The system information is transmitted by one specified system frame and four consecutive system frames before the Q+1th specified system frame; the first carrier is used to carry the first synchronization sequence; wherein Q is an integer greater than or equal to 1 and less than or equal to M.

Similarly, in the embodiment of the present invention, the length of the transport block is greater than or equal to 80 ms, and at least 8 system frames are included in one transport block, and 6 of the 8 system frames are used for transmitting the PBCH, and two subframes in the system frame are sent. PBCH, therefore, a transport block sends PBCH for at least 2*6=12ms. Taking N=8 as an example, the time for transmitting the PBCH in a PBCH transmission period is at least 12*8=96 ms. It can be seen that the embodiment of the present invention improves the transmission time of the PBCH, which is beneficial to improving the coverage performance of the PBCH.

With reference to the sixth aspect or any one of the possible implementation manners of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, t is equal to 40 ms.

提高了PBCH的覆盖性能。 It should be noted that when P=2, t=40ms, the length of the transport block is 160ms, and one PBCH transmission period includes eight transport blocks with a length of 160ms. A transport block includes 16 system frames, of which 12 system frames have PBCH transmission, and one system frame has two subframes for transmitting PBCH. That is to say, the transmission time of the PBCH in the prior art is: 2*12*8=192ms. For example, the SSS period is 40 ms. In the embodiment of the present invention, the PBCH is transmitted 192/64 times of the time of transmitting the PBCH in the prior art, that is, the gain of the coverage performance of the PBCH is compared with the prior art:

Improve the coverage performance of PBCH.

DRAWINGS

FIG. 1 is a schematic structural diagram of a communication network according to an embodiment of the present invention;

2 is a frame structure of a broadcast channel in an existing NB-IoT;

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

4 is a schematic flowchart of a channel sending method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a carrier according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of carrier spacing according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a frame of a first channel according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another frame of a first channel according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another frame of a first channel according to an embodiment of the present disclosure;

FIG. 10 is a block diagram showing another structure of a network device according to an embodiment of the present invention;

FIG. 11 is a block diagram showing another structure of a network device according to an embodiment of the present invention;

FIG. 12 is a structural block diagram of a terminal device according to an embodiment of the present invention;

FIG. 13 is a block diagram of another structure of a terminal device according to an embodiment of the present invention;

FIG. 14 is a block diagram of another structure of a terminal device according to an embodiment of the present invention.

detailed description

First, the terms "first", "second", and "third" in the embodiments of the present invention are used for descriptive purposes only, and are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. . Thus, features defining "first", "second", and "third" may include one or more of the features, either explicitly or implicitly.

1 is a structural diagram of a communication network according to an embodiment of the present invention. Referring to FIG. 1, a network device sends a DRS to a terminal device, where the DRS includes a PSS, an SSS, an SIB, and a PBCH. The terminal device can synchronize with the base station clock according to the PSS and the SSS, frequency synchronization, and then access the physical cell served by the network device according to the SIB and the PBCH, thereby communicating with the core network through the network device.

FIG. 2 is a frame structure of a broadcast channel in which a network device transmits a DRS in the prior art. Referring to FIG. 2, the broadcast channel of the existing NB-IoT occupies one resource block (RB) in the frequency domain, that is, the bandwidth of the broadcast channel is 180 kHz. Specifically, the PSS, SSS, PBCH, and SIB occupy the same carrier, and are time-divided with each other. The PBCH channel is transmitted in subframe 0 of each system frame, 8 system frames constitute one transport block, and there are 8 transport blocks in one PBCH period, so the period of the PBCH is 640 ms. Among them, a system frame has a length of 10 ms, including 10 subframes.

The FCC limits the unlicensed spectrum of the 902MHz-928MHz band as follows: When the channel bandwidth is less than 500KHZ, the network equipment needs to work in the frequency hopping mode to avoid large transmission interference. When the channel bandwidth is greater than or equal to 500 kHz, the network device can operate to transmit signals at a fixed frequency.

Referring to FIG. 2, the bandwidth of the broadcast channel in the prior art is less than 500 kHz, and the base station transmits the PSS, SSS, PBCH, and SIB on the same carrier, and does not adopt the frequency hopping mode. This is inconsistent with the band restrictions imposed by the US FCC regulations, which will result in the network device not directly applying the unlicensed spectrum to the DRS.

The embodiment of the present invention provides a channel sending method, where the network device determines the first information, where the first information (which may be DRS) includes broadcast information, a first synchronization sequence, a second synchronization sequence, and system information, and the terminal device may The first information accesses the network device. Further, the network device sends the first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, and the terminal device receives the first channel, and the terminal device can access the network device according to the first information. In addition, the bandwidth of the first channel is greater than or equal to 500 kHz. It can be seen that the network device sends a channel greater than or equal to 500 kHz to the terminal device at a fixed frequency point, which is consistent with the limitation of the frequency band by the US FCC regulations. Therefore, the network device can directly apply the unlicensed spectrum to the terminal device to send the DRS, so that the terminal device The network device can be accessed according to the information in the DRS. In addition, since the network device sends the DRS to the terminal device by using a fixed frequency point, the channel carrying the DRS does not perform frequency hopping, and the access delay of the terminal device is not increased.

The channel sending method provided by the embodiment of the present invention can be applied to a network device. Specifically, FIG. 3 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. The network device may be a network device in the architecture shown in FIG. As shown in FIG. 3, the network device can include at least one processor 11, memory 12, transceiver 13, and communication bus 14.

The following describes the components of the network device in detail with reference to FIG. 3:

The processor 11 is a control center of the network device, and may be a processor or a collective name of a plurality of processing elements. For example, the processor 11 is a central processing unit (CPU), may be an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. For example, one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

Among other things, the processor 11 can perform various functions of the network device by running or executing a software program stored in the memory 12 and calling data stored in the memory 12.

In a particular implementation, as an embodiment, processor 11 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG.

In a particular implementation, as an embodiment, the network device can include multiple processors, such as processor 11 and processor 15 shown in FIG. Each of these processors can be a single core processor (CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

The memory 12 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. The memory 12 can be stand-alone and connected to the processor 11 via a communication bus 14. The memory 12 can also be integrated with the processor 11.

The memory 12 is used to store a software program that executes the solution of the present invention, and is controlled by the processor 11.

The transceiver 13 uses a device such as any transceiver for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), Wireless Local Area Networks (WLAN), etc. . The transceiver 13 may include a receiving unit to implement a receiving function, and a transmitting unit to implement a transmitting function.

The communication bus 14 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 3, but it does not mean that there is only one bus or one type of bus.

The device structure shown in FIG. 3 does not constitute a limitation to the network device, and may include more or less components than those illustrated, or some components may be combined, or different component arrangements.

An embodiment of the present invention provides a channel sending method. As shown in FIG. 4, the method includes the following steps:

401. The network device determines first information, where the first information includes broadcast information, a first synchronization sequence, a second synchronization sequence, and system information, where the first information is used to indicate that the terminal device accesses according to the first information. Network equipment.

In a specific implementation, the network device has multiple serving cells in the coverage area, and the network device may send the first information to the terminal device, so that the terminal device accesses the network device. The first channel can also be considered as a broadcast channel for transmitting DRS.

Specifically, the first information may be regarded as a DRS, and the broadcast information may be regarded as information of a cell to which the terminal device is to be accessed, such as: a frame number, scheduling information of system information (eg, SIB1), system information update indication, etc., of course, This cell is the serving cell of the network device. In addition, the broadcast information may be carried in a Physical Broadcast Channel (PBCH).

The first synchronization sequence may be a PSS and the second synchronization sequence may be an SSS. The synchronization sequence is mainly used for clock synchronization, frequency synchronization, and the like between the terminal device and the network device.

System information can be considered as SIB and contains actual system information, such as timer/counter of the terminal device.

The network device sends a first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network device according to the first information. The bandwidth of the first channel is greater than or equal to 500 kHz.

In the embodiment of the present invention, the first channel can be divided into two parts in time: an fixed channel (Anchor Channel) and a data channel (Data channel). The fixed channel includes three carriers, and only performs downlink transmission, that is, the network device transmits broadcast information, a first synchronization sequence, a second synchronization sequence, and system information on a fixed channel, such as: PSS, SSS, PBCH, and SIB. In addition, the network device performs data transmission with the terminal device on the data channel. For example, the data channel may include a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a physical Uplink shared channel (Physical Uplink Share Channel, PUSCH).

It can be seen that, in the embodiment of the present invention, the network device can send information for access to the terminal device through the first channel with a bandwidth greater than 500 kHz at a fixed frequency point, which is consistent with the FCC specification for the unlicensed spectrum.

It should be noted that the frequency point can represent a fixed frequency band. Specifically, according to the frequency interval of 200 KHz, it can be divided into 125 radio frequency bands from 890 MHz, 890.2 MHz, 890.4 MHz, 890.6 MHz, 890.8 MHz, 891 MHz, 915 MHz, that is, the wireless spectrum is divided into 125 frequency bands, and each frequency band is performed. The number, for example, is numbered 1, 2, 3, 4...125. The frequency can be replaced by a frequency to specify the transmission frequency or reception frequency of the network device. For example, the frequency point of one carrier for the network device is 3, and the network device transmits the signal with the frequency corresponding to frequency 3 of 935.4 MHz.

In a specific implementation, the first channel includes three carriers, which are a first carrier, a second carrier, and a third carrier, respectively, and a sum of bandwidths of the first carrier, the second carrier, and the third carrier is less than or equal to a bandwidth of the first channel. Referring to FIG. 5, it is a schematic diagram of a distribution of a first carrier, a second carrier, and a third carrier in a frequency domain. Of course, in the embodiment of the present invention, the distribution of the first carrier, the second carrier, and the third carrier in the frequency domain is not limited to the mode shown in FIG. 5, and each carrier may be arranged according to the frequency of the frequency point: the first carrier, a third carrier, a second carrier, or a second carrier, a third carrier, or a first carrier; or a second carrier, a first carrier, a third carrier; or a third carrier, a first carrier, and a second carrier; Or a third carrier, a second carrier, and a first carrier.

It should be noted that, in the embodiment of the present invention, the bandwidth of the carrier may be the effective bandwidth of the carrier, or may be the sum of the effective bandwidth and the carrier spacing. The carrier spacing refers to the interval between two adjacent carriers in the frequency domain, such as: 15 kHz. Referring to FIG. 6, the carrier spacing between the first carrier and the second carrier is 15 kHz, and the bandwidth of the first carrier and the second carrier is 180 KHz, including the effective bandwidth and the carrier spacing of 7.5 KHz.

In some embodiments, when the bandwidth of the carrier is the effective bandwidth of the carrier, the bandwidth of the first carrier, the second carrier, and the third carrier is smaller than the bandwidth of the first channel; when the bandwidth of the carrier is the effective bandwidth of the carrier and the carrier spacing And, the bandwidth of the first carrier, the second carrier, and the third carrier is equal to the bandwidth of the first channel.

In the embodiment of the present invention, the distribution of the broadcast information, the first synchronization sequence, the second synchronization sequence, and the system information in the first channel may be implemented in the following two manners:

Manner 1: The first carrier is used to carry the first synchronization sequence, the second carrier is used to carry the broadcast message and the second synchronization sequence, and the third carrier is used to carry the system information. .

Manner 2: the first carrier is used to carry the first synchronization sequence, the second carrier is used to carry the second synchronization sequence, the broadcast message and the system information, and the third carrier is used for Carrying the system information and the broadcast message.

In addition, the system frame includes 10 subframes, and the first channel occupies the first two subframes of the system frame in the time domain, and the first channel is fixed in the preset three carriers in the frequency domain (ie, the embodiment of the present invention On the first carrier, the second carrier, and the third carrier, the data channel occupies the last eight subframes of each system frame in the time domain, and occupies one carrier in the frequency domain (eg, with the first carrier or the second carrier) One carrier of the carrier or the third carrier frequency division, the bandwidth may be 180 kHz, and the system frame is used as the basic time unit for frequency hopping.

403. The terminal device receives the first channel, and accesses the network device according to the first information.

In a specific implementation, the terminal first searches for the PSS on the first channel (that is, the first synchronization sequence in the embodiment of the present invention). For example, the PSS may be searched for on the first carrier of the first channel. Further, the terminal device can perform estimation and correction of time offset and frequency offset according to the PSS. After the PSS is searched, the terminal device can also search for the SSS (that is, the second synchronization sequence in the embodiment of the present invention) on the second carrier of the first channel. Further, the terminal device can determine the cell ID according to the PSS and the SSS. At the same time, according to the period of the SSS, the frame number information of the lower bit can be determined. For example, the period of the SSS is 20 ms, the terminal can determine the lowest 1 bit of the frame number after receiving the SSS; the period of the SSS is 40 ms, and the terminal is receiving the SSS. The lowest 2 bits of the frame number can then be determined. In addition, by blindly detecting the SSS, the terminal can obtain additional two bits of information.

It should be noted that the frame number information can be used to indicate the location of the system frame in one transport block. Specifically, it may be N bits, each bit having a value of 0 or 1, and the N bits may indicate 2 ^N system frames. For example, if the terminal obtains the 3-bit frame number information after receiving the SSS, the terminal can determine the position of the 8 frames, and the 8 system frames can be indicated by 3 bits, respectively, 000, 001, 010, 011, 100, 101, 110, 111, that is, the transport block of the broadcast channel (PBCH) may have a length of 80 ms.

Then, the terminal device may search for the PBCH on the second carrier of the first channel, obtain broadcast information, and finally search for the SIB on the third carrier of the first channel to determine system information. The broadcast information or the system information includes a channel list of the data channel, and the frequency hopping strategy of the data channel, such as the location of the time-frequency resource of the data channel, may be determined according to the PBCH or the SIB. At this point, the terminal device initially accesses the network device. After the terminal device initially accesses the network device, the terminal device communicates with the network device on the data channel.

In the embodiment of the present invention, the following two factors may be considered to determine the period of the synchronization sequence in the first channel and the period of the broadcast information, specifically:

(1) Referring to FIG. 1, the resource occupancy rate of PSS and SSS in the prior art is 2:1, and the PBCH coverage performance is not ideal. The resources occupied by the SSS can be further reduced to increase the resources occupied by the PBCH, thereby improving the PBCH coverage performance. In a specific implementation, the resource occupancy rate of the PSS and the SSS can be increased by increasing the SSS period, thereby reducing the resources occupied by the SSS. In the embodiment of the present invention, the resource occupancy rate of the PSS and the SSS is increased to 4:1. In the prior art, the period of the SSS is 20 ms, and the period of the SSS is not too long. Therefore, in the embodiment of the present invention, the period of the SSS is greater than 20 ms and less than or equal to 160 ms.

个比特指示一个周期内的SSS，也就是说可以指示在一个SSS周期内，某个SSS具体分布在哪个系统帧，即帧号信息的

个比特。另外，还可以通过正交序列隐式指示多个比特的信息，这些比特的全部或部分可以用来指示帧号信息，示例的，通过 正交序列隐式指示了2比特信息，UE在盲检测SSS后，可以获取2比特信息，2比特信息可以指示2比特的帧号信息，当然，也可以是2比特信息中的一个比特用于指示帧号信息。在本发明实施例中，P为1或2。因此，本发明实施例中帧号信息可以是

个比特，可以指示

个系统帧。 (2) Generally, assuming that the period of the SSS is t, and the SSS is distributed in units of time in the system frame, then it can pass

The bits indicate the SSS in a period, that is, it can indicate which system frame an SSS is specifically distributed in an SSS period, that is, the frame number information.

Bits. In addition, information of multiple bits may be implicitly indicated by an orthogonal sequence, and all or part of the bits may be used to indicate frame number information. For example, 2-bit information is implicitly indicated by an orthogonal sequence, and the UE is blindly detected. After the SSS, 2-bit information can be acquired, and the 2-bit information can indicate 2-bit frame number information. Of course, one bit of the 2-bit information can be used to indicate the frame number information. In the embodiment of the present invention, P is 1 or 2. Therefore, the frame number information in the embodiment of the present invention may be

Bits, can indicate

System frames.

个系统帧，又由于系统帧的长度为10ms，因此本发明实施例中传输块的长度为

t大于20ms小于等于160ms。 Based on this, the transport block in the embodiment of the present invention may include

The system frame, and the length of the system frame is 10 ms, so the length of the transport block in the embodiment of the present invention is

t is greater than 20ms and less than or equal to 160ms.

比特的帧号信息。 In other words, the terminal device can obtain low after blind detection of SSS.

Bit frame number information.

In the prior art, the period of the SSS is 20 ms, and the 1-bit frame number information is implicitly indicated by the period of the SSS, and the 2-bit frame number information is indicated by the orthogonal sequence design. Therefore, after the UE blindly detects the SSS, the frame number information of the lower 3 bits can be obtained. Therefore, the transmission block of one PBCH in the prior art is 80 ms.

In contrast, the embodiment of the present invention implicitly indicates 2-bit frame number information by the period of the SSS, and can indicate 2-bit frame number information by orthogonal sequence design. Therefore, after the UE blindly detects the SSS, the UE can obtain the frame number information of the lower 4 bits. In the embodiment, the length of the PBCH transport block is 160 ms, which improves the coverage capability of the PBCH by a factor of two.

In a specific implementation, referring to FIG. 7, the broadcast message corresponds to N transport blocks in the first channel, where the length of each transport block is (t*2 ^P ) ms, so the transmission period of the PBCH is t*2 ^P *N. In the embodiment of the present invention, t is a period of the second synchronization sequence. In the embodiment of the present invention, t is greater than 20 ms and less than or equal to 160 ms, and the N is an integer greater than or equal to 1.

Further, referring to FIG. 7, each transport block corresponds to M system frames; the M is equal to (t*2 ^P )/10, and the length of the system frame is 10 ms. It is to be noted that the M system frames corresponding to the i th transport block are earlier than the M system frames corresponding to the i+1th transport block, and the M system frames corresponding to the i th transport block and the first The M system frames corresponding to the i+1 transport blocks are adjacent in the time domain, and the i is an integer greater than or equal to 1 and less than or equal to N-1.

In some embodiments, the information distribution manner in the foregoing mode 1 is taken as an example, and the distribution of each information in the first channel mainly includes:

On the second carrier, the first two subframes of the xth system frame, the first two subframes of the x+1th system frame, and the x+2 system frame of the M system frames corresponding to each transport block The first two subframes are used to send the broadcast message; the x satisfies: xmod4=k, and the k is greater than or equal to 0 and less than or equal to 3 integers. It should be noted that, in FIG. 8, k=1, t=40 ms, and P=2 are taken as an example, that is, the length of the transport block is 160 ms, including 16 system frames, that is, N=16.

Referring to Figure 8, there are twelve system frames in each transport block that can be used to transmit broadcast information. For example, the first system frame, the second system frame, the third system frame, the fifth system frame, the sixth system frame, the seventh system frame, the ninth system frame, the tenth system frame The 11th system frame, the 13th system frame, the 14th system frame, and the 15th system frame are used to transmit broadcast information, that is, the PBCH channel is the second carrier in the frequency domain, and the system frames are in the time domain. The first two subframes.

In the implementation shown in FIG. 8, the first two subframes of the x+3th system frame in the M system frames corresponding to each transport block are used to send the second synchronization sequence on the second carrier. Referring to FIG. 3, the 4th system frame, the 8th system frame, the 12th system frame, and the 16th system frame are used to transmit the second synchronization sequence SSS. That is, the SSS channel is the second carrier in the frequency domain, and the fourth system frame, the eighth system frame, the twelfth system frame, and the first two subframes of the 16th system frame of each transport block in the time domain. .

In addition, the first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry the system message.

In some embodiments, the information distribution manner in the foregoing mode 2 is taken as an example, and the distribution of each information in the first channel mainly includes:

Referring to FIG. 9, on the second carrier, the first two subframes of the specified system frame in the M system frames corresponding to each transport block are used to send the second synchronization sequence. The specified system frame is the x+3th system frame in the M system frames, and the x satisfies: xmod4=k, and the k is greater than or equal to 0 and less than or equal to 3 integers. Specifically, the first two subframes of the specified system frame are used to transmit the second synchronization sequence SSS.

It should be noted that, in FIG. 9, k=1, t=40 ms, and P=2 are taken as an example, that is, the length of the transport block is 160 ms, including 16 system frames, that is, N=16.

In a specific implementation, three consecutive system frames preceding the Qth specified system frame on the third carrier transmit broadcast information PBCH, and three consecutive system frames before the Q+1th specified system frame on the second carrier Transmitting the broadcast message; three consecutive system frames preceding the Qth specified system frame are adjacent to the Qth specified system frame, and the third consecutive system frame before the Q+1th specified system frame Adjacent to the Q+1th specified system frame.

Transmitting system information SIB on three consecutive system frames preceding the Qth specified system frame on the second carrier, before the Q+1th specified system frame on the third carrier and before the Q+1th specified system frame Four consecutive system frames send system messages. Wherein Q is an integer greater than or equal to 1 and less than or equal to M.

That is to say, in each SSS period, the system message SIB and the broadcast information PBCH are alternately transmitted on the second carrier and the third carrier, so that the coverage performance of the second carrier and the third carrier can be improved.

For example, referring to FIG. 9, the system frame is designated as the 4th system frame, the 8th system frame, the 12th system frame, and the 16th system frame.

The first specified system frame is the fourth system frame, and the PBCH is transmitted in three consecutive system frames before the fourth system frame on the third carrier, that is, the frequency domain position of the transmitted PBCH is the third carrier, and the time domain position is the first 1 system frame, 2nd system frame, 3rd system frame. Specifically, the PBCH may be transmitted in the first two subframes of the system frame. The SIB is transmitted in three consecutive system frames before the fourth system frame on the second carrier, that is, the frequency domain position of the transmitting SIB is the second carrier, and the time domain position is the first system frame, the second system frame, and the third System frames.

The second specified system frame is the 8th system frame, and the PBCH is transmitted in three consecutive system frames before the 8th system frame on the second carrier, that is, the frequency domain position of the transmitted PBCH is the second carrier, and the time domain position is the first 5 system frames, 6th system frame, 7th system frame. Specifically, the PBCH may be transmitted in the first two subframes of the system frame. The SIB is transmitted in the 8th system frame on the third carrier and the four consecutive system frames before the 8th system frame, that is, the frequency domain position of the transmitting SIB is the third carrier, and the time domain position is the 4th system frame, the 5th. System frame, 6th system frame, 7th system frame, and 8th system frame.

The third designated system frame is the 12th system frame, and the PBCH is transmitted in three consecutive system frames before the 12th system frame on the third carrier, that is, the frequency domain position of the transmitting PBCH is the third carrier, and the time domain position is the first 9 system frames, 10th system frame, 11th system frame. Specifically, the PBCH may be transmitted in the first two subframes of the system frame. The SIB is transmitted in three consecutive system frames before the twelfth system frame on the second carrier, that is, the frequency domain position of the transmitting SIB is the second carrier, and the time domain position is the ninth system frame, the tenth system frame, and the eleventh System frames.

The fourth designated system frame is the 16th system frame, and the PBCH is transmitted in three consecutive system frames before the 16th system frame on the second carrier, that is, the frequency domain position of the transmitting PBCH is the second carrier, and the time domain position is the first 9 system frames, 10th system frame, 11th system frame. Specifically, the PBCH may be transmitted in the first two subframes of the system frame. The SIB is transmitted in the 16th system frame on the third carrier and the four consecutive system frames before the 16th system frame, that is, the frequency domain position of the transmitting SIB is the third carrier, and the time domain position is the 12th system frame, the 13th. System frame, 14th system frame, 15th system frame, and 16th system frame.

It should be noted that, in the embodiment of the present invention, a certain system frame transmission information (such as: SSS, PSS, SIB, PBCH, etc.) may be considered to be sent in the first two subframes of the system frame. Certainly, the embodiment of the present invention does not limit the specific subframe in which the information is sent in the system frame, and may also send the foregoing information through other subframes in the system frame.

Taking the implementation shown in Figure 8 as an example, the access process of the terminal device includes the following steps:

Step (1): The terminal device first searches for the PSS on the pre-configured first channel. For example, the first synchronization sequence, such as the PSS, may be searched for on the first carrier of the first channel. Further, the terminal device can perform estimation and correction of time offset and frequency offset according to the PSS.

Step (2): After the terminal device searches for the PSS, the terminal device searches for the SSS on the second carrier of the first channel (that is, the second synchronization sequence in the embodiment of the present invention), and further, the terminal device can determine according to the PSS and the SSS. Cell ID and 4-bit frame number information.

Step (3): The terminal device searches for the PBCH on the second carrier of the first channel to obtain a broadcast message.

Step (4): The terminal device searches for the SIB on the third carrier of the first channel to acquire a system message.

At this point, the terminal device accesses the network device, and the subsequent terminal device can communicate with the network device on the data channel.

Referring to FIG. 2, the PBCH transmission period in the prior art is 640 ms, including eight transport blocks having a length of 80 ms. One transport block includes 8 system frames, and one system frame has one subframe to transmit PBCH. That is to say, the transmission time of the PBCH in the prior art is: 1*8*8=64ms.

Referring to FIG. 8 or FIG. 9, the PBCH transmission period in the embodiment of the present invention is 1280 ms, and includes eight transport blocks having a length of 160 ms. A transport block includes 16 system frames, 12 of which are transmitted by PBCH, and two of the system frames are sent by PBCH. That is to say, the transmission time of the PBCH in the prior art is: 2*12*8=192ms.

In contrast, in the method provided by the embodiment of the present invention, the coverage of the PBCH is significantly improved, and the SSS period is 40 ms. In the embodiment of the present invention, the time for transmitting the PBCH is 192/64 times that of the prior art. Further, the coverage performance of the PBCH in the method provided by the embodiment of the present invention is: log ₁₀ ^(192/64) = 4.8 dB compared with the prior art, which improves the coverage performance of the PBCH.

FIG. 10 shows a possible structural diagram of the network device involved in the foregoing embodiment in the case where the respective functional modules are divided by corresponding functions. As shown in FIG. 10, the network device includes a determining unit 1001 and a transmitting unit 1002.

a determining unit 1001 for supporting the network device to perform step 401 in the above embodiments, and/or other processes for the techniques described herein;

The sending unit 1002 is configured to support the network device to perform step 402 in the foregoing embodiment, and/or other processes for the techniques described herein;

It should be noted that all the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

Exemplarily, in the case of adopting an integrated unit, a schematic structural diagram of a network device provided by an embodiment of the present application is shown in FIG. 11. In FIG. 11, the network device includes a processing module 1101 and a communication module 1102. The processing module 1101 is configured to control and manage the actions of the network device, for example, perform the steps performed by the determining unit 1001 described above, and/or other processes for performing the techniques described herein. The communication module 1102 is configured to support interaction between the network device and other devices, such as performing the steps performed by the sending unit 1002. As shown in FIG. 11, the network device may further include a storage module 1103 for storing program codes and data of the network device.

When the processing module 1101 is a processor, the communication module 1102 is a transceiver, and the storage module 1103 is a memory, the network device is the network device shown in FIG.

FIG. 12 is a schematic diagram showing a possible structure of the terminal device involved in the foregoing embodiment, in the case where the respective functional modules are divided by corresponding functions. As shown in FIG. 12, the terminal device includes a receiving unit 1201 and a processing unit 1202.

The receiving unit 1201 is configured to support the terminal device to perform a related process of receiving the first channel in step 403 in the foregoing embodiment, and/or other processes for the techniques described herein;

The processing unit 1202 is configured to support the terminal device to perform related processes of accessing the network device in step 403 in the foregoing embodiment, and/or other processes for the techniques described herein;

It should be noted that all the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

Exemplarily, in the case of using an integrated unit, a schematic structural diagram of a terminal device provided by an embodiment of the present application is shown in FIG. In FIG. 13, the terminal device includes a processing module 1301 and a communication module 1302. The processing module 1301 is for controlling management of actions of the terminal device, for example, performing the steps performed by the processing unit 1202 described above, and/or other processes for performing the techniques described herein. The communication module 1302 is configured to support interaction between the terminal device and other devices, such as performing the steps performed by the receiving unit 1201. As shown in FIG. 13, the terminal device may further include a storage module 1303, where the storage module 1303 is configured to store program codes and data of the terminal device.

When the processing module 1301 is a processor, the communication module 1302 is a transceiver, and the storage module 1303 is a memory, the terminal device is the terminal device shown in FIG. As shown in FIG. 14, referring to FIG. 14, the network device may include at least one processor 1401, a memory 1402, a transceiver 1403, and a communication bus 1404. The processor 1401, the memory 1402, and the transceiver 1403 are connected by a communication bus 1404.

The following describes the components of the network device in detail with reference to FIG. 14:

The processor 1401 is a control center of the network device, wherein the processor 1401 can perform various functions of the network device by running or executing a software program stored in the memory 1402 and calling data stored in the memory 1402.

In a particular implementation, as an embodiment, processor 1401 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG.

The network device may include multiple processors, such as processor 1401 and processor 1405 shown in FIG. Each of these processors can be a single core processor (CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more network devices, circuits, and/or processing cores for processing data, such as computer program instructions.

The transceiver 1403 uses a network device such as any transceiver for communication between other devices, such as communication with the terminal device. Of course, the transceiver 1403 can also be used to communicate with a communication network.

The network device structure illustrated in FIG. 14 does not constitute a limitation to the network device, and may include more or less components than those illustrated, or some components may be combined, or different component arrangements.

The embodiment of the present invention further provides a computer readable storage medium having instructions stored therein; when the computer readable storage medium is run on the terminal device shown in FIG. 12, FIG. 13, and FIG. 14, The terminal device performs the channel transmission method shown in FIG.

The embodiment of the present invention further provides a computer readable storage medium having instructions stored therein, including: instructions stored in the computer readable storage medium; and when the computer readable storage medium is in FIG. 3 and FIG. And when operating on the network device shown in FIG. 11, the network device is caused to perform the channel transmission method shown in FIG.

The embodiment of the present invention further provides a wireless communication device, wherein the wireless communication device stores instructions; when the wireless communication device operates on the terminal device shown in FIG. 12, FIG. 13, and FIG. 14, the wireless communication device is configured to perform FIG. The channel transmission method shown. The wireless communication device can be a chip.

The embodiment of the present invention further provides a wireless communication device, where the wireless communication device stores instructions; when the wireless communication device operates on the network device shown in FIG. 3, FIG. 10, and FIG. The channel transmission method shown in 4. The wireless communication device can be a chip.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated according to needs. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. The combination may be integrated into another device, or some features may be ignored or not performed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in the form of a software product in the form of a software product in essence or in the form of a contribution to the prior art, and the software product is stored in a storage medium. A number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims (12)

A channel sending method, comprising: The network device determines first information, where the first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and a system message, where the first information is used to indicate that the terminal device accesses the network according to the first information. device; The network device sends a first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network device according to the first information. The bandwidth of the first channel is greater than 500 kHz. The method according to claim 1, wherein the first channel comprises a first carrier, a second carrier, and a third carrier; and a bandwidth of the first carrier, the second carrier, and the third carrier The sum is less than or equal to the bandwidth of the first channel; The broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , the t is a period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms. The N is an integer greater than or equal to 1, and P is 1 or 2; The transport block corresponds to M system frames; the M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the first of the M system frames on the second carrier The first two subframes of the x system frames, the first two subframes of the x+1th system frame, and the first two subframes of the x+2 system frames are used to transmit the broadcast message; the x satisfies: xmod4= k, the k is greater than or equal to 0 and less than or equal to 3 integers; M system frames corresponding to the i-th transport block of the N transport blocks are earlier than M system frames corresponding to the i+1th transport block of the N transport blocks, and the ith transmission The M system frames corresponding to the block are adjacent to the M system frames corresponding to the (i+1)th transport block in the time domain, and the i is an integer greater than or equal to 1 and less than or equal to N-1. The method according to claim 2, wherein the first two subframes of the x+3th system frame in the M system frames on the second carrier are used to send the second synchronization sequence, The first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry the system message. The method according to claim 1, wherein the first channel comprises a first carrier, a second carrier, and a third carrier; and a bandwidth of the first carrier, the second carrier, and the third carrier The sum is less than or equal to the bandwidth of the first channel; The broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , the t is a period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms. The N is an integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; the M is equal to (t*2 ^P )/10, and the length of the system frame is 10 ms; The first two subframes of the specified system frame in the M system frames on the second carrier are used to send the second synchronization sequence; the specified system frame is the x+ in the M system frames 3 system frames, the x satisfies: xmod4=k, and the k is greater than or equal to 0 and less than or equal to 3 integers; The M system frames corresponding to the i-th transport block are earlier than the M system frames corresponding to the (i+1)th transport block, and the M system frames corresponding to the i-th transport block are The M system frames corresponding to the i+1th transport block are adjacent in the time domain, and the i is an integer greater than or equal to 1 and less than or equal to N-1. The method of claim 4 wherein: Transmitting the broadcast information by three consecutive system frames preceding the Qth specified system frame on the third carrier, and transmitting, by the three consecutive system frames before the Q+1th specified system frame on the second carrier Broadcasting message; three consecutive system frames preceding the Qth specified system frame are adjacent to the Qth specified system frame, and the third consecutive system frame before the Q+1th specified system frame is The Q+1th specified system frame is adjacent; Transmitting the system information by three consecutive system frames preceding the Qth specified system frame on the second carrier, the Q+1th specified system frame on the third carrier, and the Q+1th designated system Transmitting the system message by four consecutive system frames preceding the frame; The first carrier is used to carry the first synchronization sequence; Wherein Q is an integer greater than or equal to 1 and less than or equal to M. A method according to any one of claims 1 to 5, wherein said t is equal to 40 ms. A network device, comprising: a determining unit, configured to determine first information, where the first information includes a broadcast message, a first synchronization sequence, a second synchronization sequence, and a system message, where the first information is used to indicate that the terminal device accesses according to the first information The network device; a sending unit, configured to send a first channel to the terminal device at a fixed frequency point, where the first channel is used to carry the first information, so that the terminal device accesses the network according to the first information The device; the bandwidth of the first channel is greater than 500 kHz. The network device according to claim 7, wherein the first channel comprises a first carrier, a second carrier, and a third carrier; and the first carrier, the second carrier, and the third carrier The sum of the bandwidths is less than or equal to the bandwidth of the first channel; The broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , the t is a period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms. The N is an integer greater than or equal to 1, and P is 1 or 2; The transport block corresponds to M system frames; the M is equal to (t*2 ^P )/10, the length of the system frame is 10 ms; and the first of the M system frames on the second carrier The first two subframes of the x system frames, the first two subframes of the x+1th system frame, and the first two subframes of the x+2 system frames are used to transmit the broadcast message; the x satisfies: xmod4= k, the k is greater than or equal to 0 and less than or equal to 3 integers; M system frames corresponding to the i-th transport block of the N transport blocks are earlier than M system frames corresponding to the i+1th transport block of the N transport blocks, and the ith transmission The M system frames corresponding to the block are adjacent to the M system frames corresponding to the (i+1)th transport block in the time domain, and the i is an integer greater than or equal to 1 and less than or equal to N-1. The network device according to claim 8, wherein the first two subframes of the x+3th system frame of the M system frames on the second carrier are used to send the second synchronization sequence The first carrier is used to carry the first synchronization sequence, and the third carrier is used to carry the system message. The network device according to claim 7, wherein the first channel comprises a first carrier, a second carrier, and a third carrier; and the first carrier, the second carrier, and the third carrier The sum of the bandwidths is less than or equal to the bandwidth of the first channel; The broadcast message corresponds to N transport blocks, the length of the transport block is t*2 ^P , the t is a period of the second synchronization sequence, and the period of the second synchronization sequence is greater than 20 ms and less than or equal to 160 ms. The N is an integer greater than or equal to 1, P is 1 or 2; the transport block corresponds to M system frames; the M is equal to (t*2 ^P )/10, and the length of the system frame is 10 ms; The first two subframes of the specified system frame in the M system frames on the second carrier are used to send the second synchronization sequence; the specified system frame is the x+ in the M system frames 3 system frames, the x satisfies: xmod4=k, and the k is greater than or equal to 0 and less than or equal to 3 integers; The M system frames corresponding to the i-th transport block are earlier than the M system frames corresponding to the (i+1)th transport block, and the M system frames corresponding to the i-th transport block are The M system frames corresponding to the i+1th transport block are adjacent in the time domain, and the i is an integer greater than or equal to 1 and less than or equal to N-1. A network device according to claim 10, wherein Transmitting the broadcast information by three consecutive system frames preceding the Qth specified system frame on the third carrier, and transmitting, by the three consecutive system frames before the Q+1th specified system frame on the second carrier Broadcasting message; three consecutive system frames preceding the Qth specified system frame are adjacent to the Qth specified system frame, and the third consecutive system frame before the Q+1th specified system frame is The Q+1th specified system frame is adjacent; Transmitting the system information by three consecutive system frames preceding the Qth specified system frame on the second carrier, the Q+1th specified system frame on the third carrier, and the Q+1th designated system Transmitting the system message by four consecutive system frames preceding the frame; The first carrier is used to carry the first synchronization sequence; Wherein Q is an integer greater than or equal to 1 and less than or equal to M. A network device according to any of claims 7-11, wherein said t is equal to 40 ms.

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