CN109218991B

CN109218991B - Signal transmission method, base station, terminal and communication system

Info

Publication number: CN109218991B
Application number: CN201710526027.8A
Authority: CN
Inventors: 尤肖虎; 汪茂; 刘亚林; 张军; 孙军平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2021-04-20
Anticipated expiration: 2037-06-30
Also published as: WO2019001134A1; CN109218991A

Abstract

The application provides a signal transmission method, a base station, a terminal and a communication system, wherein the signal transmission method comprises the following steps: a base station determines a sending period of a system signal sent by the base station, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals; and the base station sends the system signal according to the sending period, and sends a deep coverage signal after sending the system signal every at least one sending period, wherein the deep coverage signal and the system signal carry the same broadcast information. The method and the device can improve the detection performance of the terminal on the broadcast information and improve the signal coverage depth.

Description

Signal transmission method, base station, terminal and communication system

Technical Field

The present application relates to communication technologies, and in particular, to a signal transmission method, a base station, a terminal, and a communication system.

Background

The Internet of Things (IoT) can link sensors, controllers, machines, people and objects together in a new way by using communication technologies such as local networks or the Internet, so as to form networks for people and objects, and realize informatization, remote management and control and intellectualization.

In the internet of things, communication environments of different devices may be different. Due to business requirements, some devices need to be configured in some scenes with shielding and shielding, such as deep in a building, underground and the like. However, occlusion and masking, etc., make these scenes signal coverage holes. In the signal coverage blind area, the transmission strength of the signal is generally weak, which makes the coverage of the signal in the internet of things smaller. Currently, a terminal can increase a Transmission Time Interval (TTI) of a system signal by accumulating the system signal scattered in a plurality of periods, thereby improving the Transmission strength of the system signal to achieve wide coverage.

However, in the internet of things, the frequency offset of the device usually causes a time drift (timing drift), and the longer the accumulation time of the signal is, the more serious the time drift is, which causes the terminal to greatly reduce the performance of detecting the broadcast information in the system signal, and it is difficult to ensure the deep coverage of the signal.

Disclosure of Invention

The application provides a signal transmission method, a base station, a terminal and a communication system, which are used for improving the detection performance of the terminal on broadcast information and improving the coverage depth of signals.

In a first aspect, the present application provides a signal transmission method, including:

a base station determines a transmission period of a system signal transmitted by the base station, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals;

the base station sends the system signal according to the sending period, and sends a deep coverage signal after sending the system signal every at least one sending period, wherein the deep coverage signal and the system signal carry the same broadcast information.

In the method, a base station sends a deep coverage signal after sending a system signal every other at least one sending period, and the deep coverage signal and the system signal carry the same broadcast information, so that the effective time length of the broadcast information in a certain time period is increased, the total energy of the broadcast information is increased to effectively resist the penetration loss in the transmission process, and the coverage depth is deepened; in addition, due to the increase of the time length of the broadcast information in a certain time period, the broadcast information can be obtained without blind detection, combined decoding in a period accumulation mode and other operations of the terminal, the time drift caused by the frequency offset of the terminal is effectively reduced, the demodulation complexity of the terminal for the broadcast information is reduced, the detection performance of the terminal for the broadcast information is effectively ensured, and the signal coverage depth is improved.

In addition, in the method, the total energy of the broadcast information is increased, the signal coverage depth is improved, and meanwhile, the signal coverage width can be improved; because no additional equipment needs to be constructed in the method, the method can effectively save the cost of the Internet of things for network deployment.

In the method, after the system signal is sent every at least one sending period, the deep coverage signal is sent, so that the deep coverage signal can appear every at least one sending period, and the overhead of the system can be effectively ensured under the condition of ensuring the signal coverage depth.

In an implementation form of the first aspect, the deep-coverage signal and the system signal are continuous in time.

The deep coverage signal and the system signal are continuous in time, so that the transmission of the broadcast information carried by the deep coverage signal and the system signal is more concentrated, the time drift caused by the frequency offset of the equipment is effectively shortened, and the demodulation complexity of the terminal to the broadcast information is more effectively reduced.

In another implementation form of the first aspect, the deep coverage signal may include a system signal and/or a processed system signal. The processed system signal may be a signal obtained by performing at least one of conjugation processing, scrambling processing, and the like on the system signal by the base station.

In yet another implementation form of the first aspect, the deep coverage signal includes at least one of the system signal and at least one of the processed system signal, and the deep coverage signal is continuous in time.

In yet another implementation form of the first aspect, the deep coverage signal includes at least two processed system signals, and the deep coverage signal is continuous in time.

In yet another implementation form of the first aspect, the deep coverage signal as described above may comprise at least two of the system signals, the deep coverage signal being consecutive in time.

In a further implementation manner of the first aspect, the processed system signal is a signal obtained by scrambling the system signal by the base station.

In a further implementation manner of the first aspect, the system signal may further include: transmitting mode indication information indicating a current transmission mode.

In yet another implementation form of the first aspect, the system signal includes at least one of: primary synchronization signal PSS, secondary synchronization signal SSS and signals of the physical broadcast channel PBCH.

In a second aspect, the present application further provides a signal transmission method, including:

a first terminal receives a system signal and a deep coverage signal sent by a base station, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the plurality of terminals, the deep coverage signal is sent by the base station every other at least one sending period after the system signal is sent, and the deep coverage signal and the system signal carry the same broadcast information;

the first terminal demodulates the system signal and the deep coverage signal to obtain the broadcast information.

In an implementation form of the second aspect, the deep coverage signal comprises the system signal and/or the processed system signal. The processed system signal may be a signal obtained by performing at least one of conjugation processing, scrambling processing, and the like on the system signal by the base station.

In another implementation form of the second aspect, the deep coverage signal is temporally continuous with the system signal.

In yet another implementation manner of the second aspect, the deep coverage signal includes at least one system signal and at least one processed system signal, and the deep coverage signal is continuous in time.

In yet another implementation manner of the second aspect, the deep coverage signal includes at least two processed system signals, and the deep coverage signal is continuous in time.

In yet another implementation form of the second aspect, the deep coverage signal as described above may comprise at least two of the system signals, the deep coverage signal being consecutive in time.

In a further implementation manner of the second aspect, the processed system signal is a signal obtained by scrambling the system signal by the base station.

In a further implementation manner of the second aspect, the system signal may further include: transmitting mode indication information indicating a current transmission mode.

In yet another implementation form of the second aspect, the system signal comprises at least one of: primary synchronization signal PSS, secondary synchronization signal SSS and signals of the physical broadcast channel PBCH.

In a third aspect, the present application further provides a base station, including:

a determining module, configured to determine a transmission period in which the base station transmits a system signal, where the system signal is a signal broadcast by the base station to multiple terminals;

and the sending module is used for sending the system signal according to the sending period and sending a deep coverage signal after sending the system signal every at least one sending period, wherein the deep coverage signal and the system signal carry the same broadcast information.

In an implementable form of the third aspect, the deep-coverage signal and the system signal are contiguous in time.

In another implementation form of the third aspect, the deep coverage signal comprises the system signal and/or the processed system signal.

In a fourth aspect, the present application further provides a terminal, which is a first terminal, including:

a receiving module, configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcasted by the base station to multiple terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the multiple terminals, the deep coverage signal is sent by the base station every other at least one sending period after the system signal is sent, and the deep coverage signal and the system signal carry the same broadcast information;

and the demodulation module is used for demodulating the system signal and the deep coverage signal to obtain the broadcast information.

In an implementable manner of the fourth aspect, the deep coverage signal may comprise the system signal and/or the processed system signal.

In a fifth aspect, the present application further provides a base station, comprising: a processor and a transmitter; the processor is connected with the transmitter;

a processor, configured to determine a transmission period in which the base station transmits a system signal, where the system signal is a signal broadcast by the base station to a plurality of terminals;

and the transmitter is used for transmitting the system signal according to the transmission period and transmitting a deep coverage signal after the system signal is transmitted every at least one transmission period, and the deep coverage signal and the system signal carry the same broadcast information.

In an implementable form of the fifth aspect, the deep-coverage signal and the system signal are contiguous in time.

In another implementation form of the fifth aspect, the deep coverage signal comprises the system signal and/or the processed system signal.

In a sixth aspect, the present application further provides a terminal, which is a first terminal, including: a receiver and a processor; the receiver is connected with the processor;

a receiver, configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcasted by the base station to multiple terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the multiple terminals, the deep coverage signal is sent by the base station every other at least one sending period after the system signal is sent, and the deep coverage signal and the system signal carry the same broadcast information;

and the processor is used for demodulating the system signal and the deep coverage signal to obtain the broadcast information.

In an implementable manner of the sixth aspect, the deep coverage signal may comprise the system signal and/or the processed system signal.

In a seventh aspect, the present application further provides a communication system, comprising: a base station and at least one terminal; the base station is respectively connected with each terminal;

wherein, the base station is any one of the base stations; the at least one terminal includes: at least one terminal as described above.

In an eighth aspect, an embodiment of the present application further provides a computer program product, where the computer program product includes program code for executing any one of the signal transmission methods provided in the first aspect of the embodiment of the present application.

In a ninth aspect, embodiments of the present application further provide a computer-readable storage medium for storing a computer program product, the computer program product including: program code, which may include program code for performing any of the signal transmission methods provided in the first aspect of the embodiments of the present application;

when the computer program product runs on a computer, the computer can be caused to execute any one of the signal transmission methods provided by the first aspect of the embodiments of the present application.

In a tenth aspect, the present application embodiment further provides a computer program product, where the computer program product includes program code for executing any signal transmission method provided in the second aspect of the present application embodiment.

In an eleventh aspect, embodiments of the present application further provide a computer-readable storage medium for storing a computer program product, where the computer program product includes: program code which may include code for performing any of the signal transmission methods provided by the second aspect of the embodiments of the present application described above;

when the computer program product runs on a computer, the computer can be caused to execute any one of the signal transmission methods provided by the second aspect of the embodiments of the present application.

According to the signal transmission method, the base station, the terminal and the communication system provided by the embodiment of the application, the base station can determine the sending period of the sending system signal, the system signal is a signal broadcasted by the base station to a plurality of terminals, the base station also sends the system signal according to the sending period, and sends the deep coverage signal after sending the system signal every at least one sending period, and the deep coverage signal and the system signal carry the same broadcast information. In the method, the base station sends the deep coverage signal after sending the system signal every at least one sending period, the deep coverage signal and the system signal carry the same broadcast information, thereby increasing the effective time length of the broadcast information, increasing the total energy of the broadcast information, effectively resisting the penetration loss in the transmission process, deepening the coverage depth, obtaining the broadcast information without carrying out blind detection and merging decoding and other operations in a period accumulation mode, effectively avoiding time-drift caused by terminal frequency offset, reducing the demodulation complexity of the broadcast information by the terminal, and effectively ensuring the detection performance of the broadcast information by the terminal.

Drawings

Fig. 1 is a scene structure diagram of an internet of things as an electric power energy source to which the embodiment of the present application is applied;

fig. 2 is a scene structure diagram of a farm internet of things to which the embodiment of the present application is applied;

fig. 3 is a first flowchart of a signal transmission method according to an embodiment of the present application;

fig. 4 is a second flowchart of a signal transmission method according to an embodiment of the present application;

fig. 5 is a third flowchart of a signal transmission method according to an embodiment of the present application;

fig. 6 is a diagram illustrating a correspondence relationship between system signals in different transmission modes in a signal transmission method according to an embodiment of the present application;

fig. 7 is a fourth flowchart of a signal transmission method according to an embodiment of the present application;

fig. 8 is a fifth flowchart of a signal transmission method according to an embodiment of the present application;

fig. 9 is a first schematic structural diagram of a base station according to an embodiment of the present application;

fig. 10 is a first schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication system according to an embodiment of the present application.

Detailed Description

The signal transmission method, the base station, the terminal and the communication system provided by the following embodiments of the present application can be applied to the scene of the internet of things, for example, the scene of the internet of things of energy, the scene of the internet of farm, and the like. The network architecture and the like in the scene of the internet of things are described as follows by taking the scene of the physical power energy network and the scene of the internet of things of the intelligent farm respectively as an example.

Fig. 1 is a scene structure diagram of an electric power energy internet of things to which the embodiment of the application is applied. Fig. 1 is an example of an internet of things of electric energy sources, and the internet of things of electric energy sources shown in fig. 1 can also be called a smart grid. As shown in fig. 1, in the internet of things of electric energy, at least one base station can be configured at each substation, and the base station of each substation can establish wireless connection with a terminal within the range of the base station of each substation. The terminal in the range of the base station of each transformer substation can be connected with the electric meters of the resident users through the centralized electricity utilization information system terminal. The base station of each transformer substation is also connected with a core network of a power supply building, and the core network is also connected with network management equipment. The ammeter of the resident user can send the electricity utilization condition of the resident user to the terminal through the centralized electricity utilization information system terminal, the terminal sends the electricity utilization condition to the base station, and then the base station sends the electricity utilization condition to the network management equipment through the core network equipment, so that remote automatic meter reading is realized, manual door-to-door meter reading is not needed, and manpower resources are effectively saved.

The user also can know power consumption and electric power expense through the equipment in this electric power energy thing networking, like the ammeter, changes power consumption mode and custom according to the information of knowing to also can realize long-range payment electric power expense, convenient and fast. The network management equipment can also monitor the electricity utilization condition in the basement environment through the power energy Internet of things, timely early warning is carried out when potential safety hazards exist, and timely detection and reporting are carried out when faults exist, so that unattended operation can be realized, and a convenient and safe monitoring management system is realized. The electric power operating system can realize remote starting or power-off service, and dangerous conditions are avoided.

In the power energy internet of things shown in fig. 1, the communication environments of distribution network equipment are usually different greatly, and most of the ring main units and the power distribution cabinets are located at low positions below a building or in basements. Some monitoring devices may also be located in basements or where there are walls and obstructions to block and shield the devices. The signal transmission method provided by implementing the following embodiments can effectively improve the signal coverage depth in the electric energy Internet of things.

Fig. 2 is a scene structure diagram of a farm internet of things to which the embodiment of the present application is applied. Fig. 2 is an example of a farm internet of things, and the farm internet of things shown in fig. 2 can also be called an intelligent farm. The intelligent farm shown in fig. 2 can realize precise management of agricultural production and strict control on product quality safety, and can greatly save human resources, reduce cost and protect environment. In an intelligent farm, sensors for monitoring the soil are located in the soil. When it detects insufficient humidity, it needs to establish a connection with a base station, such as a network device on the system side, to transmit an irrigation request. In addition, sensors for monitoring products (such as red wine, grains and the like) in the farm are also positioned in the shade with the products, and network equipment on the system side can realize automatic temperature adjustment through the detection of storage temperature by the sensors. For those locations in the basement or where there are walls and obstacles to block and shield, coverage holes need to be resolved. The sensor can be used as a terminal to establish wireless connection with a base station. The signal transmission method provided by implementing the following embodiments can effectively improve the coverage depth of signals in the farm internet of things.

It should be noted that, the number of base stations included in the scene of the internet of things shown in fig. 1 or fig. 2 and the number of terminals 102 served by each base station are deployed according to actual network requirements. This is not particularly limited in the present application.

The terminal shown in fig. 1 or fig. 2 may be a device providing data connectivity to a user, a handheld device having wireless connection capability, or a wireless device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Device (User Device), or User Equipment (User Equipment), a smartphone (smartphone), an autonomous Device, or an Internet Of Things Device (Internet Of Things).

The base station shown in fig. 1 or 2 may be a form of radio station, which refers to a radio transceiver station for information transfer between a mobile telephone terminal and a mobile communication switching center in a certain radio coverage area; or may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The access network device may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The access network device may also coordinate management of attributes for the air interface. For example, the Base Station may be any one of a 2G Base Station (BTS), a 3G Base Station (NodeB), an evolved Node B (eNB), and the like, and the present application is not limited thereto.

The signal transmission method provided by the embodiments of the present application is described in detail below with reference to a plurality of examples.

Fig. 3 is a first flowchart of a signal transmission method according to an embodiment of the present application. As shown in fig. 3, the signal transmission method may include:

s301, the base station determines a transmission period of the base station for transmitting a system signal, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals.

The transmission period in which the base station transmits the system signal may also be referred to as a transmission period of the system signal. The system signal is a system signal in a conventional transmission mode or a standard transmission mode. The plurality of terminals may be a plurality of terminals within the coverage of the base station.

S302, the base station sends the system signal according to the sending period, and sends a deep coverage signal after sending the system signal every at least one sending period, wherein the deep coverage signal and the system signal carry the same broadcast information.

Specifically, the system signal is a signal broadcasted by the base station to a plurality of terminals, that is, the base station may send the system signal to the plurality of terminals in a broadcast manner according to the sending period and send the deep coverage signal to the plurality of terminals in a broadcast manner after sending the system signal every at least one sending period.

The specific number of at least one of the transmission periods may be determined by the base station according to a transmission mode required by the plurality of terminals. If the transmission modes required by the plurality of terminals are deep coverage transmission modes, the base station needs to determine at least one transmission period under the condition of determining the transmission period. If the transmission mode required by the plurality of terminals is other transmission modes except the deep coverage transmission mode, the base station does not need to send the deep coverage signal after sending the system signal every at least one sending period, and the base station only needs to send the system signal according to the sending period. Wherein the other transmission mode may be a standard transmission mode, a legacy transmission mode, or a non-overlay transmission mode.

Since the deep-coverage signal carries the same broadcast information as the system signal, the deep-coverage signal may also be referred to as a correlation signal of the system signal.

The deep coverage signal is also transmitted after the system signal is transmitted every at least one transmission period, and the deep coverage signal and the system signal carry the same broadcast information, so that the effective time length of the broadcast information can include the time length of the system signal and the time length of the deep coverage signal every at least one transmission period, thereby increasing the effective time length of the broadcast information in a certain time period, such as the time period of at least one transmission period.

Correspondingly, at the receiving end of the signal, i.e. the terminal side, the method may further include:

and S303, the first terminal receives the system signal and the deep coverage signal sent by the base station.

The system signal is a signal broadcasted by the base station to a plurality of terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the plurality of terminals, the deep coverage signal is sent by the base station after the system signal is sent every other at least one sending period, and the deep coverage signal and the system signal carry the same broadcast information.

The first terminal may perform signal search in the signals transmitted by the base station according to at least one of the transmission periods, and if a signal occurring in at least one of the transmission periods is searched, it searches for the system signal and the deep coverage signal, that is, the first terminal may receive the system signal and the deep coverage signal transmitted by the base station.

For example, the first terminal may perform signal search on a signal transmitted by a base station, obtain a signal transmitted by the base station within a time period of a sum of time lengths of the system signal and the deep coverage signal, and demodulate the signal, and if the demodulation is successful, the first terminal may receive the system signal and the deep coverage signal transmitted by the base station.

S304, the first terminal demodulates the system signal and the deep coverage signal to obtain the broadcast information.

The first terminal may demodulate the system signal and the deep coverage signal to obtain the broadcast information when receiving the system signal and the deep coverage signal. Because the broadcast information usually appears periodically, and the system signal and the deep coverage signal both carry the same broadcast information and at least one sending period appears as a new period, a certain time period is added in the method, such as the effective time length of the broadcast information in the new period where the at least one sending period is located, so that the terminal can obtain the broadcast information without performing operations such as blind detection, merging and decoding in a period accumulation manner and the like. Wherein, the effective time length of the broadcast information may include: the time length of the system signal and the time length of the deep coverage signal.

In the signal transmission method provided in the embodiment of the present application, a base station may determine a sending period of a system signal sent by the base station, where the system signal is a signal broadcasted by the base station to a plurality of terminals, and sends the system signal according to the sending period, and sends a deep coverage signal after sending the system signal every other at least one sending period, where the deep coverage signal and the system signal carry the same broadcast information. In the method, a base station sends a deep coverage signal after sending a system signal every other at least one sending period, and the deep coverage signal and the system signal carry the same broadcast information, so that the effective time length of the broadcast information in a certain time period is increased, the total energy of the broadcast information is increased to effectively resist the penetration loss in the transmission process, and the coverage depth is deepened; in addition, due to the increase of the time length of the broadcast information in a certain time period, the broadcast information can be obtained without blind detection, combined decoding in a period accumulation mode and other operations of the terminal, the time drift caused by the frequency offset of the terminal is effectively reduced, the demodulation complexity of the terminal for the broadcast information is reduced, the detection performance of the terminal for the broadcast information is effectively ensured, and the signal coverage depth is improved.

On the basis of the above method, the deep-coverage signal and the system signal as shown above may be continuous in time.

That is, every other transmission period, the base station can directly transmit the deep-coverage signal without a time delay after transmitting the system signal.

In an alternative embodiment, the deep coverage signal may include: the system signal, and/or the processed system signal. The broadcast information carried by the processed system signal is unchanged, and is the same as the broadcast information carried by the system signal before processing. The processed system signal may be a signal obtained by processing the system signal by a base station. The processing may include: performing at least one process of conjugation process, scrambling process, etc.

That is, the deep coverage signal may include the system signal itself, may also include the processed system signal, and may also ensure the system signal itself and the processed system signal.

If the deep coverage signal includes: the processed system signal can avoid the terminal from detecting the error of the deep coverage signal as the system signal.

Optionally, the system signal may include at least one of the following: primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH) signals, among others.

In another alternative embodiment, the deep coverage signal may include at least one of the system signals and at least one of the processed system signals, the deep coverage signal being continuous in time. The broadcast information carried by each processed system signal is unchanged, and is the same as the broadcast information carried by the system signal before processing.

In this embodiment, if the deep-coverage signal includes at least one of the system signals, the deep-coverage signal is effectively a repetition of at least one of the system signals; if the deep coverage signal comprises at least one processed system signal, the deep coverage signal is actually a repetition of the at least one processed system signal; if the deep coverage signal includes: at least one system signal and at least one processed system signal, the deep coverage signal includes: the repetition of the system signal also comprises the repetition of the processed system signal.

The deep coverage signal is continuous in time, which means that the deep coverage signal includes at least one system signal in which adjacent system signals are continuous in time, and at least one processed system signal in which adjacent signals are continuous in time, and the system time is continuous in time with the processed system signal.

For example, if the system signal includes: PSS, the deep coverage signal may then include: and at least one processed PSS, wherein each processed PSS is the same and is a signal obtained by processing the PSS by a base station.

If the system signal includes: SSS and/or PBCH, the deep coverage signals may include: the base station comprises at least one processed SSS and/or PBCH signal, wherein each processed SSS and/or PBCH signal can be obtained by processing partial signals in the SSS and/or PBCH by the base station respectively.

In yet another alternative embodiment, the deep coverage signal comprises at least two processed system signals, the deep coverage signal being continuous in time. The broadcast information carried by each processed system signal is unchanged, and is the same as the broadcast information carried by the system signal before processing.

In this embodiment, the deep coverage signal may actually be a repetition of at least two processed system signals. The deep coverage signal is continuous in time, which may refer to: at least two of the processed system signals have adjacent signals that are temporally consecutive.

In other alternative embodiments, the deep coverage signal may include at least two of the system signals, the deep coverage signal being continuous in time.

That is, in this embodiment, the deep coverage signal may actually be a repetition of at least two system signals. The deep coverage signal is continuous in time, which may refer to: the deep coverage signal comprises at least two system information, wherein adjacent system signals are continuous in time.

For any optional embodiment described above, the processed system signal may be a signal obtained by scrambling the system signal by the base station.

Optionally, in order to enable the terminal to accurately receive the system signal and the deep coverage information sent by the base station, the system signal as shown above may include: transmitting mode indication information indicating a current transmission mode.

Specifically, the transmission mode indication information may be located in a preset bit in the system signal. The preset bits may include at least one bit. The preset bit may be a reserved bit in the system signal or a newly added bit in the system signal. The transmission mode indication information has different bit values, and can be used for indicating different transmission modes.

Taking a bit as an example, if the value of the bit of the transmission mode indication information is 1, the transmission mode indication information may be used to indicate that the current transmission mode is the deep coverage transmission mode. Otherwise, if the bit value of the transmission mode indication information is 0, the transmission mode indication information may be used to indicate that the current transmission mode is a standard transmission mode or a conventional transmission mode.

Optionally, fig. 4 is a second flowchart of a signal transmission method provided in the embodiment of the present application. As shown in fig. 4, in the method as described above, before the base station transmits the system signal according to the transmission period and transmits the deep coverage signal after transmitting the system signal every at least one transmission period in S302, the method may further include:

s401, the base station determines whether the environment information of the positions of the plurality of terminals includes: and deeply covering scene information.

The environment information of the locations of the plurality of terminals may be determined according to information such as a current network deployment scenario. The deep coverage scene information may include, for example: the scene information of basement, sheltering from the environment, shielding environment, etc.

S402, if the environment information of the locations of the plurality of terminals includes: and the base station determines the transmission modes required by the plurality of terminals to be deep-coverage transmission modes according to the deep-coverage scene information.

If the environment information of the position of at least one terminal in the plurality of terminals comprises: the base station may determine that the transmission mode required by the plurality of terminals is a deep-coverage transmission mode, and may configure the transmission mode as the deep-coverage transmission mode.

The base station configures the transmission mode to the deep coverage transmission mode, and the base station may transmit the system signal according to the transmission period and transmit the deep coverage signal after transmitting the system signal every at least one transmission period in S302.

The base station may further configure a transmission mode indication in the system signal when the transmission mode is configured as the deep coverage transmission mode, so that the transmission mode indication information may be used to indicate that the current transmission mode is the deep coverage transmission mode.

Optionally, the method may further include:

s403, if the environment information of the locations of the plurality of terminals does not include: and the base station determines the transmission modes required by the plurality of terminals as other transmission modes according to the deep coverage scene information.

If the environmental information of the positions of all the terminals in the plurality of terminals does not include: the base station may determine that the transmission modes required by the plurality of terminals are other transmission modes, and thus the transmission mode may be configured as the other transmission mode without configuring the deep coverage transmission mode.

The base station may further configure a transmission mode indication in the system signal under the condition that the transmission mode is configured as the other transmission mode, so that the transmission mode indication information may be used to indicate that the current transmission mode is the other transmission mode.

If the base station determines that the transmission modes required by the plurality of terminals are other transmission modes, the system signal can be sent according to the sending period, and the deep coverage signal does not need to be sent after the system signal is sent every other sending period.

According to the method, the current transmission mode can be determined according to the environment information of the position of the terminal, namely the deployment environment information of the terminal, and the flexible setting of the transmission mode is realized.

The embodiment of the application also provides a signal transmission method. Fig. 5 is a third flowchart of a signal transmission method according to an embodiment of the present application. Fig. 6 is a diagram illustrating a correspondence relationship between system signals in different transmission modes in a signal transmission method according to an embodiment of the present application. The signal transmission method may be exemplified by the information transmission method performed by the base station in fig. 3 or fig. 4 described above by specific examples. As shown in fig. 5, the signal transmission method may include:

s501, the base station determines whether the environmental information of the positions of the plurality of terminals includes: and deeply covering scene information.

S502, if the environment information of the locations of the plurality of terminals includes: and the base station determines the transmission modes required by the plurality of terminals to be deep-coverage transmission modes according to the deep-coverage scene information.

S503, the base station configures the current transmission mode into a deep coverage transmission mode, and configures the transmission mode indication information into indication information corresponding to the deep coverage transmission mode.

S504, the base station determines the sending period of the system signal, sends the system signal to a plurality of terminals in a broadcasting mode according to the sending period, and sends the deep coverage signal after sending the system signal every other at least one sending period; wherein the deep-coverage signal carries the same broadcast information as the system signal, the deep-coverage signal and the system signal being consecutive in time, the system signal comprising: and indicating information corresponding to the deep coverage transmission mode.

The broadcast information in the deep-coverage signal may be, for example, an integer multiple of the broadcast information in the system signal. If the broadcast information in the deep-coverage signal can be 15 times of the broadcast information in the system signal, for example, the broadcast information carried by the system signal and the deep-coverage signal can be 16 times of the broadcast information in the system signal.

The base station sends the system signal according to the sending period, so that the system signal appears periodically by taking the sending period as a unit; the system signal and the deep coverage signal are transmitted every at least one transmission period, so that the deep coverage occurs periodically in units of at least one transmission period.

S505, if the environment information of the locations of the plurality of terminals does not include: and the base station determines the transmission modes required by the plurality of terminals as other transmission modes according to the deep coverage scene information.

Wherein the other transmission mode may be a non-deep-coverage transmission mode, a standard transmission mode, or a legacy transmission mode.

S506, the base station configures the current transmission mode into other transmission modes and configures the transmission mode indication information into indication information corresponding to the other transmission modes.

S507, the base station determines a transmission period of a system signal, and transmits the system signal to a plurality of terminals in a broadcast manner according to the transmission period, where the system signal includes: he transmits an indication corresponding to the mode.

As shown in fig. 6, the signals transmitted every at least one transmission period may include the system signal and the deep coverage system signal. The system signal and the deep coverage signal are temporally continuous.

The deep coverage signal may include: at least one of the system signals after scrambling processing can make the broadcast information carried by the deep coverage signal include at least one of the broadcast information included in the system signal. And the broadcast information carried by each system signal after scrambling processing is unchanged, and is the same as the broadcast information carried by the system signal before scrambling processing.

Each scrambled system signal is a signal obtained by scrambling the system signal by the base station.

After the system signal is transmitted every other transmission period, a deep coverage signal is also transmitted, thus increasing YdB the total energy of the broadcast information for deep coverage. Meanwhile, the deep coverage signal may include: at least one system signal after scrambling processing can avoid the deep coverage signal being falsely detected as the system signal. Under the condition that the signal transmission power and the channel are not changed, the time length of the transmitted signal is increased by 1 time, so that the energy of the received signal is also increased by 1 time, namely increased by 3 dB. It is assumed that the sum of the time lengths of the system signal and the deep-coverage signal is 2 of the time length of the system signal^mThe sum of the time lengths of the broadcast information carried in the system signal and the deep-coverage signal can be made 2 times the time length of the broadcast information carried in the system signal^mAnd multiplying the result by the value of Y, wherein Y is m.3 dB. If the system signal supports a path loss of XdB, the method of the present application may enable the system signal and the deep coverage signal to support a path loss of X + YdB.

For example, if the deep coverage signal includes 15 scrambled system signals, the system signalThe sum of the time length of the systematic signal and the deep coverage signal can be 2 times the time length of the systematic signal⁴The supportable path loss can be increased by a factor of 12 dB. If the path loss supported by the system signal is XdB, the method of the present application may enable the path loss supported by the system signal and the deep coverage signal to be X +12 dB.

In the method, the increase of the time length of the broadcast information can ensure that the terminal can obtain the broadcast information without blind detection, combined decoding in a period accumulation mode and other operations, thereby effectively reducing the time drift caused by the frequency offset of the terminal, reducing the demodulation complexity of the broadcast information by the terminal and effectively ensuring the detection performance of the terminal on the broadcast information.

Optionally, after the first terminal demodulates the system signal and the deep-coverage signal in S304 shown in fig. 3 to obtain the broadcast information, the method may further include:

the first terminal sends a random access signal to the base station on a first access resource in a deep coverage transmission mode.

Specifically, after the first terminal demodulates the received system signal and the deep coverage to obtain the broadcast information, it may determine that the current transmission mode is the deep coverage transmission mode, and then the first terminal may send a random access signal to the base station on the first access resource to implement random access.

The Access resource in the deep coverage transmission mode may be a Physical Random Access Channel (PRACH) Access resource, and the Random Access signal may be a PRACH signal.

Since the first terminal receives both the system signal and the deep coverage signal, the system signal and the deep coverage signal sent by the base station can implement both signal transmission of the terminal in the standard transmission mode or the conventional transmission mode and system signal transmission of the terminal in the deep coverage transmission mode, and therefore, the access resource in the deep coverage transmission mode may include: two parts, a first access resource and a second access resource. The first access resource may be an access resource of the terminal in the deep coverage transmission mode, and the second access resource may be an access resource of the terminal in another transmission mode, such as a standard transmission mode or a conventional transmission mode.

Optionally, the method may further include:

and the first terminal and the base station carry out data transmission in the first transmission mode.

Specifically, the first terminal may perform data transmission with the base station according to the preset data repetition number, so as to improve transmission energy of the data signal. That is, the first terminal may transmit data to the base station according to the preset data repetition number and receive data transmitted by the base station according to the preset data repetition number. And the base station can schedule the data transmission and the data reception of the first terminal. The preset number of data repetitions may be determined according to configuration information sent by the base station.

Optionally, on the basis of the signal transmission method described in any one of fig. 3 to fig. 5, an embodiment of the present application further provides a signal transmission method. Fig. 7 is a fourth flowchart of a signal transmission method according to an embodiment of the present application. As shown in fig. 7, before the first terminal receives the system signal and the deep coverage signal transmitted by the base station in S303, the method further includes:

s701, the first terminal searches the system signal sent by the base station according to the time length of the system signal.

Specifically, the first terminal may first perform signal search in the signals transmitted by the base station according to the transmission period, and if the signals appearing in the transmission period are searched, the first terminal searches the system signals; if the signal appearing in the transmission period is not searched, the first terminal does not search the system signal.

For example, the first terminal may perform signal search on a signal transmitted by the base station to obtain a signal transmitted by the base station within the time duration of the system signal, and demodulate the signal. If the demodulation is successful, the first terminal can determine that the system signal is searched. If the demodulation fails, the first terminal can determine that the system signal is not searched.

S702, if the system signal is not searched, the first terminal searches the system signal and the deep coverage signal sent by the base station according to the sum of the time lengths of the system signal and the deep coverage signal.

If the signal appeared in at least one sending period is searched, the first terminal searches the system signal and the deep coverage signal, namely the first terminal receives the system signal and the deep coverage signal sent by the base station.

For example, the first terminal may perform signal search on a signal transmitted by the base station, obtain a signal transmitted by the base station in a time period of a sum of time lengths of the system signal and the deep coverage signal, and demodulate the signal. If the demodulation is successful, the first terminal can determine that the system signal and the deep-coverage signal are searched. If demodulation fails, the first terminal may determine that the system signal and the deep-coverage signal are not searched.

Optionally, the method may further include:

s703, if the system signal is found, the first terminal determines the transmission mode indication information in the system signal.

The first terminal may determine the transmission mode indication information according to a value of a predetermined bit in the system signal.

S704, if the transmission mode indication information is indication information corresponding to the deep coverage transmission mode, the first terminal determines that the current transmission mode is the deep coverage transmission mode.

Specifically, if the value of the bit in which the transmission mode indication information is located is the bit value corresponding to the deep coverage transmission mode, the first terminal may determine that the current transmission mode is the deep coverage transmission mode. If the bit value of the transmission mode indication information is a bit value corresponding to another transmission mode, such as a standard transmission mode or a conventional transmission mode, the first terminal may determine that the current transmission mode is the indication information corresponding to the other transmission mode.

For example, if the value of the bit in which the transmission mode indication information is located is bit 1, the first terminal may determine that the current transmission mode is a deep coverage transmission mode; if the value of the bit of the transmission mode indication information is bit 0, the first terminal may determine that the current transmission mode is another transmission mode.

Optionally, the method may further include:

and the first terminal sends a random access signal to the base station on the second access resource in the deep coverage transmission mode.

The access resources in the deep coverage transmission mode may include: a first access resource and a second access resource. The first access resource may be an access resource of a terminal in a deep coverage transmission mode, and the second access resource may be an access resource of a terminal in another transmission mode.

Optionally, the method may further include:

s705, if the transmission mode indication information is indication information corresponding to another transmission mode, the first terminal determines that the current transmission mode is another transmission mode.

Optionally, the method may further include:

the first terminal sends a random access signal to the base station on the access resource in the other transmission mode.

Since the system signal is transmitted in the other transmission mode, the system signal is actually transmitted only according to the transmission period, and only the signal transmission of the terminal in the other transmission mode can be realized, the access resource in the other transmission mode may include: a part of the access resources, which can be only the access resources of the terminal in the other transmission mode.

The signal transmission method provided by the embodiment of the application can provide multiple implementation modes for determining the transmission mode, so that the terminal can determine the current transmission mode by searching the received signal, then flexibly select the corresponding access resource according to the current transmission mode to send the random access signal to the base station, and then perform data transmission.

The embodiment of the application also provides a signal transmission method. Fig. 8 is a fifth flowchart of a signal transmission method according to an embodiment of the present application. The signal transmission method may be exemplified by specific examples of the signal transmission method performed by the first terminal shown in fig. 3 or fig. 7 described above. As shown in fig. 8, the signal transmission method may include:

s801, the first terminal searches for the PSS in the signal sent by the base station according to the time length of the system signal.

The first terminal may perform signal search on a signal transmitted by the base station to obtain a signal transmitted by the base station within a time duration of the system signal, and perform PSS demodulation on the signal. If the demodulation is successful, the first terminal may determine to search for the PSS. If the demodulation fails, the first terminal may determine that the PSS is not searched.

S802, if the PSS is not searched, the first terminal determines that the current transmission mode is the deep coverage transmission mode.

If the PSS is not searched, the first terminal continues to perform the following S803-S806.

S803, the first terminal searches for the deep-coverage PSS in the signal transmitted by the base station according to the sum of the time lengths of the system signal and the deep-coverage signal.

The first terminal may perform signal search on a signal transmitted by the base station, obtain a signal transmitted by the base station in a time period of a sum of time lengths of the system signal and the deep coverage signal, and perform PSS demodulation on the signal. If the demodulation is successful, the first terminal may determine to search for a deep-coverage PSS. If the demodulation fails, the first terminal may determine that the deep-coverage PSS is not searched.

The deeply covered PSS may include: at least one PSS after scrambling processing, broadcast information carried by each PSS after scrambling processing is inconvenient and is the same as broadcast information carried by the PSS before scrambling processing.

If the first terminal searches for the deep-covered PSS in S803, the following S804 to S806 are continuously performed.

S804, the first terminal receives the deep-coverage SSS and the deep-coverage PBCH signals sent by the base station according to the sum of the time lengths of the system signals and the deep-coverage signals.

S805, the first terminal sends a random access signal to the base station on the first access resource in the deep coverage transmission mode.

S806, the first terminal and the base station transmit data in a deep coverage transmission mode.

Specifically, the first terminal may transmit data to the base station using the deep coverage transmission mode, and receive data transmitted by the base station using the deep coverage transmission mode.

S807, if the PSS is searched, the first terminal receives the SSS and PBCH signals sent by the base station according to the time length of the system signal.

S808, the first terminal determines the transmission mode indication information in the PBCH signal.

If the transmission mode indication information is indication information corresponding to the deep coverage transmission mode, the first terminal continues to execute the following S809-S811.

If the transmission mode indication information is indication information corresponding to other transmission modes, the first terminal continues to perform the following S812-S814.

And step S809, if the transmission mode indication information is indication information corresponding to the deep coverage transmission mode, the first terminal determines that the current transmission mode is the deep coverage transmission mode.

And S810, the first terminal sends a random access signal to the base station on the second access resource in the deep coverage transmission mode.

S811, the first terminal and the base station perform data transmission in the other transmission mode.

S812, if the transmission mode indication information is indication information corresponding to another transmission mode, the first terminal determines that the current transmission mode is another transmission mode.

S813, the first terminal sends a random access signal to the base station on the access resource in the other transmission mode.

S814, the first terminal and the base station perform data transmission in the other transmission mode.

The embodiment of the application also provides a base station. The base station may perform the method performed by the base station in the signal transmission method described in any of fig. 3 to 5 above. Fig. 9 is a first schematic structural diagram of a base station according to an embodiment of the present application. As shown in fig. 9, the base station 900 may include: a determining module 901 and a sending module 902.

A determining module 901, configured to determine a transmission period in which the base station transmits a system signal, where the system signal is a signal broadcast by the base station to multiple terminals.

A sending module 902, configured to send the system signal according to the sending period, and send a deep coverage signal after sending the system signal every at least one sending period, where the deep coverage signal and the system signal carry the same broadcast information.

Optionally, the deep coverage signal and the system signal are continuous in time as shown above.

Optionally, the deep coverage signal as shown above comprises the system signal and/or the processed system signal.

Optionally, the deep coverage signal as shown above comprises at least one of the system signal and at least one of the system signal after processing, the deep coverage signal being continuous in time.

Optionally, the deep coverage signal as shown above comprises at least two processed system signals, said deep coverage signal being continuous in time.

Optionally, the deep coverage signal comprises at least two of the system signals, the deep coverage signal being continuous in time.

Optionally, the deep coverage signal may include: the processed system signal is a signal obtained by scrambling the system signal by the base station.

Optionally, the system signal includes at least one of the following signals: PSS, SSS, and PBCH.

The method performed by the base station in the signal transmission method described in any one of fig. 3 to fig. 5 may be performed by the base station according to the embodiment of the present application, and specific implementation processes and beneficial effects thereof are described above and are not described herein again.

The embodiment of the application also provides a terminal. The terminal may perform the method performed by the first terminal in the signal transmission methods described above in fig. 3, fig. 7, or fig. 8. Fig. 10 is a first schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 10, terminal 1000 can be a first terminal that can include: a receiving module 1001 and a demodulation module 1002.

A receiving module 1001, configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcasted by the base station to multiple terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the multiple terminals, the deep coverage signal is sent by the base station every other at least one sending period after sending the system signal, and the deep coverage signal and the system signal carry the same broadcast information.

The demodulation module 1002 is configured to demodulate the system signal and the deep coverage signal to obtain the broadcast information.

The terminal provided in the embodiment of the present application may execute the method executed by the first terminal in the signal transmission method described in any one of fig. 3, fig. 7, or fig. 8, and specific implementation processes and beneficial effects thereof are described above and are not described herein again.

The embodiment of the application also provides a base station. The base station may perform the method performed by the base station in the signal transmission method described in any of fig. 3 to 5 above. Fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present application. As shown in fig. 11, the base station 1100 may include: a processor 1101 and a transmitter 1102. The processor 1101 is connected to a transmitter 1102.

A processor 1101, configured to determine a transmission period in which the base station transmits a system signal, where the system signal is a signal broadcast by the base station to a plurality of terminals.

A transmitter 1102, configured to transmit the system signal according to the transmission period, and transmit a deep coverage signal after transmitting the system signal every at least one transmission period, where the deep coverage signal and the system signal carry the same broadcast information.

Optionally, an embodiment of the present application may further provide a computer program product, where the computer program product includes a program code for executing the signal transmission method executed by the base station shown in any one of fig. 3 to fig. 5.

When the computer program product runs on a computer, the computer can be caused to execute the signal transmission method executed by the base station shown in any one of fig. 3 to 5.

Optionally, an embodiment of the present application may further provide a computer-readable storage medium, where the storage medium is used to store a computer program product, where the computer program product includes: program code. The program code may include program code for performing the signal transmission method performed by the base station shown in any of fig. 3 to 5 described above.

The computer-readable storage medium may be an internal memory in the base station 1100 shown in fig. 11 or an external memory connected to the base station 1100 shown in fig. 11. The program code in the computer program product may be executed by the processor 1101 in the base station 1100 shown in fig. 11 described above, for example.

The base station, the computer program product, and the computer-readable storage medium provided in this embodiment of the present application may execute the method performed by the base station in the signal transmission method described in any one of fig. 3 to fig. 5, and specific implementation processes and beneficial effects thereof are referred to above, and are not described herein again.

The embodiment of the application also provides a terminal. The terminal may perform the method performed by the first terminal in the signal transmission methods described above in fig. 3, fig. 7, or fig. 8. Fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 12, the terminal 1200 may include: a receiver 1201 and a processor 1202; the receiver 1201 is connected to the processor 1202.

A receiver 1201, configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcasted by the base station to a plurality of terminals covered by the base station according to a sending period, the sending period is a period in which the base station sends the system signal, the first terminal is any one of the plurality of terminals, the deep coverage signal is sent by the base station every other at least one sending period after sending the system signal, and the deep coverage signal and the system signal carry the same broadcast information.

A processor 1202 for demodulating the system signal and the deep-coverage signal to obtain the broadcast information.

Optionally, an embodiment of the present application may further provide a computer program product, where the computer program product includes program codes for executing the signal transmission method executed by the first terminal shown in fig. 3, fig. 7, or fig. 8.

When the computer program product runs on a computer, the computer can be caused to execute the signal transmission method executed by the first terminal shown in fig. 3, fig. 7 or fig. 8.

Optionally, an embodiment of the present application may further provide a computer-readable storage medium, where the storage medium is used to store a computer program product, where the computer program product includes: program code. The program code may include program code for performing a signal transmission method performed by the terminal shown in any one of fig. 7 to 9 described above.

When the computer program product runs on a computer, the computer can be caused to execute the signal transmission method executed by the terminal shown in any one of the above-mentioned fig. 3, fig. 7 or fig. 8.

The computer-readable storage medium may be an internal memory in the terminal 1200 shown in fig. 12 or an external memory connected to the terminal 1200 shown in fig. 12. The program code in the computer program product may be executed by the processor 1202 in the terminal 1200 shown in fig. 12 described above, for example.

The terminal, the computer program product, and the computer-readable storage medium provided in the embodiment of the present application may execute the signal transmission method executed by the terminal in fig. 3, fig. 7, or fig. 8, and specific implementation processes and beneficial effects thereof are referred to above, and are not described herein again.

The present application may also provide a communication system. Fig. 13 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 13, the communication system may include: a base station 1301 and at least one terminal 1302; a base station 1301 is connected to each terminal 1302 separately. The base station 1301 can be wirelessly connected to each terminal 1302, respectively.

Wherein, the base station 1301 is the base station described in fig. 9 or fig. 11; at least one terminal 1302 includes: at least one terminal as described above with reference to fig. 10 or 12.

In the communication system provided in the embodiment of the present application, the base station may execute the signal transmission method executed by the base station in the signal transmission method described in any one of fig. 3 to fig. 5, and the terminal may execute the signal transmission method executed by the terminal in fig. 3, fig. 7, or fig. 8.

It should be noted that, in the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A signal transmission method, comprising:

a base station determines a sending period of a system signal sent by the base station, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals;

the base station sends the system signal according to the sending period, and sends a deep coverage signal after sending the system signal every at least one sending period, wherein the deep coverage signal and the system signal carry the same broadcast information, the deep coverage signal comprises the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time.

2. The method of claim 1, wherein the deep-coverage signals include at least one of the system signals and at least one of the system signals after processing, the deep-coverage signals being continuous in time.

3. The method of claim 1, wherein the deep-coverage signal comprises at least two processed system signals, the deep-coverage signal being continuous in time.

4. The method of claim 1, wherein the deep-coverage signal comprises at least two of the system signals, the deep-coverage signal being continuous in time.

5. The method of claim 1, wherein the system signal comprises at least one of: primary synchronization signal PSS, secondary synchronization signal SSS and signals of the physical broadcast channel PBCH.

6. A signal transmission method, comprising:

a first terminal receives a system signal and a deep coverage signal transmitted by a base station, wherein the system signal is a signal broadcasted by the base station to a plurality of terminals covered by the base station according to a transmission period, the transmission period is a period in which the base station transmits the system signal, the first terminal is any one of the plurality of terminals, said deep-coverage signal being transmitted by said base station after transmission of said system signal every at least one of said transmission periods, the deep coverage signal carries the same broadcast information as the system signal, the deep coverage signal comprises the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time;

and the first terminal demodulates the system signal and the deep coverage signal to obtain the broadcast information.

7. A base station, comprising:

a sending module, configured to send the system signal according to the sending period, and send a deep coverage signal after sending the system signal every other at least one sending period, where the deep coverage signal and the system signal carry the same broadcast information, the deep coverage signal includes the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time.

8. A terminal, wherein the terminal is a first terminal, comprising:

a receiving module, configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcast by the base station to multiple terminals covered by the base station according to a sending period, the transmission period is a period in which the base station transmits the system signal, the first terminal is any one of the plurality of terminals, said deep-coverage signal being transmitted by said base station after transmission of said system signal every at least one of said transmission periods, the deep coverage signal carries the same broadcast information as the system signal, the deep coverage signal comprises the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time;

9. A base station, comprising: a processor and a transmitter; the processor is connected with the transmitter;

the processor is configured to determine a transmission period in which the base station transmits a system signal, where the system signal is a signal broadcast by the base station to a plurality of terminals;

the transmitter is configured to transmit the system signal according to the transmission period, and transmit a deep coverage signal after the system signal is transmitted every at least one transmission period, where the deep coverage signal and the system signal carry the same broadcast information, the deep coverage signal includes the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time.

10. A terminal, wherein the terminal is a first terminal, comprising: a receiver and a processor; the receiver is connected with the processor;

the receiver is configured to receive a system signal and a deep coverage signal sent by a base station, where the system signal is a signal broadcast by the base station to a plurality of terminals covered by the base station according to a transmission cycle, the transmission period is a period in which the base station transmits the system signal, the first terminal is any one of the plurality of terminals, said deep-coverage signal being transmitted by said base station after transmission of said system signal every at least one of said transmission periods, the deep coverage signal carries the same broadcast information as the system signal, the deep coverage signal comprises the system signal and/or the processed system signal, the processed system signal is a signal obtained by scrambling the system signal by the base station, and the deep coverage signal and the system signal are continuous in time;

the processor is configured to demodulate the system signal and the deep coverage signal to obtain the broadcast information.

11. A communication system, comprising: a base station and at least one terminal; the base station is respectively connected with each terminal;

wherein the base station is the base station of claim 9; the at least one terminal comprises: at least one terminal as claimed in claim 10.