Signal transmission method and device, and computer storage medium

Abstract

The present application discloses a signal transmission method and device, and a computer storage medium, the method comprising: a terminal device determines a synchronization signal transmission mode on a first carrier, the synchronization signal transmission mode is a first transmission mode or a second transmission mode; the terminal device receives information on the first carrier according to the synchronization signal transmission mode. A network device determines a synchronization signal transmission mode on a first carrier, the synchronization signal transmission mode is a first transmission mode or a second transmission mode; the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a signal transmission method and device, and a computer storage medium. Background Art

[0002] With the development of wireless communication technology, the Licensed-Assisted Access-LTE (LAA-LTE) system based on the Long Term Evolution (LTE) system is based on the carrier aggregation structure, with the carrier on the licensed spectrum as the main carrier, and the carrier on the unlicensed spectrum as the auxiliary carrier to provide services to the terminal device. In the LAA-LTE system, the main carrier can be used to ensure the initial access of the terminal device and the transmission performance of some key services, while the auxiliary carrier on the unlicensed spectrum can be used to transmit non-critical big data services of the terminal device, thereby achieving the purpose of balancing the LTE cell load.

[0003] During the downlink signal transmission process in the LAA-LTE system, the network equipment needs to send a discovery reference signal (DRS) on the unlicensed carrier, so that the terminal equipment of this cell can complete the synchronization with the cell on the unlicensed carrier, and the terminal equipment of the neighboring cell can complete the radio resource management (RRM) measurement of the signal of this cell. Among them, the DRS in the LTE system includes the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the cell-specific reference signal (CRS). Optionally, DRS can also include a channel state information reference signal (CSI-RS).

[0004] like Figure 1As shown, taking DRS including PSS, SSS and CRS as an example, the transmission of DRS in the LAA-LTE system is explained. In the unlicensed spectrum, after the network device detects and obtains the channel use right through the Listen Before Talk (LBT) principle, it can send DRS within the discovery signal measurement time configuration (DMTC) window configured by the network device for the terminal device. Among them, if DRS is transmitted together with channels such as physical downlink shared channel (PDSCH, Physical Downlink Shared CHannel) / physical downlink control channel (PDCCH, Physical Downlink Control CHannel) / enhanced physical downlink control channel (EPDCCH, Enhanced Physical Downlink Control CHannel), it can only be transmitted in subframe 0 (such as Figure 1 #0 in the subframe) or subframe 5 (such as Figure 1 #5); if DRS is transmitted alone, that is, DRS is not transmitted together with PDSCH / PDCCH / EPDCCH and other channels, the DRS signal can be sent on the first subframe in the DMTC window where LBT succeeds. When DRS is sent on a subframe, it occupies the first 12 symbols of the subframe, such as Figure 1 As shown, PSS and SSS occupy symbols 5 and 6, and CRS occupies symbols 0, 4, 7 and 11.

[0005] When applying new wireless (NR) technology to unlicensed spectrum, there can be a variety of network deployment methods, such as carrier aggregation (CA) deployment, dual connectivity (DC) deployment or standalone (SA) deployment. Since the LTE-LAA system only supports CA deployment, the DRS transmission method on the existing LAA-LTE system cannot meet the requirements when it is applied to the above-mentioned NR system-based deployment method. Summary of the invention

[0006] In order to solve the above technical problems, the embodiments of the present application provide a signal transmission method and device, and a computer storage medium.

[0007] The signal transmission method provided in the embodiment of the present application includes:

[0008] The terminal device determines a synchronization signal transmission mode on the first carrier, where the synchronization signal transmission mode is the first transmission mode or the second transmission mode;

[0009] The terminal device receives information on the first carrier according to the synchronization signal transmission method.

[0010] In one implementation, the terminal device determines the synchronization signal transmission mode on the first carrier, including:

[0011] The terminal device receives first indication information sent by a network device on a second carrier, where the first indication information is used to determine that a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode;

[0012] The terminal device determines the synchronization signal transmission mode on the first carrier according to the first indication information.

[0013] In one implementation, the terminal device determines the synchronization signal transmission mode on the first carrier, further comprising:

[0014] If the terminal device does not receive the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0015] In one implementation, the terminal device determines the synchronization signal transmission mode on the first carrier, further comprising:

[0016] When the terminal device accesses the network through the first carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0017] In one implementation, when the synchronization signal transmission mode is the first transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including:

[0018] The terminal device receives a first synchronization signal block (SSB, SynchronizationSignal Block) on the first carrier, and the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first physical broadcast channel (PBCH, Physical Broadcast CHannel).

[0019] In one embodiment, the first PBCH includes Master Information Block (MIB) information used for initial access of a terminal device.

[0020] In one implementation, when the synchronization signal transmission mode is the second transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including:

[0021] The terminal device receives a second SSB on the first carrier, and the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0022] In one embodiment, at least one of the information transmitted by the second PBCH and the information transmitted by the first PBCH is different.

[0023] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0024] In one implementation, when the synchronization signal transmission mode is the second transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including:

[0025] The terminal device receives a synchronization signal (Synchronization Signal, SS) on the first carrier, and the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0026] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0027] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0028] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0029] In one implementation, when the communication network where the terminal device is located is a CA network, the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0030] When the communication network where the device is located is not a CA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0031] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0032] In one implementation, the frequency domain resources on the first carrier are unlicensed frequency domain resources, and the frequency domain resources on the second carrier are licensed frequency domain resources.

[0033] The signal transmission method provided in the embodiment of the present application includes:

[0034] The network device determines a synchronization signal transmission mode on the first carrier, where the synchronization signal transmission mode is the first transmission mode or the second transmission mode;

[0035] The network device sends information to the terminal device on the first carrier according to the synchronization signal transmission method.

[0036] In one embodiment, the method further comprises:

[0037] The network device sends first indication information to the terminal device on a second carrier, where the first indication information is used to determine whether a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode.

[0038] In one implementation, when the synchronization signal transmission mode is the first transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including:

[0039] The network device sends a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0040] In one implementation, when the synchronization signal transmission mode is the second transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including:

[0041] The network device sends a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0042] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0043] In one implementation, when the synchronization signal transmission mode is the second transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including:

[0044] The network device sends an SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0045] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0046] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0047] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0048] In one implementation, the network device determines the synchronization signal transmission mode on the first carrier, including:

[0049] When the communication network where the network device is located is a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0050] When the communication network where the network device is located is not a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0051] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0052] In one implementation, the frequency domain resources on the first carrier are unlicensed frequency domain resources, and the frequency domain resources on the second carrier are licensed frequency domain resources.

[0053] The signal transmission device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0054] a determining unit, configured to determine a synchronization signal transmission mode on a first carrier, wherein the synchronization signal transmission mode is a first transmission mode or a second transmission mode;

[0055] The first receiving unit is configured to receive information on the first carrier according to the synchronization signal transmission mode.

[0056] In one embodiment, the device further comprises:

[0057] A second receiving unit, configured to receive first indication information sent by a network device on a second carrier, wherein the first indication information is used to determine that a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode;

[0058] The determining unit is used to determine the synchronization signal transmission mode on the first carrier according to the first indication information.

[0059] In one implementation, when the second receiving unit does not receive the first indication information sent by the network device on the second carrier, the determining unit is configured to determine that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0060] In one implementation, when the synchronization signal transmission mode is the first transmission mode,

[0061] The first receiving unit is used to receive a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0062] In one implementation manner, when the synchronization signal transmission mode is the second transmission mode, correspondingly,

[0063] The first receiving unit is used to receive a second SSB on the first carrier, where the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0064] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0065] In one implementation, when the synchronization signal transmission mode is the second transmission mode,

[0066] The first receiving unit is used to receive the SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0067] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0068] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0069] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0070] In one implementation, when the communication network in which the terminal device is located is a carrier aggregation (CA) network, the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0071] When the communication network where the terminal device is located is not a CA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0072] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0073] In one implementation, the frequency domain resources on the first carrier are unlicensed frequency domain resources, and the frequency domain resources on the second carrier are licensed frequency domain resources.

[0074] The signal transmission device provided in the embodiment of the present application is applied to a network device, and the device includes:

[0075] a determining unit, configured to determine a synchronization signal transmission mode on a first carrier, wherein the synchronization signal transmission mode is a first transmission mode or a second transmission mode;

[0076] The first sending unit is used to send information to the terminal device on the first carrier according to the synchronization signal transmission method.

[0077] In one embodiment, the device further comprises:

[0078] The second sending unit is used to send first indication information to the terminal device on the second carrier, and the first indication information is used to determine that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode.

[0079] In one implementation, when the synchronization signal transmission mode is the first transmission mode,

[0080] The first sending unit is used to send a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0081] In one implementation, when the synchronization signal transmission mode is the second transmission mode,

[0082] The first sending unit is used to send a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0083] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0084] In one implementation, when the synchronization signal transmission mode is the second transmission mode,

[0085] The first sending unit is used to send the SS on the first carrier, and the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0086] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0087] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0088] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0089] In one implementation, when the communication network in which the network device is located is a CA network, the determining unit determines that the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0090] When the communication network where the network device is located is not a CA network, the determining unit determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0091] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0092] In one implementation, the frequency domain resources on the first carrier are unlicensed frequency domain resources, and the frequency domain resources on the second carrier are licensed frequency domain resources.

[0093] The computer storage medium provided in the embodiment of the present application stores computer executable instructions thereon, and the computer executable instructions, when executed by a processor, implement the above-mentioned signal transmission method.

[0094] In the technical solution of the embodiment of the present application, for the carrier on the unlicensed spectrum of the CA network, since the network device does not need to send the PBCH for initial access to the terminal device, in this case the network device can modify the content sent in the PBCH to assist the terminal device in data transmission; or the network device can use the frequency domain resources used to send the PBCH for transmitting data channels or control channels to improve resource utilization. In addition, the network device can send indication information to the terminal device through the carrier on the licensed spectrum, so that the terminal device served by the carrier on the unlicensed spectrum can correctly receive the synchronization signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0096] Figure 1 Schematic diagram of the time domain structure for sending DRS within the DMTC window;

[0097] Figure 2 This is a schematic diagram of the time and frequency resources of SSB;

[0098] Figure 3 The signal transmission method of the present invention is shown in FIG. Figure 1 ;

[0099] Figure 4 The signal transmission method of the present invention is shown in FIG. Figure 2 ;

[0100] Figure 5 The structure of the signal transmission device of the embodiment of the present application is shown in FIG. Figure 1 ;

[0101] Figure 6 The structure of the signal transmission device of the embodiment of the present application is shown in FIG. Figure 2 ;as well as

[0102] Figure 7 A schematic diagram of the structural composition of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0103] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies involved in the embodiments of the present application are described below.

[0104] 1) Unlicensed spectrum

[0105] Unlicensed spectrum is a spectrum that can be used for radio equipment communication divided by countries and regions. This spectrum is generally considered to be a shared spectrum, that is, as long as the communication equipment in different communication systems meets the regulatory requirements set by the country or region on the spectrum, they can use the spectrum without applying for exclusive spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist in a friendly manner on the spectrum, some countries or regions have stipulated regulatory requirements that must be met when using unlicensed spectrum. For example, in Europe, communication equipment follows the LBT principle, that is, before the communication equipment sends a signal on the channel of the unlicensed spectrum, it needs to first perform channel sensing. Only when the channel sensing result is that the channel is idle, the communication equipment can send a signal; if the channel sensing result of the communication equipment on the channel of the unlicensed spectrum is that the channel is busy, the communication equipment cannot send a signal. And in order to ensure fairness, in one transmission, the duration of the communication equipment using the channel of the unlicensed spectrum for signal transmission cannot exceed the maximum channel occupancy time (MCOT, Maximum Channel Occupation Time). For another example, in order to avoid sub-band interference to signals transmitted on unlicensed spectrum channels, and to improve the detection accuracy of communication equipment when detecting channels on unlicensed spectrum, signals transmitted on unlicensed spectrum channels need to occupy at least a certain proportion of the channel bandwidth, for example, 80% of the channel bandwidth is occupied by signals in the 5GHz band, and 70% of the channel bandwidth is occupied by signals in the 60GHz band. For another example, in order to avoid excessive power of signals transmitted on unlicensed spectrum channels, which may affect the transmission of other important signals on the channel, such as radar signals, the regulations stipulate the maximum power spectral density when communication equipment uses unlicensed spectrum channels for signal transmission.

[0106] 2) Network architecture

[0107] The embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS) system, Universal Mobile Telecommunication System (UMTS), LTE system and LTE system evolution system, such as advanced long term evolution (LTE-A) system, NR system and NR system evolution system, such as NR (NR-U, NR-based access to Unlicensed spectrum) system on unlicensed spectrum, or next generation communication system, etc.

[0108] The embodiments of the present application can also be applied to device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and vehicle-to-vehicle (V2V) communication.

[0109] The communication system in the embodiment of the present application can be applied to the licensed spectrum, wherein the licensed spectrum is a spectrum dedicated to the network device. The communication system in the embodiment of the present application can also be applied to the unlicensed spectrum, wherein the unlicensed spectrum is a spectrum shared by at least two communication devices, such as a spectrum of 2.4 GHz, 5 GHz, 37 GHz or 60 GHz.

[0110] The communication system in the embodiment of the present application can be applied to CA network deployment scenarios, DC network deployment scenarios, and SA network deployment scenarios.

[0111] When the communication system in the embodiment of the present application is applied to the unlicensed spectrum and the network deployment scenario is CA, the CA network deployment scenario can be that the main carrier is on the licensed spectrum, the auxiliary carrier is on the unlicensed spectrum, and the main carrier and the auxiliary carrier are connected through an ideal backhaul.

[0112] When the communication system in the embodiment of the present application is applied to the unlicensed spectrum and the networking scenario is DC, the DC networking scenario can be that the main carrier is on the licensed spectrum, the auxiliary carrier is on the unlicensed spectrum, and the main carrier and the auxiliary carrier are connected through a non-ideal backhaul, wherein the system on the main carrier may belong to a different system from the system on the auxiliary carrier, for example, the system on the main carrier is an LTE system, and the system on the auxiliary carrier is an NR system, or the system on the main carrier may belong to the same system as the system on the auxiliary carrier, for example, the systems on the main carrier and the auxiliary carrier are both LTE systems or both are NR systems.

[0113] When the communication system in the embodiment of the present application is applied to the unlicensed spectrum and the network deployment scenario is SA, the terminal device can access the network through the system on the unlicensed spectrum.

[0114] The embodiments of the present application describe various embodiments in combination with network devices and terminal devices, wherein:

[0115] The terminal device may also be referred to as a user equipment (UE, User Equipment), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device may be a station (ST, STAION) in a wireless local area network (WLAN, Wireless Local Area Networks), a cellular phone, a cordless phone, a session initiation protocol (SIP, Session Initiation Protocol) phone, a wireless local loop (WLL, Wireless Local Loop) station, a personal digital assistant (PDA, Personal Digital Assistant) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in a fifth-generation communication (5G, fifth-generation) network or a terminal device in a future-evolved public land mobile network (PLMN, Public Land Mobile Network) network, etc. In an embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. They are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, such as glasses, gloves, watches, clothing and shoes.

[0116] The network device can be a device used to communicate with a mobile device. The network device can be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NB, NodeB) in WCDMA, an evolved base station (eNB or eNodeB, EvolutionalNode B) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device in a NR network, or a network device in a future evolved PLMN network, etc.

[0117] In an embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0118] In the embodiment of the present application, multiple cells can work at the same frequency on a carrier in an LTE system or NR system at the same time. In some special scenarios, the above-mentioned carrier and the cell can be considered to be equivalent. For example, in a CA scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identifier (Cell ID, Cell Identify) of the secondary cell working on the secondary carrier are carried at the same time. In this case, the concept of carrier and cell can be considered to be equivalent, for example, UE accessing a carrier is equivalent to accessing a cell.

[0119] The embodiments of the present application can be applied to uplink or downlink physical channels or reference signals. For example, the physical channels may include a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical HARQ indicator channel (PHICH), a physical broadcast channel (PBCH), a physical multicast channel (PMCH), a physical random access channel (PRACH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), etc., and the reference signal may include a demodulation reference signal (DMRS), a sounding reference signal (SRS), a channel state information reference signal (CSI-RS), a phase tracking reference signal (PT-RS), etc.

[0120] When NR technology is applied to unlicensed spectrum, there are many ways to deploy the network, such as CA, DC or SA. Different deployment methods have different requirements for terminal devices to access cells on the unlicensed spectrum. The following analyzes these scenarios:

[0121] Scenario 1: CA mode, that is, the NR carrier on the licensed spectrum is the primary carrier, and the NR carrier on the unlicensed spectrum is the secondary carrier. The primary carrier and the secondary carrier are connected through an ideal backhaul, and the subcarrier spacing supported by the secondary carrier on the unlicensed spectrum is not greater than the predefined subcarrier spacing, for example, the subcarrier spacing supported by the secondary carrier on the unlicensed spectrum is not greater than 120kHz.

[0122] In this scenario, the network equipment sends synchronization signals, MIB, secondary information blocks (SIB) and other information on the main carrier (authorized spectrum). The terminal device can access the network by receiving the synchronization signals, MIB, SIB and other information sent on the main carrier, and then transmit data on the secondary carrier according to the configuration information on the main carrier. Correspondingly, on the secondary carrier, the network equipment needs to send reference signals such as PSS and SSS so that the terminal device can complete the RRM measurement on the secondary carrier, thereby completing the secondary cell management.

[0123] Scenario 2: CA mode, that is, the NR carrier on the licensed spectrum is the primary carrier, and the NR carrier on the unlicensed spectrum is the secondary carrier. The primary carrier and the secondary carrier are connected through an ideal backhaul, and the subcarrier spacing supported by the secondary carrier on the unlicensed spectrum is not less than the predefined subcarrier spacing, for example, the subcarrier spacing supported by the secondary carrier on the unlicensed spectrum is not less than 240kHz.

[0124] Scenario 3: Different system DC mode, that is, the LTE carrier on the licensed spectrum is the primary carrier, the NR carrier on the unlicensed spectrum is the secondary carrier, and the primary carrier and the secondary carrier are connected through a non-ideal backhaul.

[0125] Scenario 4: DC mode in the same system, that is, the NR carrier on the licensed spectrum is the primary carrier, and the NR carrier on the unlicensed spectrum is the secondary carrier. The primary carrier and the secondary carrier are connected through a non-ideal backhaul.

[0126] In scenarios 2, 3, and 4, the network equipment sends synchronization signals, MIB, SIB and other information on the main carrier, and the terminal equipment can access the network by receiving the synchronization signals, MIB, SIB and other information sent on the main carrier. However, the terminal equipment cannot correctly determine the subframe information on the auxiliary carrier based on the time synchronization information obtained from the main carrier (scenario 2 is because the subcarrier interval on the auxiliary carrier is too large and the corresponding symbol is too short; scenario 3 and scenario 4 are because the main carrier and the auxiliary carrier are not co-located). Therefore, synchronization signals and PBCH need to be sent on the unlicensed auxiliary carrier so that the terminal equipment can correctly obtain time synchronization on the auxiliary carrier.

[0127] Scenario 5: SA mode, that is, the NR carrier on the unlicensed spectrum is the primary carrier. In this scenario, the network equipment needs to send synchronization signals, MIB, SIB and other information on the primary carrier on the unlicensed spectrum, so that the terminal equipment can access the network by receiving the synchronization signals, MIB, SIB and other information sent on the primary carrier.

[0128] Therefore, in the above five scenarios, on the NR carrier in the unlicensed spectrum, except for scenario 1 which only needs to send the synchronization signal for RRM measurement, scenarios 2, 3, 4, and 5 all need to send the synchronization signal and PBCH. It should be understood that the synchronization signal includes PSS and SSS, and the synchronization signal and PBCH constitute SSB, such as Figure 2 shown.

[0129] The technical solution of the embodiment of the present application is intended to solve the problem of how to send a synchronization signal similar to DRS in the NR-U system so that the synchronization signal can meet the measurement / synchronization requirements of users served by the NR-U system. The technical solution of the embodiment of the present application is described below.

[0130] Figure 3The signal transmission method of the present invention is shown in FIG. Figure 1 In the embodiment of the present application, Figure 3 As shown, the signal transmission method comprises the following steps:

[0131] Step 301: The terminal device determines a synchronization signal transmission mode on a first carrier, where the synchronization signal transmission mode is a first transmission mode or a second transmission mode.

[0132] In an embodiment of the present application, the terminal device can determine the synchronization signal transmission method on the first carrier based on the following method.

[0133] Method 1: The terminal device receives first indication information sent by a network device on a second carrier, and the first indication information is used to determine that a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode; the terminal device determines the synchronization signal transmission mode on the first carrier according to the first indication information.

[0134] Here, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device. In other words, the first carrier is called a carrier on an unlicensed spectrum, and the second carrier is a carrier on an authorized spectrum. It should be understood that the first carrier includes at least one carrier on an unlicensed spectrum, and the second carrier includes at least one carrier on an authorized spectrum.

[0135] For example, the network device uses one bit on the second carrier to represent the first indication information. The bit is 1, indicating that the synchronization signal transmission mode is the first transmission mode, and the bit is 0, indicating that the synchronization signal transmission mode is the second transmission mode. Of course, the bit may also be 0, indicating that the synchronization signal transmission mode is the first transmission mode, and the bit is 1, indicating that the synchronization signal transmission mode is the second transmission mode.

[0136] Mode 2: If the terminal device does not receive the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode. If the terminal device receives the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the second transmission mode.

[0137] Here, the specific content of the first indication information may not be considered. As long as the terminal device receives the first indication information on the second carrier (or the parameters corresponding to the first indication information are configured), the synchronization signal transmission mode is considered to be the second transmission mode. If the terminal device does not receive the first indication information on the second carrier (or the parameters corresponding to the first indication information are not configured), the synchronization signal transmission mode is considered to be the first transmission mode.

[0138] Mode 3: In combination with the above-mentioned Mode 1 and Mode 2, if the terminal device does not receive the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode. If the terminal device receives the first indication information sent by the network device on the second carrier, the terminal device determines the synchronization signal transmission mode on the first carrier according to the first indication information, which may be the first transmission mode or the second transmission mode.

[0139] Mode 4: If the terminal device is not configured with a second carrier, or the terminal device accesses the network through the first carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0140] Step 302: The terminal device receives information on the first carrier according to the synchronization signal transmission method.

[0141] 1) The synchronization signal transmission mode is the first transmission mode

[0142] The terminal device receives a first synchronization signal block (SSB) on the first carrier, and the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0143] In one embodiment, the first PBCH includes MIB information for initial access of the terminal device.

[0144] In one embodiment, the first PBCH includes information to assist the terminal device in performing data transmission on the first carrier, such as information such as the transmission power of the synchronization signal.

[0145] 2) The synchronization signal transmission mode is the second transmission mode

[0146] 2.1) The first implementation of the second transmission mode:

[0147] The terminal device receives a second SSB on the first carrier, and the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0148] Here, at least one of the information transmitted by the second PBCH is different from the information transmitted by the first PBCH. For example, the second PBCH includes at least one of the following information: a cell identifier, an identifier of the beamforming used by the synchronization signal, a transmission power of the synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0149] In one embodiment, the transmission power of the synchronization signal may be used by the terminal device to measure the path loss of the downlink channel or the quality information of the downlink channel.

[0150] In one embodiment, resource allocation for grant free uplink transmission is a semi-statically configured time-frequency resource.

[0151] In one embodiment, the carrier sensing method used for grant free uplink transmission includes uplink channel access procedures in the LAA system, such as Type 1 or Type 2 channel access.

[0152] It should be understood that the second PBCH may include MIB information used for initial access of the terminal device, or may not include MIB information used for initial access of the terminal device, and this application does not limit this.

[0153] 2.2) The second implementation of the second transmission mode:

[0154] The terminal device receives the SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0155] Here, there is no need to send a PBCH (eg, a first PBCH or a second PBCH) on the first carrier, and the transmission resource corresponding to the PBCH (eg, Figure 2 The time-frequency resources occupied by the PBCH in the PBCH are used to transmit other information, such as a downlink data channel or a downlink control channel. Of course, a filling signal may also be transmitted, or no information may be sent.

[0156] In one embodiment, the network device may use the transmission resource corresponding to the PBCH on the first carrier in a predefined manner, or specified by a communication standard, or notified to the terminal device through signaling. If the transmission resource corresponding to the PBCH is used to transmit a downlink data channel or a downlink control channel, the terminal device receives information on the transmission resource corresponding to the PBCH; if the transmission resource corresponding to the PBCH is used to transmit a fill signal, or does not send any signal, the terminal device does not receive information on the transmission resource corresponding to the PBCH.

[0157] In the above scheme, in one embodiment, if the communication network where the network device is located is a CA network, the synchronization signal transmission mode on the first carrier is the second transmission mode; if the communication network where the network device is located is not a CA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0158] In one embodiment, the synchronization signal transmission methods in combination with the above five network deployment scenarios can be described as follows:

[0159] Scenario 1: If the communication network where the terminal device and the network device are located is a CA network, and the subcarrier spacing supported by the first carrier is less than or equal to the first bandwidth (such as 120kHz), then the synchronization signal transmission mode on the first carrier is the second transmission mode.

[0160] Scenario 2: If the communication network where the terminal device and the network device are located is a CA network, and the subcarrier spacing supported by the first carrier is greater than or equal to the second bandwidth (such as 240kHz), then the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0161] Scenario 3 and Scenario 4: If the communication network where the terminal device and the network device are located is a DC network (different-system DC mode or same-system DC mode), the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0162] Scenario 5: If the communication network in which the terminal device and the network device are located is an SA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0163] Figure 4 The signal transmission method of the present invention is shown in FIG. Figure 2 In the embodiment of the present application, Figure 4 As shown, the signal transmission method comprises the following steps:

[0164] Step 401: A network device determines a synchronization signal transmission mode on a first carrier, where the synchronization signal transmission mode is a first transmission mode or a second transmission mode.

[0165] In an embodiment of the present application, if the communication network where the network device is located is a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the second transmission mode; if the communication network where the network device is located is not a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0166] In one embodiment, the synchronization signal transmission mode determined by the network device in combination with the above five network deployment scenarios can be described as follows:

[0167] Scenario 1: If the communication network where the terminal device and the network device are located is a CA network, and the subcarrier spacing supported by the first carrier is less than or equal to the first bandwidth (such as 120kHz), then the synchronization signal transmission mode on the first carrier is determined to be the second transmission mode.

[0168] Scenario 2: If the communication network where the terminal device and the network device are located is a CA network, and the subcarrier spacing supported by the first carrier is greater than or equal to the second bandwidth (such as 240kHz), then the synchronization signal transmission mode on the first carrier is determined to be the first transmission mode.

[0169] Scenario 3 and Scenario 4: If the communication network where the terminal device and the network device are located is a DC network (different-system DC mode or same-system DC mode), then the synchronization signal transmission mode on the first carrier is determined to be the first transmission mode.

[0170] Scenario 5: If the communication network where the terminal device and the network device are located is an SA network, it is determined that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0171] In an embodiment of the present application, in order to let the terminal device know the synchronization signal transmission mode on the first carrier, the network device may send first indication information to the terminal device on the second carrier, and the first indication information is used to determine whether the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode.

[0172] Here, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device. In other words, the first carrier is called a carrier on an unlicensed spectrum, and the second carrier is a carrier on a licensed spectrum.

[0173] For example, the network device uses one bit on the second carrier to represent the first indication information. The bit is 1, indicating that the synchronization signal transmission mode is the first transmission mode, and the bit is 0, indicating that the synchronization signal transmission mode is the second transmission mode. Of course, the bit may also be 0, indicating that the synchronization signal transmission mode is the first transmission mode, and the bit is 1, indicating that the synchronization signal transmission mode is the second transmission mode.

[0174] Of course, the network device may not send the first indication information to the terminal device, and let the terminal device know the synchronization signal transmission mode on the first carrier in an implicit way. For example: the network device does not send the first indication information, which means that the synchronization signal transmission mode is the first transmission mode; the network device sends the first indication information, which means that the synchronization signal transmission mode is the second transmission mode, or the network device sends the first indication information to let the terminal device determine whether the synchronization signal transmission mode is the first transmission mode or the second transmission mode according to the first indication information.

[0175] Step 402: The network device sends information to the terminal device on the first carrier according to the synchronization signal transmission method.

[0176] 1) The synchronization signal transmission mode is the first transmission mode

[0177] The network device sends a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0178] In one embodiment, the first PBCH includes MIB information for initial access of the terminal device.

[0179] In one embodiment, the first PBCH includes information to assist the terminal device in performing data transmission on the first carrier, such as information such as the transmission power of the synchronization signal.

[0180] 2) The synchronization signal transmission mode is the second transmission mode

[0181] 2.1) The network device sends a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0182] Here, at least one of the information transmitted by the second PBCH is different from the information transmitted by the first PBCH. For example, the second PBCH includes at least one of the following information: a cell identifier, an identifier of the beamforming used by the synchronization signal, a transmission power of the synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0183] It should be understood that the second PBCH may include MIB information used for initial access of the terminal device, or may not include MIB information used for initial access of the terminal device, and this application does not limit this.

[0184] 2.2) The network device sends an SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0185] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier are used to transmit a downlink data channel or a downlink control channel; or, the transmission resources corresponding to the first PBCH or the second PBCH in the first carrier are used to transmit a filling signal; or, the transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0186] The technical solution of the embodiment of the present application is further described below with reference to specific examples.

[0187] Application Example 1

[0188] SSB is sent on all NR carriers on the unlicensed spectrum. In the above scenario 1, the information sent in the PBCH is not only useless for the data transmission of the terminal device, but also occupies the spectrum resources that could be used for data channel or control channel transmission. In this case, the content sent in the PBCH is modified, for example: some information that can assist the terminal device in data transmission in this scenario is sent in the PBCH to avoid wasting resources. Alternatively, a fill signal is sent on the channel resources occupied by the PBCH to avoid misunderstandings of the system by the terminal device that should not receive the PBCH information.

[0189] Among them, the information used by the auxiliary terminal device for data transmission can be at least one of the following: cell identification, beamforming identification used for synchronization signals, transmission power of synchronization signals, resource allocation for grant free uplink transmission, carrier sensing method used for grant free uplink transmission, or power threshold used by network equipment for carrier sensing.

[0190] It should be understood that since the content of the PBCH sent in different scenarios is different, for example, PBCH1 (also known as the second PBCH) is sent in scenario 1, and PBCH2 (also known as the first PBCH) is sent in scenarios 2, 3, 4, and 5. For the terminal device, it is necessary to clarify whether the currently received PBCH is parsed according to PBCH1 or PBCH2 in order to correctly receive the PBCH. Since PBCH1 only occurs in scenario 1, and the terminal device in scenario 1 accesses the network through the main carrier on the authorized spectrum, signaling (also known as the first indication information) can be sent to the terminal device through the main carrier on the authorized spectrum to inform the terminal device whether the auxiliary carrier on the unlicensed spectrum sends PBCH1 or PBCH2. From the perspective of the terminal device, the terminal device can default to PBCH2 sent by the network device on the auxiliary carrier on the unlicensed spectrum; only when the terminal device receives the signaling on the authorized spectrum to confirm that the auxiliary carrier is PBCH1, it will receive it as PBCH1.

[0191] In one embodiment, the network device sends a 1-bit bitmap signaling to the terminal device through the main carrier on the authorized spectrum, and informs the terminal device through the bitmap signaling whether the auxiliary carrier on the unlicensed spectrum sends PBCH1 or PBCH2. In one embodiment, if the auxiliary carrier on the unlicensed spectrum sends PBCH1, the network device configures the terminal device with the auxiliary carrier PBCH1 related parameters on the unlicensed spectrum through the main carrier on the authorized spectrum, and if the auxiliary carrier on the unlicensed spectrum sends PBCH2, the network device does not configure the terminal device with the PBCH1 related parameters.

[0192] Application Example 2

[0193] In the above scenarios 2, 3, 4, and 5, SSB is sent on the NR carrier on the unlicensed spectrum. In scenario 1, only SS is sent on the NR carrier on the unlicensed spectrum, and PBCH is not sent. In scenario 1, since no PBCH-related information is sent, in order to avoid wasting resources, the spectrum resources used for PBCH transmission can be used for data channel or control channel transmission.

[0194] It should be understood that since the signals used for synchronization sent in different scenarios are different, for example, SS is sent in scenario 1, and SSB is sent in scenarios 2, 3, 4, and 5. For the terminal device, it is necessary to clarify whether the current network device sends SS or SSB, so as to complete the correct rate matching. Since SS only occurs in scenario 1, and the terminal device in scenario 1 accesses the network through the main carrier on the authorized spectrum, signaling (that is, the first indication information) can be sent to the terminal device through the main carrier on the authorized spectrum to inform the terminal device whether the auxiliary carrier on the unlicensed spectrum sends SS or SSB. From the perspective of the terminal device, the terminal device can default to the network device sending SSB on the auxiliary carrier on the unlicensed spectrum; only when the terminal device is in the CA scenario and receives signaling on the authorized spectrum to confirm that SS is sent on the auxiliary carrier, will it only receive SS.

[0195] In one embodiment, the network device sends a 1-bit bitmap signaling to the terminal device through the main carrier on the authorized spectrum, and informs the terminal device through the bitmap signaling whether the auxiliary carrier on the unlicensed spectrum sends SS or SSB. In one embodiment, if the auxiliary carrier on the unlicensed spectrum sends SS, the network device configures the terminal device with parameters that the auxiliary carrier on the unlicensed spectrum only sends SS through the main carrier on the authorized spectrum. If the auxiliary carrier on the unlicensed spectrum sends SSB, the network device does not configure the parameter for the terminal device.

[0196] Figure 5 The structure of the signal transmission device of the embodiment of the present application is shown in FIG. Figure 1The signal transmission device of this embodiment is applied to a terminal device, and the device includes:

[0197] A determining unit 501 is configured to determine a synchronization signal transmission mode on a first carrier, where the synchronization signal transmission mode is a first transmission mode or a second transmission mode;

[0198] The first receiving unit 502 is configured to receive information on the first carrier according to the synchronization signal transmission method.

[0199] In one embodiment, the device further comprises:

[0200] A second receiving unit 503 is configured to receive first indication information sent by a network device on a second carrier, where the first indication information is used to determine whether a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode;

[0201] The determining unit 501 is configured to determine the synchronization signal transmission mode on the first carrier according to the first indication information.

[0202] In one implementation, when the second receiving unit 503 does not receive the first indication information sent by the network device on the second carrier, the determining unit 501 is configured to determine that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0203] In one implementation, the synchronization signal transmission mode is the first transmission mode, and accordingly,

[0204] The first receiving unit 502 is used to receive a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0205] In one implementation manner, the synchronization signal transmission mode is the second transmission mode, and accordingly,

[0206] The first receiving unit 502 is used to receive a second SSB on the first carrier, where the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0207] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0208] In one implementation manner, the synchronization signal transmission mode is the second transmission mode, and accordingly,

[0209] The first receiving unit 502 is configured to receive the SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

[0210] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0211] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0212] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0213] In one implementation, the communication network in which the network device is located is a carrier aggregation (CA) network, and the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0214] If the communication network where the network device is located is not a CA network, then the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0215] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0216] Those skilled in the art should understand that Figure 5 The functions implemented by each unit in the signal transmission device shown can be understood by referring to the relevant description of the aforementioned signal transmission method. Figure 5 The functions of each unit in the signal transmission device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0217] Figure 6 The structure of the signal transmission device of the embodiment of the present application is shown in FIG. Figure 2 The signal transmission device of this embodiment is applied to a network device, and the device includes:

[0218] A determining unit 601 is configured to determine a synchronization signal transmission mode on a first carrier, where the synchronization signal transmission mode is a first transmission mode or a second transmission mode;

[0219] The first sending unit 602 is used to send information to the terminal device on the first carrier according to the synchronization signal transmission method.

[0220] In one embodiment, the device further comprises:

[0221] The second sending unit 603 is used to send first indication information to the terminal device on the second carrier, where the first indication information is used to determine whether the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode.

[0222] In one implementation, the synchronization signal transmission mode is the first transmission mode, and accordingly,

[0223] The first sending unit 602 is used to send a first SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first PBCH.

[0224] In one implementation manner, the synchronization signal transmission mode is the second transmission mode, and accordingly,

[0225] The first sending unit 602 is used to send a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

[0226] In one embodiment, the second PBCH includes at least one of the following information: a cell identifier, an identifier of a beamforming used by a synchronization signal, a transmission power of a synchronization signal, resource allocation for unlicensed uplink transmission, a carrier sensing method used for unlicensed uplink transmission, and a power threshold used by a network device when performing carrier sensing.

[0227] In one implementation manner, the synchronization signal transmission mode is the second transmission mode, and accordingly,

[0228] The first sending unit 602 is configured to send an SS on the first carrier, where the SS includes a primary synchronization signal and a secondary synchronization signal.

[0229] In one embodiment, the transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or,

[0230] The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or,

[0231] The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

[0232] In one implementation, the communication network in which the network device is located is a CA network, and the determining unit determines that the synchronization signal transmission mode on the first carrier is the second transmission mode;

[0233] If the communication network where the network device is located is not a CA network, the determining unit determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

[0234] In one implementation, the frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

[0235] Those skilled in the art should understand that Figure 6 The functions implemented by each unit in the signal transmission device shown can be understood by referring to the relevant description of the aforementioned signal transmission method. Figure 6 The functions of each unit in the signal transmission device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0236] If the above-mentioned signal transmission device of the embodiment of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM, Read Only Memory), a disk or an optical disk. In this way, the embodiment of the present application is not limited to any specific combination of hardware and software.

[0237] Correspondingly, an embodiment of the present application further provides a computer storage medium, in which computer executable instructions are stored. When the computer executable instructions are executed by a processor, the above-mentioned signal transmission method of the embodiment of the present application is implemented.

[0238] Figure 7 Schematic diagram of the structure of a computer device according to an embodiment of the present application. The computer device may be a terminal device or a network device. Figure 7 As shown, the computer device 100 may include one or more (only one is shown in the figure) processors 1002 (the processor 1002 may include but is not limited to a processing device such as a microprocessor (MCU, Micro Controller Unit) or a field programmable gate array (FPGA, Field Programmable Gate Array)), a memory 1004 for storing data, and a transmission device 1006 for communication functions. It can be understood by those skilled in the art that Figure 7 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 7 More or fewer components as shown, or with Figure 7 Different configurations are shown.

[0239] The memory 1004 can be used to store software programs and modules of application software, such as program instructions / modules corresponding to the method in the embodiment of the present application. The processor 1002 executes various functional applications and data processing by running the software programs and modules stored in the memory 1004, that is, implementing the above method. The memory 1004 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 1004 may further include a memory remotely arranged relative to the processor 1002, and these remote memories may be connected to the computer device 100 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0240] The transmission device 1006 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer device 100. In one example, the transmission device 1006 includes a network adapter (NIC, Network Interface Controller), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 1006 can be a radio frequency (RF, Radio Frequency) module, which is used to communicate with the Internet wirelessly.

[0241] The technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0242] In the several embodiments provided in the present application, it should be understood that the disclosed methods and intelligent devices can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0243] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0244] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0245] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A signal transmission method, characterized in that: Applicable to a new wireless NR system supporting a carrier aggregation CA network deployment mode, a dual connection DC network deployment mode or an independent SA network deployment mode, the method comprising: The terminal device determines a synchronization signal transmission mode on a first carrier, including: If the terminal device receives first indication information sent by a network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode according to the first indication information, wherein the first indication information is used to indicate that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode; or, If the terminal device is not configured with the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode; The terminal device receives information on the first carrier according to the synchronization signal transmission mode; The first carrier is a carrier on an unlicensed spectrum.

2. The method according to claim 1, characterized in that: The terminal device determines the synchronization signal transmission mode on the first carrier, further comprising: When the terminal device does not receive the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

3. The method according to claim 1, characterized in that: When the synchronization signal transmission mode is the first transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including: The terminal device receives a first synchronization signal block SSB on the first carrier, and the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first physical broadcast channel PBCH.

4. The method according to any one of claims 1 to 3, characterized in that: When the synchronization signal transmission mode is the second transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including: The terminal device receives a second SSB on the first carrier, and the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

5. The method according to claim 4, characterized in that: The second PBCH includes at least one of the following information: cell identification, beamforming identification used by synchronization signals, transmission power of synchronization signals, resource allocation for unlicensed uplink transmission, carrier sensing method used for unlicensed uplink transmission, and power threshold used by network equipment for carrier sensing.

6. The method according to any one of claims 1 to 3, characterized in that: When the synchronization signal transmission mode is the second transmission mode, the terminal device receives information on the first carrier according to the synchronization signal transmission mode, including: The terminal device receives a synchronization signal SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

7. The method according to claim 6, characterized in that: The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or, The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or, The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

8. The method according to any one of claims 1 to 3, characterized in that: When the communication network where the terminal device is located is a CA network, the synchronization signal transmission mode on the first carrier is the second transmission mode; When the communication network where the terminal device is located is not a CA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

9. The method according to any one of claims 1 to 3, characterized in that: The frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

10. A signal transmission method, characterized in that: Applicable to a new wireless NR system supporting a carrier aggregation CA network deployment mode, a dual connection DC network deployment mode or an independent SA network deployment mode, the method comprising: The network device determines a synchronization signal transmission mode on the first carrier, where the synchronization signal transmission mode is the first transmission mode or the second transmission mode; The network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode; Wherein, if the terminal device receives the first indication information sent by the network device on the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode according to the first indication information, wherein the first indication information is used to indicate that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode; or, if the terminal device is not configured with the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode; The first carrier is a carrier on an unlicensed spectrum.

11. The method according to claim 10, characterized in that When the synchronization signal transmission mode is the first transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including: The network device sends a first synchronization signal block SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first physical broadcast channel PBCH.

12. The method according to claim 10, characterized in that When the synchronization signal transmission mode is the second transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including: The network device sends a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

13. The method according to claim 12, characterized in that The second PBCH includes at least one of the following information: cell identification, beamforming identification used by synchronization signals, transmission power of synchronization signals, resource allocation for unlicensed uplink transmission, carrier sensing method used for unlicensed uplink transmission, and power threshold used by network equipment for carrier sensing.

14. The method according to claim 10, characterized in that When the synchronization signal transmission mode is the second transmission mode, the network device sends information to the terminal device on the first carrier according to the synchronization signal transmission mode, including: The network device sends a synchronization signal SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

15. The method according to claim 14, characterized in that The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or, The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or, The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

16. The method according to any one of claims 10 to 15, characterized in that The network device determines a synchronization signal transmission mode on a first carrier, including: When the communication network where the network device is located is a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the second transmission mode; When the communication network where the network device is located is not a CA network, the network device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

17. The method according to any one of claims 10 to 15, characterized in that The frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

18. A signal transmission device, applied to a terminal device, characterized in that: Applicable to a new wireless NR system supporting a carrier aggregation CA network deployment mode, a dual connection DC network deployment mode or an independent SA network deployment mode, the device includes: A determination unit, configured to determine a synchronization signal transmission mode on a first carrier; A second receiving unit, configured to receive first indication information sent by a network device on a second carrier, wherein the first indication information is used to determine whether a synchronization signal transmission mode on the first carrier is a first transmission mode or a second transmission mode; The determining unit is further configured to determine that the synchronization signal transmission mode is the first transmission mode or the second transmission mode if the terminal device receives the first indication information sent by the network device on the second carrier; or, if the terminal device is not configured with the second carrier, determine that the synchronization signal transmission mode on the first carrier is the first transmission mode; A first receiving unit, configured to receive information on the first carrier according to the synchronization signal transmission mode; The first carrier is a carrier on an unlicensed spectrum.

19. The device according to claim 18, characterized in that When the second receiving unit does not receive the first indication information sent by the network device on the second carrier, the determining unit is used to determine that the synchronization signal transmission mode on the first carrier is the first transmission mode.

20. The device according to claim 18, characterized in that When the synchronization signal transmission mode is the first transmission mode, accordingly, The first receiving unit is used to receive a first synchronization signal block SSB on the first carrier, where the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first physical broadcast channel PBCH.

21. The device according to any one of claims 18 to 20, characterized in that When the synchronization signal transmission mode is the second transmission mode, accordingly, The first receiving unit is used to receive a second SSB on the first carrier, where the second SSB includes: a primary synchronization signal, a secondary synchronization signal and a second PBCH.

22. The device according to claim 21, characterized in that The second PBCH includes at least one of the following information: cell identification, beamforming identification used by synchronization signals, transmission power of synchronization signals, resource allocation for unlicensed uplink transmission, carrier sensing method used for unlicensed uplink transmission, and power threshold used by network equipment for carrier sensing.

23. The device according to any one of claims 18 to 20, characterized in that When the synchronization signal transmission mode is the second transmission mode, accordingly, The first receiving unit is used to receive a synchronization signal SS on the first carrier, where the SS includes a primary synchronization signal and a secondary synchronization signal.

24. The device according to claim 23, characterized in that The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or, The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or, The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

25. The device according to any one of claims 18 to 20, characterized in that When the communication network where the terminal device is located is a CA network, the synchronization signal transmission mode on the first carrier is the second transmission mode; When the communication network where the terminal device is located is not a CA network, the synchronization signal transmission mode on the first carrier is the first transmission mode.

26. The device according to any one of claims 18 to 20, characterized in that The frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

27. A signal transmission device, used in a network device, characterized in that: Applicable to a new wireless NR system supporting a carrier aggregation CA network deployment mode, a dual connection DC network deployment mode or an independent SA network deployment mode, the device includes: a determining unit, configured to determine a synchronization signal transmission mode on a first carrier, wherein the synchronization signal transmission mode is a first transmission mode or a second transmission mode; A first sending unit, configured to send information to a terminal device on the first carrier according to the synchronization signal transmission mode; A second sending unit, configured to send first indication information to the terminal device on a second carrier, wherein the first indication information is used to determine that a synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode; Wherein, if the terminal device receives the first indication information sent by the network device on the second carrier, the terminal device determines, according to the first indication information, that the synchronization signal transmission mode on the first carrier is the first transmission mode or the second transmission mode; or, if the terminal device is not configured with the second carrier, the terminal device determines that the synchronization signal transmission mode on the first carrier is the first transmission mode; The first carrier is a carrier on an unlicensed spectrum.

28. The device according to claim 27, characterized in that When the synchronization signal transmission mode is the first transmission mode, accordingly, The first sending unit is used to send a first synchronization signal block SSB on the first carrier, and the first SSB includes a primary synchronization signal, a secondary synchronization signal and a first physical broadcast channel PBCH.

29. The device according to claim 27, characterized in that When the synchronization signal transmission mode is the second transmission mode, accordingly, The first sending unit is used to send a second SSB on the first carrier, where the second SSB includes a primary synchronization signal, a secondary synchronization signal and a second PBCH.

30. The device according to claim 29, characterized in that The second PBCH includes at least one of the following information: cell identification, beamforming identification used by synchronization signals, transmission power of synchronization signals, resource allocation for unlicensed uplink transmission, carrier sensing method used for unlicensed uplink transmission, and power threshold used by network equipment for carrier sensing.

31. The device according to claim 27, characterized in that When the synchronization signal transmission mode is the second transmission mode, accordingly, The first sending unit is used to send a synchronization signal SS on the first carrier, where the SS includes: a primary synchronization signal and a secondary synchronization signal.

32. The device according to claim 31, characterized in that The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a downlink data channel or a downlink control channel; or, The transmission resource corresponding to the first PBCH or the second PBCH in the first carrier is used to transmit a filling signal; or, The transmission resources corresponding to the first PBCH or the second PBCH in the first carrier do not send information.

33. The device according to any one of claims 27 to 32, characterized in that When the communication network in which the network device is located is a CA network, the determining unit determines that the synchronization signal transmission mode on the first carrier is the second transmission mode; When the communication network where the network device is located is not a CA network, the determining unit determines that the synchronization signal transmission mode on the first carrier is the first transmission mode.

34. The device according to any one of claims 27 to 32, characterized in that The frequency domain resources on the first carrier are frequency domain resources shared by at least two communication devices including the network device, and the frequency domain resources on the second carrier are frequency domain resources dedicated to the network device.

35. A computer storage medium having computer executable instructions stored thereon, characterized in that: When the computer executable instructions are executed by a processor, the method steps of any one of claims 1 to 9 or the method steps of any one of claims 10 to 17 are implemented.

36. A terminal device, characterized in that: The terminal device includes one or more processors, a memory and a transmission device, and the one or more processors are used to execute the program stored in the memory to implement the method steps described in any one of claims 1 to 9.

37. A network device, characterized in that: The network device includes one or more processors, a memory, and a transmission device, and the one or more processors are used to execute the program stored in the memory to implement the method steps of any one of claims 10 to 17.

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