WO2020063482A1 - Method and device for transmitting random access signals - Google Patents

Abstract

Provided by the present application are a method and device for transmitting random access signals, which provide a configuration solution for the transmission of random access signals in the scenario of an unauthorized frequency spectrum. The method comprises: a terminal device receiving system information from a network device, the system information being used for indicating one or more from among transmission period, transmission format and system frame number of a random access signal; and the terminal device receiving first control information from the network device, the first control information being used for indicating a sub-frame number, timeslot number or initial orthogonal frequency division multiplexing (OFDM) symbol for transmitting the random access signal.

Description

Method and device for transmitting random access signals

This application claims the priority of a Chinese patent application filed on September 29, 2018 with the State Intellectual Property Office, application number 201811149786.8, and application name "Method and Device for Transmitting Random Access Signals", the entire contents of which are incorporated herein by reference In this application.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting a random access signal.

Background technique

In a wireless communication system, in order for a terminal device to access the network, it is necessary to first obtain downlink synchronization with the cell through a cell search process, and then establish a connection with the cell and obtain uplink synchronization through a random access procedure. The random access process first requires the terminal device to send random access signals at specific time-frequency resource locations, and these specific time-frequency resource locations are configured by the network device and indicated to the terminal device.

At present, in the discussion of new radio (NR), a physical random access channel (physical random access channel (PRACH)) configuration table under the authorized spectrum is defined, which includes the time-frequency resource location of the terminal device sending a random access signal. Configuration. Different from the licensed spectrum scenario, in the unlicensed spectrum scenario, the data transmission of network equipment or terminal equipment is based on the listen-before-talk (LBT) mechanism, that is, before sending data, the network equipment or terminal equipment must first Listening to the channel. Only when the channel is monitored successfully, will there be a chance to perform data downlink or uplink transmission. The LBT results are often uncertain. Therefore, the related configuration in the PRACH table in the licensed spectrum scenario cannot be directly applied in the unlicensed spectrum scenario. Therefore, for an unlicensed spectrum scenario in NR, a special configuration scheme needs to be designed.

Summary of the Invention

The present application provides a method and device for transmitting a random access signal, and provides a configuration scheme for transmission of a random access signal in an unlicensed spectrum scenario.

In a first aspect, the present application provides a method for transmitting a random access signal. The method includes: a terminal device receiving system information from a network device, where the system information is used to indicate a transmission period, a transmission format, and a system frame number of the random access signal. One or more of the following: the terminal device receives first control information from the network device, and the first control information is used to indicate a subframe number or a slot number or a starting orthogonal frequency division multiplexing OFDM symbol for transmitting the random access signal .

In the technical solution of the present application, the network device indicates one or more of a transmission cycle, a transmission format, or a system frame number of the random access signal to the terminal device through the system information. Further, according to the result of the channel monitoring, the network device indicates to the terminal device, through the first control information, a subframe number or a slot number or a start symbol for transmitting a random access signal. In this way, the subframe number, slot number, or start symbol that the network device indicates to the terminal device is configured based on the result of the channel monitoring, so it can be applied to random access in an unlicensed spectrum scenario.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device determines, according to the system information and the first control information, a first time unit for sending a random access signal in a first period, the first The period is any one of the transmission periods of the random access signal indicated by the system information. The first period includes at least two time units. The terminal device listens to the channel on at least two time units included in the first period. When the monitoring channel succeeds on the second time unit that is located before the first time unit in the period, the terminal device determines the second time unit as the time unit that sends the random access signal in the first period.

In this embodiment, after the terminal device determines the time unit for transmitting the random access signal in the first period according to the system information and the first control information, the terminal device adjusts the time unit for transmitting the random access signal according to the LBT result.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device determines, according to the system information and the first control information, a first time unit for sending a random access signal in a first period, the first The period is any one of the transmission periods of the random access signal indicated by the system information. The first period includes at least two time units. When the channel fails to be monitored on the first time unit within the first period, the terminal device will be located at A third time unit after the first time unit and adjacent to the first time unit is determined as a time unit for sending the random access signal in the first period.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives adjustment information from the network device, and the adjustment information is used to indicate a first time unit for transmitting a random access signal in a first period It is adjusted to a fourth time unit, and the fourth time unit is located in the first period.

Further, the method further includes: the terminal device determines the fourth time unit as a time unit for transmitting a random access signal in the first period according to the adjustment information.

In this embodiment, after the network device indicates the time unit for transmitting the random access signal in the first period through the system information and the first control information, the network device is instructed to adjust the time unit according to the LBT result.

With reference to the first aspect, in some implementations of the first aspect, the random access signal has multiple candidate transmission formats, and each candidate transmission format in the multiple candidate transmission formats is in a configuration table of the random access signal. The proportion is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.

With reference to the first aspect, in some implementations of the first aspect, the first control information is specifically used to indicate an index of one or more subframe numbers for transmitting a random access signal, and the index of the one or more subframe numbers is absolute An index of a subframe number or a relative subframe number; or, the first control information is specifically used to indicate an index of one or more timeslot numbers for transmitting a random access signal, and when the index of the one or more timeslot numbers is absolute An index of a slot number or a relative slot number; or, the first control information is specifically used to indicate an index of one or more OFDM symbols transmitting the random access signal, and the index of the one or more OFDM symbols is an absolute OFDM symbol Or relative OFDM symbol index.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: receiving channel occupation time COT information from the network device, where the COT information is used to indicate information about a transmission time period preempted by the network device, and the transmission The time period information includes a start time of the transmission time period and / or a duration of the transmission time period.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: when the first control information is used to indicate an index of a relative subframe number for transmitting a random access signal, the terminal device according to the COT information and The index of the relative subframe number determines the absolute subframe number of the random access signal transmission; or when the first control information is used to indicate the index of the relative slot number of the random access signal transmission, the terminal device according to the COT information and The index of the relative slot number determines the absolute slot number of the random access signal.

In the scenario of unlicensed spectrum, due to the influence of channel access uncertainty on unlicensed spectrum (that is, the randomness of LBT results), network devices cannot predict the specific subframe on which LBT will succeed. As a result, the blind configuration or semi-static configuration of the network device cannot actually send a random access signal at the absolute subframe or absolute time slot position. In this application, the relative subframe number or relative slot number configured by the network device is the relative time within the transmission time period successfully seized by the LBT. Therefore, the relative time is determined in the time domain that can be used to send a random access signal. Resource location, which can improve the transmission efficiency of random access signals.

With reference to the first aspect, in some implementations of the first aspect, the COT information includes one or more bits, and the terminal device receives the COT information from the network device, including: the terminal device receives demodulation of the physical broadcast channel PBCH from the network device The reference signal DMRS or the tracking reference signal TRS, the DMRS or TRS of the PBCH carries COT information; or the terminal device receives the second control information from the network device, and the second control information carries the COT information.

Specifically, when the number of bits of the COT information is small, the network device may be carried through the PBCH, DMRS, and TRS. When the number of bits of the COT information is large, the network device may carry the second control information.

Optionally, the second control information may be carried by a downlink control channel. Further optionally, the second control information may be public control information. The common control information refers to control information common to all terminal devices in a cell where the terminal device is located.

In a second aspect, the present application provides a method for transmitting a random access signal. The method includes: a network device sends system information to a terminal device, and the system information is used to indicate a transmission period, a transmission format, and a system frame number of the random access signal. The network device sends first control information to the terminal device, where the first control information is used to indicate a subframe number or a slot number or a start orthogonal frequency division multiplexing OFDM symbol for transmitting a random access signal.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends adjustment information to the terminal device, where the adjustment information is used to indicate a first time unit for transmitting a random access signal in a first period Adjusted to the fourth time unit. The first cycle is any one of the transmission cycles of the random access signal indicated by the system information. The first cycle includes at least two time units. The first time unit and the fourth time unit belong to the first cycle. .

With reference to the second aspect, in some implementations of the second aspect, the random access signal has multiple candidate transmission formats, and each candidate transmission format in the multiple candidate transmission formats is described in a configuration table of the random access signal. The proportion is determined according to the duration of sending a random access signal corresponding to each candidate transmission format.

With reference to the second aspect, in some implementations of the second aspect, the first control information is specifically used to indicate an index of one or more subframe numbers for transmitting a random access signal, and the index of the one or more subframe numbers is absolute An index of a subframe number or a relative subframe number; or, the first control information is specifically used to indicate an index of one or more timeslot numbers for transmitting a random access signal, and when the index of the one or more timeslot numbers is absolute An index of a slot number or a relative slot number; or, the first control information is specifically used to indicate an index of one or more OFDM symbols transmitting a random access signal, and the index of the one or more OFDM symbols is an absolute OFDM symbol or a relative The index of the OFDM symbol.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends the channel occupation time COT information to the terminal device, where the COT information is used to indicate the transmission time period information preempted by the network device, The information of the transmission time period includes a start time of the transmission time period and / or a duration of the transmission time period.

With reference to the second aspect, in some implementations of the second aspect, the COT information includes one or more bits, and the network device sends the COT information to the terminal device, including: the network device sends demodulation of the physical broadcast channel PBCH to the terminal device The reference signal DMRS or the tracking reference signal TRS, the DMRS or TRS of the PBCH carries COT information; or, the network device sends second control information to the terminal device, and the second control information carries the COT information.

In a third aspect, the present application provides a method for transmitting a random access signal. The method includes: a terminal device receiving system information from a network device, where the system information is used to indicate a relative subframe number or relative time when transmitting the random access signal. Slot number; the terminal device determines a time domain resource location for transmitting a random access signal according to the system information.

In a fourth aspect, the present application provides a method for transmitting a random access signal. The method includes: a terminal device receiving downlink control information from a network device, where the downlink control information is used to indicate a relative subframe number or Relative slot number; the terminal device determines a time domain resource location for transmitting a random access signal according to the downlink control information.

In the method of the third aspect or the fourth aspect, the network device indicates the relative subframe number or the relative slot number for transmitting the random access signal to the terminal device through the system information or downlink control information, which can improve the transmission of the random access signal. effectiveness.

In a fifth aspect, the present application provides a communication device having the functions of a terminal device in any possible implementation manner of the first aspect, the third aspect, or the fourth aspect. These functions can be implemented by hardware, or they can also be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to these functions.

According to a sixth aspect, the present application provides a communication device having the functions of a network device in any possible implementation manner of the second aspect, the third aspect, or the fourth aspect. These functions can be implemented by hardware, or they can also be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to these functions.

In a seventh aspect, the present application provides a terminal device including a transceiver, a processor, and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store the computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the method in the first aspect or any possible implementation manner of the first aspect.

In an eighth aspect, the present application provides a network device, including a transceiver, a processor, and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store the computer program, and the processor is used to call and run the computer program stored in the memory, so that the network device executes the method in the second aspect or any possible implementation manner of the second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are run on a computer, the computer is caused to execute the first aspect or any possible implementation of the first aspect. Way in the way.

In a tenth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are run on a computer, the computer is caused to execute the second aspect or any possible implementation manner of the second aspect. Method.

In an eleventh aspect, the present application provides a chip provided by the present application, including a processor. The processor is configured to read and execute a computer program stored in the memory to perform the foregoing first aspect or the method in any possible implementation manner of the first aspect. Optionally, the chip should include a memory, and the memory is connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and / or information that needs to be processed. The processor obtains the data and / or information from the communication interface, processes the data and / or information, and outputs the processing result through the communication interface. The communication interface may be an input-output interface.

In a twelfth aspect, the present application provides a chip including a processor. The processor is configured to read and execute the computer program stored in the memory to perform the method in the second aspect or any possible implementation manner of the second aspect. Optionally, the chip should include a memory, and the memory is connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and / or information that needs to be processed. The processor obtains the data and / or information from the communication interface, processes the data and / or information, and outputs the processing result through the communication interface. The communication interface may be an input-output interface.

Optionally, the foregoing memory and the memory may be physically independent units, or the memory may be integrated with the processor.

In a thirteenth aspect, the present application provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer causes the computer to execute the first aspect and any one of the possible implementation manners. Methods.

In a fourteenth aspect, the present application provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer causes the computer to execute the second aspect and any possible implementation manner of the second aspect. Method.

In the technical solution provided in this application, the network device indicates one or more of a transmission period, a transmission format, or a system frame number of the random access signal to the terminal device through the system information. Further, according to the result of the channel monitoring, the network device indicates to the terminal device, through the first control information, a subframe number or a slot number or a start symbol for transmitting a random access signal. In this way, the subframe number, slot number, or start symbol that the network device indicates to the terminal device is configured based on the result of channel monitoring, so that it can be applied to random access in an unlicensed spectrum scenario.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

FIG. 2 is a schematic flowchart of a method for transmitting a random access signal provided by the present application.

FIG. 3 is a schematic diagram of a device for transmitting a random access signal provided by the present application.

FIG. 4 is a schematic diagram of a device for transmitting a random access signal provided by the present application.

FIG. 5 is a schematic structural block diagram of a terminal device applicable to an embodiment of the present application.

FIG. 6 is a schematic structural block diagram of a network device applicable to an embodiment of the present application.

detailed description

The technical solutions in this application will be described below with reference to the drawings.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. As shown in FIG. 1, the wireless communication system 100 may include at least one network device 101, and the network device 101 performs wireless communication with one or more terminal devices (for example, the terminal device 102 and the terminal device 103 shown in FIG. 1).

The wireless communication system 100 involved in the present application includes, but is not limited to, a global mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division multiple access (wideband code). division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division Duplex (time division duplex (TDD)), universal mobile communication system (UMTS), worldwide interconnected microwave access (worldwide interoperability for microwave access, WiMAX) communication systems, next-generation mobile communication systems (e.g., 5G) Three major application scenarios, namely enhanced mobile bandwidth (eMBB), ultra-reliable low latency communication (URLLC) and enhanced mass machine type communication (eMTC) or future Emerging new Communication systems, etc.

The terminal devices involved in the embodiments of the present application may be user equipment (UE), terminals, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices , User terminal, terminal, wireless communication device, user agent, or user device. Terminal equipment can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital processing (PDA), and wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or public land mobile network (PLMN) in future evolution Terminal equipment, etc.

The network equipment involved in the embodiments of the present application may be a global system (GSM) system or a base station (BTS) in a code division multiple access (CDMA) system. It can be a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved nodeB, eNB, or eNodeB) in an LTE system, or cloud wireless A wireless controller in a cloud access network (CRAN) scenario. Alternatively, the network device may also be a relay station, an access point, a vehicle-mounted device, a wearable device, etc. of a future communication system (for example, 5G).

The technical solution provided in this application is applicable to random access of terminal equipment in an unlicensed spectrum scenario. The random access process requires a network device to configure a time domain resource location for a terminal device to transmit a random access signal. For example, a transmission cycle of a random access signal, a system frame number, a sub-frame number, or a slot number. This application provides several ways for a network device to indicate to a terminal device the location of a time domain resource for transmitting a random access signal, which are described below respectively.

Way A

The network device instructs the terminal device on the time domain resource location to send the random access signal through the system message and the downlink control information.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method 200 for transmitting a random access signal provided by the present application.

210. The network device sends system information to the terminal device. The terminal device receives system information from a network device.

The system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of the random access signal.

In the embodiment of the present application, the random access signal may also be called a RACH, a RACH signal, a preamble, or the like. The transmission timing of the random access signal may be called an access timing (RACH Occasion, RO) and the like. It should be understood that the network device may configure one or more ROs for the terminal device in a system frame, a subframe, or a RACH slot.

Here, the transmission cycle, transmission format, and system frame number have the same meanings as in the prior art. For example, the transmission period can be 10ms, 20ms, 40ms, 80ms, 160ms. Transmission formats can be divided into long-sequence transmission formats and short-sequence transmission formats. The transmission format of the long sequence may include transmission formats 0 to 3. The short sequence transmission format can include A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, C2. A system frame number (system frame number, SFN) refers to a system frame number used to transmit RACH among at least one system frame number included in a RACH transmission cycle, and is therefore also referred to as a RACH system frame number. Here, the system frame number is a relative frame number of at least one system frame included in a RACH transmission period.

Optionally, the system information herein may be remaining minimum system information (RMSI), which is also called system information block 1 (SIB1).

220. The network device sends the first control information to the terminal device, and the terminal device receives the first control information from the network device.

The first control information is used to indicate a subframe number or a slot number or a start orthogonal frequency division multiplexing OFDM symbol for transmitting a random access signal.

Here, the subframe number of the random access signal refers to the subframe number of the RACH transmission. In NR, one subframe is usually 1 ms.

The slot number of the random access signal is also called a RACH slot number. The random access timeslot number is the sequence number of the timeslots contained in a system frame. When the subcarrier interval is 15 kHz, one system frame contains 10 time slots. At this time, the random access slot number can be any one of 0,1,2, ..., 8,9. When the subcarrier interval is 30 kHz, a system frame contains 20 time slots. At this time, the random access slot number can be any one of 0,1,2, ..., 18,19. Similarly, when the subcarrier interval is 60 kHz, one system frame contains 40 time slots. At this time, the random access slot number can be any one of 0,1,2, ..., 38,39.

In NR, for frequency bands below 6GHz, the number of RACH time slots included in the granularity of 1ms duration is called the number of RACH slots. For frequency bands above 6GHz, the number of RACH time slots included in the granularity of 0.25ms duration is called the number of RACH slots. . Each RACH slot may include one or more RACH occasions (RACH occasions, RO).

The starting OFDM symbol of a random access signal is also called a RACH starting symbol. The RACH start symbol is one OFDM symbol among a plurality of OFDM symbols included in one RACH slot. For a normal RACH slot (equivalent to a slot containing 14 symbols), the value of the RACH start symbol can be any one of 0,1, ..., 12,13. For a mini-slot (for example, a slot containing 2, 4, or 7 symbols), taking a short slot containing 7 symbols as an example, the value of the RACH start symbol can be 0, 1, ..., 6 , Any one of 7.

Optionally, the first control information in the embodiment of the present application may be downlink control information (downlink control information).

In the technical solution of the present application, the network device indicates one or more of a transmission cycle, a transmission format, or a system frame number of the random access signal to the terminal device through the system information. Further, according to the result of the channel monitoring, the network device indicates to the terminal device, through the first control information, a subframe number or a slot number or a start symbol for transmitting a random access signal. In this way, the subframe number, slot number, or start symbol that the network device indicates to the terminal device is configured based on the result of the channel monitoring, so it can be applied to random access in an unlicensed spectrum scenario.

Further, since the subframe number or slot number or start symbol indicated by the network device to the terminal device is configured based on the result of channel monitoring, the result of channel access can be dynamically and adaptively tracked, thereby increasing the unlicensed spectrum The efficiency of random access in scenarios.

Optionally, the method 200 may further include steps 230 and 240.

230. The terminal device determines a time domain resource location for sending a random access signal according to the received system information and the first control information.

Specifically, the time domain resource location is also the RO described above.

240. The terminal device sends a random access signal to the network device at the determined time domain resource location.

In step 230, the terminal device determines a time domain resource location for sending the random access signal according to the system information and the first control information, including determining a system frame number, a subframe number, or a time slot number for sending the random access signal.

The following describes how the terminal device determines the system frame number of the random access signal.

It should be understood that the method of determining the system frame number for sending a random access signal is the same in different transmission periods. Therefore, the following uses any one transmission cycle as an example for description. For convenience of description, this arbitrary transmission cycle is hereinafter referred to as a first cycle.

Optionally, the first period includes one or more time units. The time unit may be a time unit such as a system frame, a subframe, a time slot, or an OFDM symbol, which is not limited herein.

First, according to the system information and the first control information, the terminal may determine that a time unit for sending a random access signal in a first period configured by the network device is a first time unit. The first time unit may be any one of one or more time units included in the first period.

As mentioned above, due to the uncertainty of LBT results in the unlicensed spectrum scenario, although the network device configures the time unit for transmitting random access signals in the first cycle as the first time unit, it cannot guarantee that Resources are seized in the first time unit, or in other words, there is no guarantee that LBT will succeed in the first time unit. Therefore, after determining the first time unit of the random access signal transmission in the first cycle, the terminal device may also adjust the time unit of the random access signal transmission in the first cycle by way 1 and / or mode 2 described below. .

It should be understood that the terminal device adopts the method 1 and / or the method 2, which means that the terminal device can adjust the time unit for transmitting the random access signal only by using the method 1 or adjust the time unit for transmitting the random access signal only by using the method 2. . Alternatively, the terminal device adjusts the time unit for transmitting the random access signal by combining the mode 1 and the mode 2.

Way 1

The terminal device adjusts a time unit for sending a random access signal in the first period according to a channel monitoring result.

In manner 1, the terminal device may first determine a time unit for sending a random access signal in a first cycle configured by the network device according to the system information and / or the first control information. Further, the terminal device monitors the channel on one or more time units included in the first period. If the terminal device successfully monitors the channel on another time unit (hereinafter referred to as the second time unit) located before the first time unit, the terminal device determines the second time unit as a time unit that sends a random access signal in the first period . In other words, the terminal device adjusts the first time unit for sending the random access signal in the first period to the second time unit.

In the first period, the terminal device will send a random access signal to the network device on the second time unit. The second time unit is also located in the first period, and the second time unit may be any time unit located before the first time unit in the first period.

For example, the terminal device determines, according to the system information and / or the first control information, that a time unit for sending a random access signal in a first period configured by the network device is a system frame x. The terminal device listens to the channel in a system frame in the first cycle. If the terminal device successfully monitors the channel on system frame y, and system frame y precedes system frame x in time, the terminal device will assume that the system frame that sends the random access signal in the first cycle is adjusted from system frame x to system frame y. The system frame x and the system frame y are both system frames located in the first period. Where y≥0 and y is an integer

For example, if the transmission period of the random access signal is 20 ms, a system frame is known to be 10 ms. Then, one transmission cycle includes two system frames, which are denoted as system frame 0 and system frame 1. Assume that in a certain period, the system frame number of the random access signal configured by the network device is 1, and the terminal device successfully monitors the channel on system frame 0, then the terminal device will assume the system that sends the random access signal in this period. The frame number is adjusted to system frame 0.

Optionally, if the terminal device fails to monitor the channel in the first time unit of the first cycle, the terminal device will assume that the time unit of sending the random access signal in the first cycle is adjusted to the third time unit. The third time unit is a time unit located after the first time unit and adjacent to the first time unit, and the third time unit is also located in the first period.

For example, the terminal device determines, according to the system information and / or the first control information, that a time unit for sending a random access signal in a first period configured by the network device is a system frame x. The terminal device listens to the channel on the system frame in the first cycle. If the terminal device fails to monitor the channel on the system frame x, the terminal device will assume that the system frame that sends the random access signal in the first cycle is automatically extended from the system frame x to the next system frame x + 1. The system frame x and the system frame x + 1 are both system frames located in the first period. Among them, x ≧ 0, and x is an integer.

For example, if the transmission period of the random access signal is 20 ms, and a system frame is known to be 10 ms, two transmission frames are included in one transmission period, which are denoted as system frame 0 and system frame 1, respectively. Assume that in a certain period, the system frame number of the random access signal configured by the network device is 0, and the terminal device fails to monitor the channel on system frame 0. The frame number is automatically adjusted to system frame 1.

Further, if the terminal device fails to listen to the channel on the system frame x + 1, the terminal device will assume that the system frame x + 1 that sends a random access signal in the first cycle is continued to be extended to the next system frame x + 2. And so on, until the monitoring channel is successful. At this time, the terminal device will assume that a system frame (for example, recorded as a system frame x + n) that successfully monitors the channel is determined as a system frame that sends a random access signal in the first period. The system frame x + n is located in the first period in time, and n is a positive integer.

It can be understood that if the terminal device fails to monitor the channel on all time units in the first cycle, it enters the next cycle. In the next cycle, the process by which the terminal device determines the time unit for sending a random access signal is the same as the above-mentioned first cycle, and is not repeated here.

In the above example, after the terminal device fails to monitor the channel on the first time unit, it automatically extends the time unit transmitting the random access signal to the next time unit. Optionally, as an implementation manner, after the terminal device fails to monitor the channel on the first time unit, the time unit for transmitting the random access signal is extended to any time unit after the first time unit without The extension is limited to the step size of 1, which is not limited in this application.

It can be understood that the above description uses the time unit as a system frame as an example. For the time unit as a subframe, a time slot, or an OFDM symbol, the time domain resource position of the random access mentioned above is dynamically adjusted according to the LBT result. The method is still feasible and applicable. For example, assuming that in a certain period, the subframe number for sending random access signals in a system frame configured by a network device is 0, and the terminal device fails to monitor the channel on subframe 0, the terminal device will assume that the The subframe number of the random access signal is automatically adjusted to subframe 1 or any other subframe that is predefined. Or, the number of the subframes in which a random access signal is sent in a system frame configured by the network device is 1, and the terminal device successfully monitors the channel in subframe 0, the terminal device will assume that the subframe in which the random access signal is sent in this period The number is automatically adjusted to subframe 0 or any other subframe that is predefined.

Way 2

The network device instructs the terminal device to adjust a time unit for sending a random access signal in the first period according to a channel monitoring result.

According to the foregoing, it is known that the network unit configures the time unit for sending the random access signal in the first period to the terminal device through the system information and / or the first control information as the first time unit. After that, the network device listens to the channel. If the network device successfully monitors the channel at other time units in the first cycle, the network device sends adjustment information to the terminal device, and the adjustment information is used to instruct the terminal device to adjust the first time unit that sends the random access signal in the first cycle. It is the fourth time unit, and the fourth time unit is located in time in the first period.

It should be noted that, the fourth time unit here is only numbered for distinguishing from the second time unit and the third time unit in the above manner 1. In fact, the fourth time unit refers to a time unit in which the network device successfully monitors the channel. Therefore, the fourth time unit may be any time unit other than the first time unit in the first period. For example, the fourth time unit may be located before the first time unit, or may be located after the first time unit, which is not limited in this application.

In mode 2, the adjustment information may be transmitted by the network device through system information, RRC signaling, DCI signaling, phase reference signals (TRS), and channel state information reference signals (CSI-RS). Any one or more of the demodulation reference signal or the common control information of the physical broadcast channel is indicated to the terminal device, which is not limited in this application. When the adjustment information is indicated to the terminal device by the DMRS of the TRS, CSI-RS, or PBCH, optionally, it is carried by the initialization value, cyclic shift value, or scrambling code of the TRS sequence, CSI-RS sequence, or DMCH sequence of PBCH The adjustment information.

It can be seen from the foregoing description that, in manner A, the network device instructs the terminal device on the time domain resource location for transmitting the random access signal by using the system information and / or the first downlink control information.

Way B

The network device indicates to the terminal device the location of the time domain resource that sends the random access signal in a semi-static manner through the system information.

In the semi-static mode, the time domain resource location for transmitting random access signals can be configured or indicated by the network device through system information. Before the network device performs the next configuration, the terminal device can periodically reuse the same time domain resource location.

Similarly, due to the uncertainty of the LBT results in the unlicensed spectrum scenario, after the terminal device determines the time unit for transmitting a random access signal in a transmission period according to the semi-static indication of the network device, it needs to correct the The time unit for transmitting the random access signal during the transmission period configured by the network device is adjusted. The process for the terminal device to adjust the time unit used to transmit the random access signal in a transmission cycle can refer to the adjustment of the first time unit described in Mode 1 and Mode 2 above. The process is exactly the same, and is not repeated here. .

Optionally, the system information described in Mode B may be RMSI. For example, the network device indicates the system frame number of the random access signal to the terminal device through the RMSI semi-statically. For the terminal equipment, the system frame number is determined semi-statically based on the RMSI first. Subsequently, the system frame number is adjusted according to the channel monitoring result. Finally, a random access signal is transmitted to the network device on the system frame number where the channel is successfully monitored.

Way C

The network device indicates the location of the time domain resource for transmitting the random access signal to the terminal device through the system information or the downlink control information.

Specifically, the network device indicates to the terminal device at least one of a relative subframe number or a relative slot number for transmitting the random access signal through the system information.

The relative sub-frame number refers to the sub-frame number indicated by the system information, which is the relative sub-frame number in the transmission time period preempted by the network device. Alternatively, the relative time slot number refers to a time slot number indicated by the system information, which is a relative time slot number in a transmission time period preempted by the network device.

In the foregoing, several manners in which the network device indicates to the terminal device the location of the time domain resource for transmitting the random access signal have been described.

Further, in the NR unlicensed spectrum scenario, the random access signal RACH may support multiple candidate transmission formats. These candidate transmission formats may include A1, B1, C0, A1 + B1, A2 + B2, A2, B2, C2, and so on. The definition of each transmission format is the same as the definition of these transmission formats supported by RACH in the licensed spectrum scenario.

Optionally, in an unlicensed spectrum scenario, in order to increase the transmission opportunity of RACH, in the configuration table of RACH, the proportion of different transmission formats in the configuration table may correspond to the duration of sending RACH corresponding to each transmission format. Related.

For example, a transmission format with a longer duration occupies a smaller proportion in the RACH configuration table, and a transmission format with a shorter duration occupies a larger proportion in the RACH configuration table. In other words, a transmission format with a longer duration occupies fewer lines in the RACH configuration table, and a transmission format with a shorter duration occupies more lines in the RACH configuration table.

Optionally, the relationship between the proportion and size of each transmission format in the RACH configuration table in the unlicensed spectrum scenario may be shown in the following formula (1).

A1 / B1 / C1≥A1 + B1≥A2 / B2 / C2≥A2 + B2 (1)

Among them, A1 / B1 / C1 represents A1 or B1 or C1. A2 / B2 / C2 means A2 or B2 or C2. That is, in the formula (1), the character "/" represents the meaning of "or".

In formula (1), the proportion of any one of the transmission formats A1, B1, or C1 in the RACH configuration table is greater than or equal to the transmission format A1 + B1. The proportion of the transmission format A1 + B1 in the RACH configuration table is greater than or equal to any one of the transmission formats A2, B2, or C2. The transmission format A2 + B2 occupies the smallest proportion in the RACH configuration table. For example, the proportion of any of the transmission formats A1, B1, or C1 in the RACH configuration table is 20%, the proportion of transmission format A1 + B1 in the RACH configuration table is 15%, and the transmission format A2 Either B2 or C2 occupies 8% of the RACH configuration table, and the transmission format A2 + B2 occupies 1% of the RACH configuration table.

It should be noted that the configuration table of RACH can be expressed as PRACH configuration index, and it is abbreviated as PRACH ConfigIndex. PRACH ConfigIndex is a value from 0 to m (for example, 0 to 255), where m is a positive integer greater than 0. Each value corresponds to a row in the PRACH ConfigIndex, and each row corresponds to a random access signal such as the transmission format of the random access signal, the system frame number, the transmission period, and the specific time slot position or subframe position of the random access signal in the system frame. Configuration parameters. In other words, the PRACH ConfigIndex defines a pattern of random access resources that appear periodically.

See Table 1. Table 1 is an example of a part of the RACH configuration table.

Table 1

Transmission format	OFDM symbol	T -SEQ (T S )	T - CP (T S )	T - GP (T S )	scenes to be used
A1	2	4096	288	0	small cell
A2	4	8192	576	0	normal cell
A3	6	12288	864	0	normal cell
B1	2	4096	216	72	small cell
B2	4	8192	360	216	normal cell
B3	6	12288	504	360	normal cell
B4	12	24576	936	792	normal cell
C0	1	2048	1240	1096	normal cell
C2	4	8192	2048	2916	normal cell

It should be understood that the random access signal is composed of a cyclic prefix (CP), a length of a preamble sequence, and a GP. Among them, GP is the difference between the preamble sequence and the PRACH slot length. In Table 2, the length of the CP is denoted as T_CP, the length of the leader sequence is denoted as T_SEQ, and the length of the GP is denoted as T_GP.

In Table 1, small cells generally refer to small base stations other than macro base stations, and may include micro base stations, nano base stations, pico cells, femtocells, and the like. Normal cell indicates a normal Acer station. Alternatively, a small cell may refer to a cell with a relatively small coverage radius. A normal cell may refer to a cell with a medium or normal coverage radius.

Of course, the ratio given in formula (1) is only an example, and the embodiment of the present application does not limit the ratio of each transmission format in the RACH configuration table.

According to the foregoing, it is known that in a license-free spectrum scenario, the time-frequency resource location of a network device configured to send a random access signal will be affected by the uncertainty of the LBT result. There is no guarantee that a part of the time-frequency resource location will always be transmitted. Therefore, in order to increase the random access opportunity of the terminal device and improve the efficiency of random access, in the above step 220, the content indicated by the first control information may specifically include the following possibilities.

Optionally, the first control information is used to indicate an index of one or more subframe numbers for transmitting a random access signal, and the index of the one or more subframe numbers is an index relative to the subframe number; or,

The first control information is used to indicate an index of one or more timeslot numbers for transmitting a random access signal, and the index of the one or more timeslot numbers is an index of a relative timeslot number; or,

The first control information is used to indicate a starting OFDM symbol for transmitting a random access signal.

The relative subframe number or the relative slot number or the relative OFDM symbol refers to the subframe number, the slot number, or the OFDM symbol indicated by the first control information, which is a relative subframe number in the transmission time period COT preempted by the network device Or relative slot number or relative OFDM symbol.

Specifically, if the network device seizes the transmission time period during the channel monitoring process, it may indicate the relative subframe number or the relative time slot number by sending the first control information to the terminal device.

It should be understood that in NR, one system frame includes 10 subframes, and each subframe is 1 ms. For example, if the transmission time period preempted by the network device is 2ms, the transmission time period may include two subframes. If the two subframes are numbered 0 and 1, respectively, the relative subframe number in the transmission time period may be Subframe number 0 and subframe number 1. That is to say, if the network device indicates the relative sub-frame 0 in the transmission time period to the terminal device, it indicates that the network device indicates a more definitive time domain position in the transmission time period. The first 1ms or the second 1ms in the transmission time period. As another example, if the transmission time period preempted by the network device is 2ms, and these 2ms can include 4 time slots, the relative time slot numbers in the transmission time period can be time slot number 0, time slot number 1, and time slot number. 2 and slot number 3. If the network device indicates the relative slot number 2 to the terminal device, the terminal device may determine the time domain position where the random access signal is transmitted as the third slot number of the 2ms.

It should be noted that the network device indicates the location of the time-frequency resource for transmitting the random access signal by using the relative subframe number or the relative slot number, which can increase the random access efficiency of the terminal device. The reason is that compared with the absolute sub-frame number or absolute slot number indicated by the network device, the network device cannot predict because it is affected by the uncertainty of channel access on the unlicensed spectrum, that is, the randomness of the LBT result. On which specific subframe will LBT succeed (that is, to obtain a channel access opportunity), resulting in blindly configured absolute subframes or absolute time slot positions of network devices that cannot actually send random access signals. The relative subframe number or relative slot number configured in this application is the relative time within the transmission time period successfully seized by the LBT. Therefore, it is possible to determine the location of the time domain resource for sending the random access signal, thereby improving the random access. Transmission efficiency of incoming signals.

As another implementation manner in the unlicensed spectrum scenario, the first control information may also be used to indicate an index of one or more subframe numbers for transmitting a random access signal, and the index of the one or more subframe numbers is an absolute subframe. The index of the number. Alternatively, the first control information may also be used to indicate an index of one or more timeslot numbers for transmitting a random access signal, and the index of the one or more timeslot numbers is an index of an absolute timeslot number. Alternatively, the first control information may also be used to indicate an index of one or more OFDM symbols for transmitting a random access signal, and the index of the one or more OFDM symbols is an index of absolute OFDM. Alternatively, the first control information may also be used to indicate an index of one or more system frame numbers for transmitting a random access signal.

When the network device indicates the relative subframe number or the relative slot number or the relative OFDM symbol to the terminal device, further, the network device further needs to send channel occupation time (COT) information to the terminal device.

The COT information is used to indicate information of a signal transmission time period preempted by the network device, and the information of the transmission time period includes a start time of the transmission time period and / or a duration of the transmission time period.

If the first control information indicates a relative subframe number, for example, a relative subframe number in a COT, the terminal device determines an absolute subframe number for transmitting a random access signal according to the received COT information and the relative subframe number. Alternatively, if the first control information indicates a relative slot number, for example, a relative slot number in the COT, the terminal device determines an absolute slot number for transmitting a random access signal according to the received COT information and the relative slot number. Or, if the first control information indicates a relative OFDM symbol, for example, a relative OFDM symbol in a COT, the terminal device determines an absolute OFDM symbol for transmitting a random access signal according to the received COT information and the relative OFDM symbol.

Optionally, the relative subframe number may be a relative subframe number in the COT, or the relative slot number is a relative slot number in the COT. It is understandable that the relative subframe number or the relative slot The number may also be a relative subframe number or a relative slot number in other predefined time periods, which is not limited herein.

Optionally, when the network device indicates the COT information to the terminal device, the terminal device may also implicitly determine a system frame number for transmitting a random access signal according to the COT information indicated by the network device. When the COT information is indicated to the terminal device through the first control information, it means that the determination of the system frame number for transmitting a random access signal is implicitly determined by the first control information, and therefore is dynamic.

In the embodiment of the present application, when the network device indicates the relative subframe number or the relative slot number to the terminal device through the first control information, according to a field in the first control information indicating a time domain resource location for transmitting a random access signal (hereinafter Recorded as an indication field) is always present, the network device may have the following two designs.

(1) The indication field in the first control information always exists.

That is to say, the network device specifically configures an indication field in the first control information. This indication field exists regardless of whether the network device preempts the COT or indicates to the terminal device a relative subframe number or a relative slot number. .

It can be understood that if the network device indicates a relative subframe number or a relative slot number or a relative OFDM symbol, the indication field carries one or several bits for indication. If the network device indicates an absolute subframe number or an absolute slot number or an absolute OFDM symbol, the indication field may be set to invalid.

(2) Whether the indication field is set in the first control information depends on whether the network device preempts the COT.

It is easy to understand that if the network device preempts the COT, the network device indicates the relative subframe number or relative slot number or relative OFDM symbol to the terminal device. At this time, the network device sets an indication field in the first control information. If the network device does not preempt the COT, or the network device indicates the absolute subframe number or the absolute slot number or the absolute OFDM symbol to the terminal device, the network device does not set the indication field in the first control information.

The embodiment of the present application does not limit which design of the above (1) and (2) is specifically adopted by the network device.

Specifically, the COT information includes one or several bits. Depending on the number of bits included in the COT information, the network device may choose to send COT information to the terminal device in different ways.

Optionally, as an implementation manner, if the number of bits of the COT information is relatively small, the network device may carry the COT information through some reference signals. For example, a network device sends a PBCH DMRS or TRS to a terminal device, and the sequence initialization value of the PBCH DMRS or TRS carries COT information. Equivalently, the sequence cyclic shift value of the PBCH DMRS or TRS carries COT information. Alternatively, the scrambling code sequence of the PBCH, DMRS or TRS carries COT information.

Taking the TRS carrying COT information as an example, a system frame can be divided into multiple segments according to the length of the supported COT, and the multiple segment information is carried through different TRS sequences. Assuming the length of the COT is 2ms, the 10ms contained in a system frame can be divided into 5 interval segments, respectively segment 1 (interval segment 1, the same below): 0 to 1 ms, segment 2: 2 to 3 ms, segment 3: 4 ～ 5ms, segment 4: 6-7ms, segment 5: 8-9ms. The COT preempted during the LBT success can be any one of the five intervals.

It should be understood that segment 1 corresponds to a 2 ms interval corresponding to 0 ms-1 ms of the system frame, segment 2 corresponds to a 2 ms interval corresponding to 2 ms to 3 ms of the system frame, and segment 3 corresponds to 2 ms corresponding to 4 ms to 5 ms of the system frame. Interval segment. The rest can be deduced by analogy. Based on different segment information, initialization values or cyclic shift values of different TRS sequences can be obtained, thereby generating different TRS sequences.

See Table 2. Table 2 is an example of the relative subframe or slot number of the random access signal within the COT configured by the RMSI.

Table 2

In the above table, the subframe numbers 0 ', 1', and 2 'indicate the relative subframe numbers of the random access signal in the COT after the LBT succeeds. Take the COT length as 3ms as an example, where 0 'indicates the first subframe of the random access signal in the COT after the successful LBT, and 1' indicates the second subframe of the random access signal in the COT after the successful LBT. , 2 'represents the third subframe of the random access signal in the COT after the successful LBT. nSFN represents the absolute system frame number of the random access signal transmission, x is the transmission period of the random access signal / 10, and y is the relative system frame number of the random access signal in one transmission period. It should be understood that the above table is only an exemplary configuration, and the configuration of the actual random access signal may be other configurations different from the above table, which is not specifically limited here.

Furthermore, in order to increase the chance of the terminal device sending RACH, the network device should ensure that each row in the RACH configuration table meets the chance of at least M RACH transmissions.

Reflected in Table 2, that is, the product in the last two columns in Table 2 (that is, the number of time slots of PRACH in one subframe and the number of ROs in one time slot) should be greater than or equal to M. For example, the product of the last two columns of each row in Table 2 is greater than or equal to 12, that is, the corresponding configuration of each row can guarantee at least 12 opportunities for RACH transmission.

Optionally, the value of M may be predefined, may be configured by a network device, or may be determined implicitly. For example, the network device will be implicitly associated with different M values according to the LBT type, which is not limited in this application.

Optionally, M = 2, 4, 8, 12, or 24.

Optionally, as an implementation manner, if the number of bits of the COT information is relatively large, the network device sends the second control information to the terminal device, and the second control information carries the COT information.

The second control information may be public control information. Here, the meaning of the common control information is control information common to all terminal devices in the cell. It should be understood that the second control information may also be control information of a terminal device group. Here, the control information of the terminal device group refers to control information common to a group of terminal devices. Optionally, the second control information is carried by a downlink control channel.

The method 200 for transmitting a random access signal and various possible implementations thereof provided in the present application have been described in detail with reference to FIG. 1 and FIG. 2. The apparatus, terminal equipment, and network equipment for transmitting random access signals provided in this application are described below.

Referring to FIG. 3, FIG. 3 is a schematic diagram of an apparatus 500 for transmitting a random access signal provided by the present application. As shown in FIG. 3, the apparatus 500 includes a communication unit 510.

The communication unit 510 is configured to receive system information from a network device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of a random access signal;

The communication unit 510 is further configured to receive first control information from the network device, where the first control information is used to indicate a subframe number or a slot number or a start orthogonal frequency division multiplexing OFDM symbol for transmitting a random access signal.

Optionally, the communication unit 510 may include a receiving unit and a transmitting unit, and has a function of receiving and transmitting at the same time.

Optionally, the device 500 and the terminal device in the method embodiment completely correspond, and the corresponding units of the device 500 are configured to perform the corresponding steps performed by the terminal device in the above method 200 and its various embodiments. For example, the communication unit 510 in the apparatus 500 performs the steps of receiving and / or transmitting in the method embodiment, for example, the step 210 of receiving the system information from the network device in FIG. 2 or the step of receiving the first control information from the network device 220. Alternatively, a step of receiving second control information or COT information from a network device, or the like is performed.

Optionally, the apparatus 500 may also be a chip or an integrated circuit installed in a terminal device.

Optionally, when the apparatus 500 is a terminal device, the communication unit 510 may be a transceiver. The transceiver may include a transmitter and a receiver, which collectively implement the receiving and transmitting functions. Alternatively, when the device 500 is a chip or an integrated circuit installed in a terminal device, the communication unit 510 may also be an input / output interface.

Further, the apparatus 500 further includes a processing unit 520. The processing unit 520 is configured to execute steps in the device 500 that are performed by the device 500 except for receiving and sending. The processing unit 520 may be a processor.

For example, the processing unit 510 is configured to perform step 220. That is, according to the system information and the first control information received by the communication unit 510, a time-frequency resource location for transmitting a random access signal is determined.

Optionally, the processing unit 520 is configured to determine a first time unit for sending a random access signal in a first period according to the system information and the first control information, and the first period is a transmission period of the random access signal indicated by the system information. Any one of the first cycle includes at least two time units; the communication unit 510 is further configured to monitor the channel on at least two time units included in the first cycle; the processing unit 520 is further configured to determine that the communication unit 510 is at the first time When the monitoring channel succeeds on the second time unit before the unit, the second time unit is determined as a time unit for sending a random access signal in the first period.

Optionally, the processing unit 520 is configured to determine a first time unit for sending a random access signal in a first period according to the system information and the first control information, and the first period is a transmission period of the random access signal indicated by the system information. Any one of the first cycle includes at least two time units; the communication unit 510 is further configured to monitor the channel on at least two time units included in the first cycle; the processing unit 520 is further configured to determine that the communication unit 510 is at the first time When the monitoring channel on the unit fails, a third time unit located after the first time unit and adjacent to the first time unit is determined as a time unit that sends a random access signal in the first period.

Optionally, the communication unit 510 is further configured to receive adjustment information from a network device. For the description of the adjustment information, refer to the method embodiment, and details are not described herein again.

Optionally, the communication unit 520 is further configured to receive channel occupation time COT information from the network device, and the COT information is used to indicate information about a transmission time period preempted by the network device, and the transmission time period information includes a start time of the transmission time period And / or the duration of the transmission period.

Optionally, when the first control information is used to indicate an index of a relative subframe number for transmitting a random access signal, the processing unit 520 is further configured to determine, based on the COT information and an index of the relative subframe number, a method for transmitting the random access signal. Absolute subframe number; or, when the first control information is used to indicate an index of a relative slot number for transmitting a random access signal, the processing unit 520 is further configured to determine the transmission random access according to the COT information and the index of the relative slot number. The absolute time slot number of the incoming signal; or,

When the first control information is used to indicate an index of a relative OFDM symbol in which a random access signal is transmitted, the processing unit 520 is further configured to determine, according to the COT information and an index of a relative OFDM symbol, a signal in which the random access signal is transmitted. Absolute OFDM symbol.

For example, the relative subframe number is a relative subframe number in the COT, the relative slot number is a relative slot number in the COT, or the relative OFDM symbol is a relative OFDM symbol in the COT.

Optionally, the communication unit 610 is further configured to receive a demodulation reference signal DMRS or a tracking reference signal TRS of a physical broadcast channel PBCH from a network device, and the DMRS or TRS of the PBCH carries the COT information; or,

The communication unit 610 is further configured to receive the second control information from the network device, and the second control information carries the COT information.

Referring to FIG. 4, FIG. 4 is a schematic diagram of an apparatus 600 for transmitting a random access signal provided by the present application. As shown in FIG. 4, the device 600 includes a communication unit 610.

The communication unit 610 is configured to send system information to the terminal device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of the random access signal;

The communication unit 610 is further configured to send first control information to the terminal device, where the first control information is used to indicate a subframe number or a slot number or a start orthogonal frequency division multiplexing OFDM symbol for transmitting a random access signal.

The apparatus 600 corresponds exactly to the network device in the method embodiment, and the corresponding units of the apparatus 600 are configured to perform the corresponding steps performed by the network device in the above method 200 and its various embodiments. For example, the communication unit 610 in the apparatus 600 is configured to perform the steps of sending and / or receiving in the method embodiment. For example, the communication unit 610 performs step 210 of sending system information to the terminal device in FIG. 2, or performs step 220 of sending first control information to the terminal device. As another example, the communication unit 610 further performs a step of sending COT information or second control information to the terminal device.

Optionally, the apparatus 600 may also be a chip or an integrated circuit installed in a network device.

Optionally, when the apparatus 600 is a network device, the communication unit 610 may be a transceiver. The transceiver includes a transmitter and a receiver, which together implement the receiving and transmitting functions. Alternatively, when the device 600 is a chip or an integrated circuit installed in a network device, the communication unit 610 may also be an input / output interface.

Further, the apparatus 600 further includes a processing unit 620. The processing unit 620 is configured to execute steps in the device 600 that are performed by the device 600 except for receiving and sending. For example, the processing unit 620 is configured to generate system information, first control information, or second control information. Optionally, the processing unit 620 may be a processor.

Optionally, the communication unit 610 is further configured to send adjustment information to the terminal device. For the description of the adjustment information, refer to the method embodiment, and details are not described herein again.

Optionally, the communication unit 610 is further configured to send channel occupation time COT information to the terminal device, where the COT information is used to indicate information of a transmission time period preempted by the network device, and the information of the transmission time period includes the The start time of the transmission time period and / or the duration of the transmission time period.

Optionally, the communication unit 610 is further configured to send a demodulation reference signal DMRS or a tracking reference signal TRS of the physical broadcast channel PBCH to the terminal device, and the DMRS or TRS of the PBCH carries the COT information; or,

Send the second control information to the terminal device, and the second control information carries the COT information.

Referring to FIG. 5, FIG. 5 is a schematic structural block diagram of a terminal device 700 applicable to an embodiment of the present application. As shown in FIG. 5, the terminal device 700 includes: one or more processors 701, one or more memories 702, and one or more transceivers 703. The processor 701 is configured to control the transceiver 703 to send and receive signals, the memory 702 is configured to store a computer program, and the processor 701 is configured to call and run the computer program from the memory 702 to execute the method 200 for sending and receiving feedback information provided in the present application. And corresponding processes and / or operations performed by the terminal device in each embodiment. I won't repeat them here.

Referring to FIG. 6, FIG. 6 is a schematic structural block diagram of a network device 3000 applicable to an embodiment of the present application. As shown in FIG. 6, the network device 3000 may be applied to the wireless communication system shown in FIG. 1 described above, and performs the functions of the network device in the method embodiment of the present application. The network device 3000 may be, for example, a base station.

The network device 3000 may include one or more radio frequency units, such as a remote radio unit (RRU) 3100 and one or more baseband units (BBU). The baseband unit can also be referred to as a digital unit (DU) 3200. The RRU 3100 may be referred to as a transceiver unit, and corresponds to the communication unit 610 in FIG. 4. Optionally, the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 3101 and a radio frequency unit 3102. Optionally, the transceiver unit 3100 may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or a receiver or a receiving circuit), and the transmitting unit may correspond to a transmitter (or a transmitter or a transmitting circuit). The RRU 3100 part is mainly used to transmit and receive radio frequency signals and convert radio frequency signals to baseband signals, for example, to send system information, first control information, adjustment information, COT information, and second control information to a terminal device. The BBU 3200 part is mainly used for baseband processing and controlling base stations. The RRU 3100 and the BBU 3200 may be physically located together, or may be physically separated, that is, a distributed base station.

The BBU 3200 is the control center of the network equipment 3000, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) may be used to control the base station to execute the operation process performed by the network device in the foregoing method embodiment, for example, generating system information, first control information, adjustment information, COT information, or second control information.

In one example, the BBU 3200 may be composed of one or more boards, and multiple boards may jointly support a wireless access network (for example, an LTE network) of a single access system, or may separately support different access systems. Wireless access network (for example, LTE network, 5G network or other network). The BBU 3200 further includes a memory 3201 and a processor 3202. The memory 3201 is configured to store necessary instructions and data. The processor 3202 is configured to control the network device 3000 to perform necessary actions. For example, the processor 3202 is configured to control the network device 3000 to perform an operation process performed by the network device in the foregoing method embodiment. The memory 3201 and the processor 3202 may serve one or more single boards. That is, the memory and processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.

It should be understood that the network device 3000 shown in FIG. 6 can implement the functions of the network device involved in the method embodiment. The operations and / or functions of each unit in the network device 3000 are respectively to implement the corresponding processes performed by the network device in the method embodiment of the present application. To avoid repetition, detailed descriptions are appropriately omitted here.

The above BBU 3200 can be used to perform the actions implemented by the network device described in the foregoing method embodiments, for example, generating association relationship indication information. The RRU 3100 can be used to perform the actions that the network device described in the foregoing method embodiment sends to or receives from the terminal device. For example, system information, first control information, and the like are sent to the terminal device. For details, refer to the description in the foregoing method embodiment, and details are not described herein again.

In addition, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer is caused to execute a method for transmitting a random access signal according to an embodiment of the present application. Corresponding operations and / or processes performed by the terminal device in the method 200 and its various embodiments.

The present application also provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer causes the computer to execute the method 200 for transmitting a random access signal according to the embodiments of the present application and implementations thereof. The corresponding operations and / or processes performed by the terminal device in the example.

The present application also provides a chip, including a processor. The processor is configured to read and run a computer program stored in a memory to execute the method 200 for transmitting a random access signal provided in the present application and corresponding operations and / or processes performed by a terminal device in various embodiments. Optionally, the chip further includes a memory connected to the processor, and the processor is configured to read and execute a computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is configured to receive data and / or information to be processed, and the processor obtains the data and / or information from the communication interface and processes the data and / or information. The communication interface may be an input-output interface.

In addition, the present application provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer is caused to execute a method for transmitting a random access signal according to an embodiment of the present application. The corresponding operations and / or processes performed by the network device in 200 and its various embodiments.

The present application also provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer causes the computer to execute the method 200 for transmitting a random access signal according to the embodiments of the present application and implementations thereof. The corresponding operations and / or processes performed by the network devices in the example.

The present application also provides a chip, including a processor. The processor is configured to call and run a computer program stored in the memory to execute the method 200 for sending and receiving feedback information in the embodiments of the present application and corresponding operations and / or processes performed by network devices in the embodiments. Optionally, the chip further includes a memory connected to the processor, and the processor is configured to read and execute a computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is configured to receive data and / or information to be processed, and the processor obtains the data and / or information from the communication interface and processes the data and / or information. The communication interface may be an input-output interface.

In the above embodiments, the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more technologies for controlling the present application. Integrated circuit of program execution. For example, the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, and the like. The processor may allocate control and signal processing functions of the terminal device or network device among these devices according to their respective functions. In addition, the processor may have a function of operating one or more software programs, and the software programs may be stored in a memory. The functions of the processor may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

The memory can be read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types of information and instructions that can store Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM-ready-only memory (EEPROM)), read-only compact discs (compact disc-read-only memory (CD-ROM)) or other optical disc storage, optical disc storage (CD-ROM) (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or they can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media etc. accessed by the computer.

Optionally, the memory and the memory involved in the foregoing embodiments may be physically independent units, or the memory may also be integrated with the processor.

Those of ordinary skill in the art may realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

In several embodiments provided in this application, the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be another division manner in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may not be physically separated, and the components displayed as units may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solution of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .

The above is only a specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (34)

1. A method for transmitting a random access signal, comprising:

   The terminal device receives system information from a network device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of a random access signal;

   Receiving, by the terminal device, first control information from the network device, where the first control information is used to indicate a subframe number or a slot number or a starting orthogonal frequency division multiplexing OFDM symbol for transmitting the random access signal .
2. The method according to claim 1, further comprising:

   Determining, by the terminal device, a first time unit for sending the random access signal in a first period according to the system information and the first control information, and the first period is the random number indicated by the system information Any one of the transmission periods of the access signal, the first period includes at least two time units;

   The terminal device monitors a channel on at least two time units included in the first period;

   When the channel is successfully monitored on a second time unit located before the first time unit in the first cycle, the terminal device determines the second time unit as sending the random in the first cycle The time unit of the access signal.
3. The method according to claim 1, further comprising:

   Determining, by the terminal device, a first time unit for sending the random access signal in a first period according to the system information and the first control information, and the first period is the random number indicated by the system information Any one of the transmission periods of the access signal, the first period includes at least two time units;

   The terminal device monitors a channel on at least two time units included in the first period;

   When the monitoring channel fails on the first time unit in the first period, the terminal device determines a third time unit located after the first time unit and adjacent to the first time unit as A time unit for sending the random access signal in the first period.
4. The method according to claim 2 or 3, further comprising:

   The terminal device receives adjustment information from the network device, and the adjustment information is used to instruct to adjust a first time unit for transmitting the random access signal in the first period to a fourth time unit, and the fourth time unit A time unit is located within the first period.
5. The method according to any one of claims 1-4, wherein the random access signal has multiple candidate transmission formats, and each of the multiple candidate transmission formats is in the random The proportion occupied in the access signal configuration table is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.
6. The method according to any one of claims 1-5, wherein the first control information is specifically used to indicate:

   An index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is an index of an absolute subframe number or a relative subframe number; or,

   An index of one or more timeslot numbers for transmitting the random access signal, and the index of the one or more timeslot numbers is an index of an absolute timeslot number or a relative timeslot number; or,

   An index of one or more OFDM symbols of the random access signal is transmitted, and the index of the one or more OFDM symbols is an index of an absolute OFDM symbol or a relative OFDM symbol.
7. The method according to claim 6, further comprising:

   Receiving, by the terminal device, channel occupation time COT information from the network device, where the COT information is used to indicate information of a transmission time period preempted by the network device, and the information of the transmission time period includes information of the transmission time period The start time and / or the duration of the transmission time period.
8. The method according to claim 7, further comprising:

   When the first control information is used to indicate an index of a relative subframe number for transmitting the random access signal, the terminal device determines to transmit the random according to the COT information and the index of the relative subframe number. The absolute subframe number of the access signal; or,

   When the first control information is used to indicate an index of a relative slot number for transmitting the random access signal, the terminal device determines to transmit the random according to the COT information and the index of the relative slot number. The absolute time slot number of the access signal; or

   When the first control information is used to indicate an index of a relative OFDM symbol for transmitting the random access signal, the terminal device determines to transmit the random access according to the COT information and the index of the relative OFDM symbol. The absolute OFDM symbol of the signal.
9. The method according to claim 7 or 8, wherein the COT information includes one or more bits, and the terminal device receives the COT information from the network device, comprising:

   Receiving, by the terminal device, a demodulation reference signal DMRS or a tracking reference signal TRS of a physical broadcast channel PBCH from the network device, and the DMRS or TRS of the PBCH carries the COT information; or,

   The terminal device receives second control information from the network device, and the second control information carries the COT information.
10. A method for transmitting a random access signal, comprising:

    The network device sends system information to the terminal device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of the random access signal;

    Sending, by the network device, first control information to the terminal device, where the first control information is used to indicate a subframe number or a slot number or a starting orthogonal frequency division multiplexing OFDM symbol for transmitting the random access signal .
11. The method according to claim 10, further comprising:

    The network device sends adjustment information to the terminal device, where the adjustment information is used to indicate that a first time unit for transmitting the random access signal in a first cycle is adjusted to a fourth time unit, and the first cycle is Any one of the transmission periods of the random access signal indicated by the system information, the first period includes at least two time units, and the first time unit and the fourth time unit belong to the first cycle.
12. The method according to claim 10 or 11, wherein the random access signal has a plurality of candidate transmission formats, and each of the plurality of candidate transmission formats is in the random access signal. The proportion in the configuration table is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.
13. The method according to any one of claims 10-12, wherein the first control information is specifically used to indicate:

    An index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is an index of an absolute subframe number or a relative subframe number; or,

    An index of one or more timeslot numbers for transmitting the random access signal, and the index of the one or more timeslot numbers is an index of an absolute timeslot number or a relative timeslot number; or,

    Transmitting an index of one or more OFDM symbols of the random access signal, and the index of the one or more OFDM symbols is an index of an absolute OFDM symbol or a relative OFDM symbol.
14. The method according to claim 13, further comprising:

    The network device sends channel occupation time COT information to the terminal device, where the COT information is used to indicate information of a transmission time period preempted by the network device, and the information of the transmission time period includes information about the transmission time period. The start time and / or the duration of the transmission time period.
15. The method according to claim 14, wherein the COT information includes one or more bits, and the network device sends the COT information to the terminal device, comprising:

    Sending, by the network device, the demodulation reference signal DMRS or tracking reference signal TRS of a physical broadcast channel PBCH to the terminal device, and the DMRS or TRS of the PBCH carries the COT information; or,

    The network device sends second control information to the terminal device, and the second control information carries the COT information.
16. A device for transmitting a random access signal, comprising:

    A communication unit, configured to receive system information from a network device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of a random access signal;

    The communication unit is further configured to receive first control information from the network device, where the first control information is used to indicate a subframe number or a slot number or a starting orthogonal frequency division for transmitting the random access signal. Multiplexing OFDM symbols.
17. The device according to claim 16, further comprising:

    A processing unit, configured to determine, according to the system information and the first control information, a first time unit for sending the random access signal in a first period, where the first period is the one indicated by the system information Any one of the transmission periods of the random access signal, the first period includes at least two time units;

    The communication unit is further configured to monitor a channel on at least two time units included in the first cycle;

    The processing unit is further configured to, when determining that the communication unit successfully monitors a channel on a second time unit located between the first time units within the first period, determine the second time unit as A time unit for sending the random access signal in the first period.
18. The device according to claim 16, further comprising:

    A processing unit, configured to determine, according to the system information and the first control information, a first time unit for sending the random access signal in a first period, where the first period is the one indicated by the system information Any one of the transmission periods of the random access signal, the first period includes at least two time units;

    The communication unit is further configured to monitor a channel on at least two time units included in the first cycle;

    The processing unit is further configured to, when it is determined that the communication unit fails to listen to the channel on the first time unit, a third time that is located after the first time unit and adjacent to the first time unit The unit is determined as a time unit for sending the random access signal in the first period.
19. The device according to claim 17 or 18, wherein the device further comprises:

    The communication unit is further configured to receive adjustment information from the network device, where the adjustment information is used to instruct to adjust a first time unit transmitting the random access signal in the first period to a fourth time unit, The fourth time unit is located within the first period.
20. The apparatus according to any one of claims 16 to 19, wherein the random access signal has multiple candidate transmission formats, and each of the multiple candidate transmission formats is in the random The proportion occupied in the access signal configuration table is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.
21. The device according to any one of claims 16-20, wherein the first control information is specifically used to indicate:

    An index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is an index of an absolute subframe number or a relative subframe number; or,

    An index of one or more timeslot numbers for transmitting the random access signal, and the index of the one or more timeslot numbers is an index of an absolute timeslot number or a relative timeslot number; or,

    Transmitting an index of one or more OFDM symbols of the random access signal, and the index of the one or more OFDM symbols is an index of an absolute OFDM symbol or a relative OFDM symbol.
22. The apparatus according to claim 21, wherein the communication unit is further configured to:

    Receiving channel occupation time COT information from the network device, where the COT information is used to indicate information of a transmission time period preempted by the network device, and the transmission time period information includes a start time of the transmission time period and And / or the duration of the transmission time period.
23. The apparatus according to claim 22, wherein the processing unit is further configured to:

    When the first control information is used to indicate an index of a relative subframe number for transmitting the random access signal, determining a transmission rate of the random access signal according to the COT information and the index of the relative subframe number. Absolute subframe number; or,

    When the first control information is used to indicate an index of a relative time slot number for transmitting the random access signal, determining a method for transmitting the random access signal according to the COT information and the index of the relative time slot number. Absolute time slot number; or,

    When the first control information is used to indicate an index of a relative OFDM symbol that transmits the random access signal, an absolute OFDM that transmits the random access signal is determined according to the COT information and the index of the relative OFDM symbol. symbol.
24. The apparatus according to claim 22 or 23, wherein the COT information includes one or more bits, and the communication unit is specifically configured to:

    Receiving a demodulation reference signal DMRS or a tracking reference signal TRS of a physical broadcast channel PBCH from the network device, and the DMRS or TRS of the PBCH carries the COT information;

    Receiving second control information from the network device, where the second control information carries the COT information.
25. A device for transmitting a random access signal, comprising:

    A communication unit, configured to send system information to a terminal device, where the system information is used to indicate one or more of a transmission cycle, a transmission format, and a system frame number of a random access signal;

    The communication unit is further configured to send first control information to the terminal device, where the first control information is used to indicate a subframe number or a slot number or a starting orthogonal frequency division for transmitting the random access signal. Multiplexing OFDM symbols.
26. The apparatus according to claim 25, wherein the communication unit is further configured to:

    Sending adjustment information to the terminal device, where the adjustment information is used to indicate that a first time unit for transmitting the random access signal in a first cycle is adjusted to a fourth time unit, and the first cycle is the system information Any one of the indicated transmission periods of the random access signal, the first period includes at least two time units, and the first time unit and the fourth time unit belong to the first period.
27. The apparatus according to claim 25 or 26, wherein the random access signal has multiple candidate transmission formats, and each of the multiple candidate transmission formats is in the random access signal. The proportion in the configuration table is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.
28. The apparatus according to any one of claims 25-27, wherein the first control information is specifically used to indicate:

    An index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is an index of an absolute subframe number or a relative subframe number; or,

    An index of one or more timeslot numbers for transmitting the random access signal, and the index of the one or more timeslot numbers is an index of an absolute timeslot number or a relative timeslot number; or,

    Transmitting an index of one or more OFDM symbols of the random access signal, and the index of the one or more OFDM symbols is an index of an absolute OFDM symbol or a relative OFDM symbol.
29. The apparatus according to claim 28, wherein the communication unit is further configured to:

    Sending channel occupation time COT information to the terminal device, where the COT information is used to indicate information of a transmission time period preempted by the network device, and the transmission time period information includes a start time of the transmission time period and And / or the duration of the transmission time period.
30. The apparatus according to claim 29, wherein the COT information includes one or more bits, and the communication unit is configured to:

    Sending the demodulation reference signal DMRS or tracking reference signal TRS of the physical broadcast channel PBCH to the terminal device, and the DMRS or TRS of the PBCH carries the COT information; or,

    Sending second control information to the terminal device, where the second control information carries the COT information.
31. A computer-readable storage medium, characterized in that computer instructions are stored in the computer-readable storage medium, and when the computer instructions are run on a computer, the computer causes the computer to execute the method according to any one of claims 1-9. The method described.
32. A computer-readable storage medium, characterized in that computer instructions are stored in the computer-readable storage medium, and when the computer instructions are run on a computer, the computer causes the computer to execute the method according to any one of claims 10-15. The method described.
33. A chip is characterized in that it includes a memory and a processor, where the memory is used to store a computer program, the processor is used to read and execute the computer program stored in the memory, and when the computer program is executed When the processor executes the method according to any one of claims 1-9.
34. A chip is characterized in that it includes a memory and a processor, where the memory is used to store a computer program, the processor is used to read and execute the computer program stored in the memory, and when the computer program is executed When the processor executes the method according to any one of claims 10-15.

Images