CN112654098B - Random access method, information sending method, terminal and network equipment - Google Patents
Random access method, information sending method, terminal and network equipment Download PDFInfo
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Abstract
The invention provides a random access method, an information sending method, a terminal and network equipment, wherein the random access method comprises the following steps: receiving first indication information from a network device; adopting a corresponding LBT type to carry out channel interception according to the first indication information; and carrying out random access when the channel is sensed to be empty. The embodiment of the invention can lead the terminal for random access to flexibly adopt the LBT type obtained based on the indication of the network equipment to carry out channel interception, thereby reducing the time delay of PRACH sending information and improving the random access efficiency.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a random access method, an information sending method, a terminal, and a network device.
Background
In an unlicensed frequency band, a terminal, such as a User Equipment (UE), needs to listen to a channel first by Listen Before Talk (LBT) of type 4 (category 4) when initially accessing, and then perform random access when it is monitored that the channel is empty. Therefore, when the conventional UE performs random access, it may not be able to send relevant information such as a random access preamble in time, which causes low random access efficiency.
Disclosure of Invention
The embodiment of the invention provides a random access method, an information sending method, a terminal and network equipment, and aims to solve the problem that the random access efficiency of the conventional terminal in an unauthorized frequency band is low.
In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:
in a first aspect, an embodiment of the present invention provides a random access method, applied to a terminal, including:
receiving first indication information from a network device;
adopting a corresponding LBT type to carry out channel interception according to the first indication information;
and carrying out random access when the channel is sensed to be empty.
In a second aspect, an embodiment of the present invention provides an information sending method, which is applied to a network device, and includes:
sending first indication information to a terminal;
the first indication information is used for the terminal to obtain an LBT type adopted by channel sensing before random access.
In a third aspect, an embodiment of the present invention provides a terminal, including:
a receiving module, configured to receive first indication information from a network device;
the interception module is used for adopting a corresponding LBT type to carry out channel interception according to the first indication information;
and the random access module is used for carrying out random access when the channel is monitored to be empty.
In a fourth aspect, an embodiment of the present invention provides a network device, including:
the sending module is used for sending first indication information to the terminal;
the first indication information is used for the terminal to obtain an LBT type adopted by channel sensing before random access.
In a fifth aspect, an embodiment of the present invention provides a communication device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program implements the steps of the above random access method or implements the steps of the above information sending method when executed by the processor. The communication device may be a terminal or a network device.
In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the above random access method or implements the steps of the above information sending method.
In the embodiment of the invention, the first indication information is received from the network equipment, the corresponding LBT type is adopted for channel interception according to the first indication information, and random access is carried out when the channel is intercepted to be empty, so that the terminal for carrying out random access can flexibly adopt the LBT type obtained based on the indication of the network equipment for channel interception, thereby reducing the time delay of PRACH (physical random access channel) sending information and improving the random access efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a flow chart of a random access method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for sending messages according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 6 is a second schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
In order to facilitate understanding of the embodiments of the present invention, the following is first explained.
The unlicensed band (unlicensed band) can be used as a supplement to the licensed band (licensed band) to help the operator to expand the service. In order to keep pace with New Radio (NR) deployments and maximize NR-based unlicensed access as much as possible, unlicensed bands may operate in the 5GHz, 37GHz, and 60GHz bands. The large bandwidth (80 MHz or 100 MHz) of the unlicensed band can reduce the implementation complexity of the base station and the UE. Since the unlicensed frequency band is shared by multiple technologies (RATs), such as WiFi, radar, LTE-LAA, etc., in some countries or regions, the unlicensed frequency band must meet rules (regulations) when being used, so as to ensure that all devices can fairly use the resources, such as LBT (listen before talk), maximum Channel Occupancy Time (MCOT), etc. When a transmission node needs to send information, LBT needs to be performed first, power detection (ED) is performed on surrounding nodes, and when the detected power is lower than a threshold, a channel is considered to be empty (idle), and the transmission node can send. Otherwise, the channel is considered to be busy, and the transmitting node cannot transmit. The transmission node may be a base station, a UE, a WiFi Access Point (AP), and so on. After the transmission node starts transmission, the occupied channel time COT cannot exceed the MCOT.
Among them, the type of LBT (category) can be classified into category1, category 2 and category4.Category1 LBT is that a transmitting node does not do LBT, i.e. no LBT or direct transmission (immediate transmission). The Category 2LBT is a one-shot LBT, that is, the transmission node performs LBT once before transmission, and transmits if the channel is empty, and does not transmit if the channel is busy. The Category 4LBT is a back-off (back-off) based channel sensing mechanism, and when a transmission node senses that a channel is busy, the node performs back-off and continues sensing until the channel is sensed to be empty. Category 4LBT contains a variety of priorities, with different maximum channel occupancy times for each priority. As shown in tables 1 and 2 below.
TABLE 1 Channel Access Priority (Channel Access Priority Class)
TABLE 2 uplink channel Access priority
Wherein, T in the above Table 1 mcot,p And indicating the maximum channel occupation time of the downlink transmission of the corresponding priority p. T in the above Table 2 ulmcot,p And represents the maximum channel occupation time of the uplink transmission of the corresponding priority p. m is p Indicating the coefficient corresponding to the respective priority p. CW p Indicating the value of the contention window corresponding to the respective priority p. CW min,p Indicating the minimum value of the contention window corresponding to the respective priority p. CW max,p Indicating the maximum value of the contention window corresponding to the respective priority p.
Various different types of Physical Random Access Channel (PRACH) preamble formats (PRACH preamble formats) are defined in the NR, and the different formats correspond to different preamble sequence lengths, interval CP lengths, time domain lengths, and the like and are suitable for different coverage ranges. Wherein the total duration of the PRACH of the various formats is different. For each PRACH preamble format. The priority of access to its corresponding channel may be agreed upon. For each cell, the network may configure one PRACH preamble format,64 preamble sequences, where the 64 preambles correspond to different cyclic shift values and the same or different root sequence numbers.
Optionally, the wireless communication system in the embodiment of the present invention includes a terminal and a network device. The terminal may also be referred to as a terminal Device or a UE, where the terminal may be a terminal-side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and a specific type of the terminal is not limited in the embodiment of the present invention. The network device may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), and the Base Station may be referred to as a node B, an enodeb, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, and is not limited to a specific terminology as long as the same technical effect is achieved.
The embodiment of the invention is suitable for the scene of the terminal randomly accessing the network equipment, and further, the random access process of the terminal can be an initial access process triggered by the network equipment. For example, the network device may trigger an initial access procedure of the terminal through Control information in a Physical Downlink Control Channel (PDCCH).
Referring to fig. 1, fig. 1 is a flowchart of a random access method according to an embodiment of the present invention, where the method is applied to a terminal, and as shown in fig. 1, the method includes the following steps:
step 101: first indication information is received from a network device.
Optionally, the first indication information may indicate at least one of:
the LBT type of the terminal;
a remaining Time of a Channel Occupancy Time (COT) of the network device;
end time of COT of network device.
In one embodiment, in the case that it is determined by the network device whether to allow the terminal to share its own COT, the first indication information indicates an LBT type of the terminal, that is, indicates the LBT type at the time of random access to the terminal, so that the terminal may share the COT of the network device if appropriate.
In another embodiment, in case that it is determined by the terminal whether to share the COT of the network device, the first indication information may indicate at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, so as to determine, by the terminal, whether to share the COT of the network device according to the COT related information of the network device.
In another embodiment, the first indication information may be: the network device sends to the terminal at the same time when triggering a Random Access (RACH) procedure of the terminal.
Step 102: and adopting the corresponding LBT type to carry out channel interception according to the first indication information.
Optionally, the LBT type used in this step may be LBT type 2 or LBT type 4. The LBT type 2 is a one-shot LBT, that is, when it is sensed that the channel is empty, transmission is performed, otherwise, transmission is not performed. The LBT type 4 is a back-off (back-off) based channel sensing mechanism, i.e. performing back-off when sensing that the channel is busy, and continuing channel sensing until sensing that the channel is empty.
Optionally, in the case of sharing the COT of the network device, the terminal performs channel sensing by using LBT type 2; and under the condition of not sharing the COT of the network equipment, the terminal adopts the LBT type 4 to carry out channel sensing. In this way, since the LBT type 2 can be a short-duration fast listening mode, the terminal can use the shared COT to quickly initiate a random access process under the condition of sharing the COT of the network device, thereby reducing the time delay of information transmission and improving the random access efficiency.
Step 103: and carrying out random access when the channel is sensed to be empty.
The random access method of the embodiment of the invention receives the first indication information from the network equipment, adopts the corresponding LBT type to carry out channel interception according to the first indication information, and carries out random access when the intercepted channel is empty, so that the terminal carrying out random access can flexibly adopt the LBT type obtained based on the indication of the network equipment to carry out channel interception, thereby reducing the time delay of PRACH (physical random access channel) sending information and improving the random access efficiency.
In this embodiment of the present invention, the LBT type of the terminal indicated by the first indication information may be LBT type 2 or LBT type 4. When the network equipment allows the terminal to share the COT of the terminal, the first indication information indicates the LBT type 2; and when the network device does not allow the terminal to share its own COT, the first indication information indicates LBT type 4.
Optionally, when the first indication information indicates at least one of the remaining time of the COT of the network device and the end time of the COT of the network device, the terminal may determine whether to share the COT of the network device according to a location of a random access opportunity (RACH occasion, RO) in a time domain or a relationship between a random access resource of the location and the remaining time of the COT of the network device, and perform channel sensing by using an LBT type 2 when determining the COT of the shared network device, or perform channel sensing by using an LBT type 4 when determining that the COT of the network device is not shared. Therefore, the terminal can use the shared COT to quickly initiate the random access process under the condition of sharing the COT of the network equipment, thereby reducing the time delay of information transmission and improving the random access efficiency.
Further, the step 102 may include:
1) Channel sensing is performed with LBT type 2 in any of the following cases:
the position of the random access opportunity in the time domain is in the residual time of the COT of the network equipment;
there is at least one full segment of contiguous random access resources for the remaining time of the COT of the network device.
2) Or, channel sensing is performed with LBT type 4 in any of the following cases:
the position of the random access opportunity in the time domain is outside the residual time of the COT of the network equipment;
at least a portion of the consecutive random access resources are outside of a remaining time of a COT of the network device.
It can be understood that, after obtaining the end time of the COT to the network device, the terminal may determine the remaining time of the COT of the network device based on the interaction situation with the network device, and the like.
For example, assuming that the gNB indicates the remaining time of the COT or the end time of the COT of the gNB to the UE when triggering the RACH procedure of the UE, the UE may determine whether to share the COT of the gNB according to a relationship between a position of the own RO in the time domain and the remaining time of the COT or the end time of the COT of the gNB. And if the position of the RO of the UE in the time domain is within the residual time of the COT of the gNB, the UE adopts LBT type 2 (Cat 2) to perform channel sensing, and performs random access when the sensed channel is empty. And if the position of the RO of the UE in the time domain is outside the remaining time of the COT of the gNB, the UE performs channel sensing by using LBT type 4 (Cat 4), and performs random access when sensing that the channel is empty. At this time, the priority of LBT type 4 is determined by the UE itself, and different priorities may be adopted according to the configured PRACH preamble format. For example, the PRACH preamble format 1 or PRACH preamble format 2 employs priority 2, and the other PRACH preamble formats employ priority 1.
In addition, the UE may also determine whether to share the COT of the gNB according to whether at least one complete continuous RACH resource falls within the remaining time of the COT of the gNB. And if the UE has at least one complete continuous RACH resource within the residual time of the COT of the gNB, the UE adopts LBT type 2 for channel sensing and shares the COT of the gNB. Preferably, the UE uses LBT type 2 for channel sensing only when it transmits PRACH on the RO within the first segment of consecutive RACH resources after receiving the trigger indication. And if at least one part of the continuous RACH resources of the UE is beyond the residual time of the COT of the gNB, namely the position of the RO in at least one RACH resource in the time domain is beyond the residual time of the COT of the gNB, the UE adopts LBT type 4 to perform channel sensing, and performs random access when sensing that the channel is empty. The priority of LBT type 4 is now decided by the UE itself.
Referring to fig. 2, fig. 2 is a flowchart of an information sending method according to an embodiment of the present invention, where the method is applied to a network device, and as shown in fig. 2, the method includes the following steps:
step 201: and sending the first indication information to the terminal.
The first indication information is used for the terminal to obtain the LBT type adopted by the channel sensing before random access. In this way, the terminal may perform channel sensing using the corresponding LBT type, and perform random access when sensing that the channel is empty.
Optionally, the first indication information may indicate at least one of:
the LBT type of the terminal;
the remaining time of the COT of the network device;
end time of COT of network device.
In one embodiment, in the case that it is determined by the network device whether to allow the terminal to share its own COT, the first indication information indicates an LBT type of the terminal, that is, indicates the LBT type at the time of random access to the terminal, so that the terminal can share the COT of the network device.
In another embodiment, in the case that it is determined by the terminal whether to share the COT of the network device, the first indication information may indicate at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, so as to determine, by the terminal, whether to share the COT of the network device according to the COT related information of the network device.
In another embodiment, the first indication information may be: the network device sends to the terminal at the same time when triggering a Random Access (RACH) procedure of the terminal.
The random access method of the embodiment of the invention can enable the terminal which carries out the random access to adopt the corresponding LBT type to carry out the channel interception by sending the first indication information to the terminal, and carry out the random access when the intercepted channel is empty, thus the terminal which carries out the random access can use the shared COT to rapidly initiate the random access process under the condition of sharing the COT of the network equipment, thereby reducing the time delay of the PRACH sending information and improving the random access efficiency.
Optionally, the LBT type of the terminal indicated by the first indication information may be LBT type 2 or LBT type 4. When the network equipment allows the terminal to share the COT of the terminal, the first indication information indicates the LBT type 2; and when the network device does not allow the terminal to share its COT, the first indication information indicates LBT type 4.
In an embodiment, for the RACH procedure triggered by PDCCH order indication, the gNB may indicate the LBT type of the RACH procedure initiated by the UE through indication Information in Downlink Control Information (DCI). The indication information may be a newly added field in the DCI or an existing field in the DCI, where the existing field has a re-interpretation. For example, the LBT type may be indicated by an Uplink (UL) or an additional uplink (SUL) indicator bit (UL/SUL indicator) or reserved bits (reserved bits) in DCI format 1_0. When receiving DCI format 1_0 triggering RACH procedure, the UE defaults to 1 bit of UL/SUL indicator or 1 bit of reserved bits indicates whether the type of LBT is type 2 or type 4.
Optionally, when the first indication information indicates the LBT type of the terminal, the network device may determine whether to allow the terminal to share its own COT according to whether all of the consecutive RACH resources configured for the terminal fall within the remaining time of its own COT, and indicate the LBT type of random access to the terminal. That is, in case that at least one complete continuous random access resource is included in the remaining time of the COT of the network device, the first indication information indicates LBT type 2; or, in case that there is no complete continuous random access resource for the remaining time of the COT of the network device, the first indication information indicates LBT type 4.
For example, assume that the gNB simultaneously indicates the LBT type of random access to the UE when triggering the RACH procedure of the UE. If at least one complete continuous RACH resource is contained in the remaining time of the COT of the gNB, that is, the positions of all the ROs in the time domain in the continuous RACH resource all fall within the remaining time of the COT of the gNB, the gNB allows the UE to share the COT thereof, and sends indication information indicating LBT type 2 to the UE. After receiving the indication information, the UE may perform channel sensing according to the indication information by using LBT type 2, and perform random access when sensing that the channel is empty. Preferably, the UE uses LBT type 2 for channel sensing only when transmitting PRACH on the RO in the first continuous segment of RACH resources after receiving the trigger indication.
In addition, if there is no complete continuous random access resource in the remaining time of the COT of the gNB, that is, the time domain positions of all RO resources in any complete segment of continuous RACH resources fall within the remaining time of the COT of the gNB, the gNB does not allow the UE to share its COT, and transmits indication information indicating LBT type 4 to the UE. After receiving the indication information, the UE may perform channel sensing according to the indication information by using LBT type 4, and perform random access when sensing that the channel is empty. The priority of LBT type 4 is determined by UE, and different priorities may be adopted according to configured PRACH preamble format. For example, the PRACH preamble format 1 or PRACH preamble format 2 employs priority 2, and the other PRACH preamble formats employ priority 1.
The above embodiments describe the random access and information transmission method of the present invention, and the terminal and the network device of the present invention are described below with reference to the embodiments and the drawings.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 3, the terminal 30 includes:
a receiving module 31, configured to receive first indication information from a network device;
the interception module 32 is configured to perform channel interception by using a corresponding LBT type according to the first indication information;
and a random access module 33, configured to perform random access when it is sensed that the channel is empty.
Optionally, the first indication information indicates at least one of:
the LBT type of the terminal;
a remaining time of the COT of the network device;
an end time of the COT of the network device.
Optionally, the LBT type is LBT type 2 or LBT type 4.
Optionally, when the first indication information indicates at least one of the remaining time of the COT of the network device and the end time of the COT of the network device, the listening module 32 is specifically configured to:
channel sensing is performed with LBT type 2 in any of the following cases:
the position of the random access opportunity in the time domain is within the remaining time of the COT of the network equipment;
having at least one full segment of contiguous random access resources for the remaining time of the COT of the network device;
alternatively, the first and second electrodes may be,
channel sensing is performed with LBT type 4 in any of the following cases:
the position of the random access opportunity in the time domain is beyond the residual time of the COT of the network equipment;
at least a portion of the consecutive random access resources are outside a remaining time of the COT of the network device.
The terminal 30 of the embodiment of the present invention may implement each process implemented in the method embodiment shown in fig. 1 and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 4, the network device 40 includes:
a sending module 41, configured to send first indication information to a terminal;
the first indication information is used for the terminal to obtain an LBT type adopted by channel sensing before random access.
Optionally, the first indication information indicates at least one of:
a LBT type of the terminal;
a remaining time of the COT of the network device;
an end time of the COT of the network device.
Optionally, when the first indication information indicates the LBT type of the terminal,
in the case that at least one complete segment of continuous random access resources is included in the remaining time of the COT of the network device, the first indication information indicates LBT type 2;
or, in case that there is no complete continuous random access resource within the remaining time of the COT of the network device, the first indication information indicates LBT type 4.
The network device 40 in the embodiment of the present invention may implement each process implemented in the method embodiment shown in fig. 2 and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
An embodiment of the present invention further provides a communication device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the method embodiment shown in fig. 1 or fig. 2, and can achieve the same technical effect, and is not described herein again to avoid repetition. Alternatively, the communication device may be a terminal or a network device.
Referring to fig. 5, fig. 5 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 500 includes, but is not limited to: radio frequency unit 501, network module 502, audio output unit 503, input unit 504, sensor 505, display unit 506, user input unit 507, interface unit 508, memory 509, processor 510, and power supply 511. Those skilled in the art will appreciate that the terminal configuration shown in fig. 5 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The radio frequency unit 501 is configured to receive first indication information from a network device;
a processor 510, configured to perform channel sensing with a corresponding LBT type according to the first indication information; and performing random access when the channel is sensed to be empty.
The terminal 500 according to the embodiment of the present invention may implement each process implemented in the method embodiment shown in fig. 1 and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 501 may be used for receiving and sending signals during a process of sending and receiving information or a call, and specifically, receives downlink data from a base station and then processes the downlink data to the processor 510; in addition, uplink data is transmitted to the base station. In general, radio frequency unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 501 can also communicate with a network and other devices through a wireless communication system.
The terminal provides wireless broadband internet access to the user through the network module 502, such as helping the user send and receive e-mails, browse web pages, access streaming media, and the like.
The audio output unit 503 may convert audio data received by the radio frequency unit 501 or the network module 502 or stored in the memory 509 into an audio signal and output as sound. Also, the audio output unit 503 may also provide audio output related to a specific function performed by the terminal 500 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 503 includes a speaker, a buzzer, a receiver, and the like.
The input unit 504 is used to receive an audio or video signal. The input Unit 504 may include a Graphics Processing Unit (GPU) 5041 and a microphone 5042, and the Graphics processor 5041 processes image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 506. The image frames processed by the graphic processor 5041 may be stored in the memory 509 (or other storage medium) or transmitted via the radio frequency unit 501 or the network module 502. The microphone 5042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 501 in case of the phone call mode.
The terminal 500 also includes at least one sensor 505, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 5061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 5061 and/or a backlight when the terminal 500 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer and tapping), and the like; the sensor 505 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.
The display unit 506 is used to display information input by the user or information provided to the user. The Display unit 506 may include a Display panel 5061, and the Display panel 5061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 507 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 507 includes a touch panel 5071 and other input devices 5072. Touch panel 5071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 5071 using a finger, stylus, or any suitable object or attachment). The touch panel 5071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 510, and receives and executes commands sent by the processor 510. In addition, the touch panel 5071 may be implemented in various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to touch panel 5071, user input unit 507 may include other input devices 5072. In particular, other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 5071 may be overlaid on the display panel 5061, and when the touch panel 5071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 510 to determine the type of the touch event, and then the processor 510 provides a corresponding visual output on the display panel 5061 according to the type of the touch event. Although in fig. 5, the touch panel 5071 and the display panel 5061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 5071 and the display panel 5061 may be integrated to implement the input and output functions of the terminal, and is not limited herein.
The interface unit 508 is an interface for connecting an external device to the terminal 500. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 508 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the terminal 500 or may be used to transmit data between the terminal 500 and external devices.
The memory 509 may be used to store software programs as well as various data. The memory 509 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 509 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 510 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 509 and calling data stored in the memory 509, thereby performing overall monitoring of the terminal. Processor 510 may include one or more processing units; preferably, the processor 510 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 510.
The terminal 500 may further include a power supply 511 (e.g., a battery) for supplying power to various components, and preferably, the power supply 511 may be logically connected to the processor 510 through a power management system, so that functions of managing charging, discharging, and power consumption are performed through the power management system.
In addition, the terminal 500 may further include some functional modules that are not shown, and are not described in detail herein.
Referring to fig. 6, fig. 6 is a schematic diagram of a hardware structure of a network device for implementing various embodiments of the present invention, where the network device 60 includes, but is not limited to: bus 61, transceiver 62, antenna 63, bus interface 64, processor 65, and memory 66.
In this embodiment of the present invention, the network device 60 further includes: a computer program stored on the memory 66 and executable on the processor 65. Optionally, the computer program when executed by the processor 65 implements the steps of:
sending first indication information to a terminal;
the first indication information is used for the terminal to obtain an LBT type adopted by channel sensing before random access.
A transceiver 62 for receiving and transmitting data under the control of a processor 65.
The network device 60 according to the embodiment of the present invention may implement each process implemented in the method embodiment shown in fig. 2 and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
In fig. 6, a bus architecture (represented by bus 61), bus 61 may include any number of interconnected buses and bridges, bus 61 linking together various circuits including one or more processors, represented by processor 65, and memory, represented by memory 66. The bus 61 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 64 provides an interface between the bus 61 and the transceiver 62. The transceiver 62 may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 65 is transmitted over a wireless medium via the antenna 63, and further, the antenna 63 receives the data and transmits the data to the processor 65.
The processor 65 is responsible for managing the bus 61 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 66 may be used to store data used by the processor 65 in performing operations.
Alternatively, the processor 65 may be a CPU, ASIC, FPGA or CPLD.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method embodiment shown in fig. 1 or fig. 2, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium is, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A random access method applied to a terminal is characterized by comprising the following steps:
receiving first indication information from a network device;
adopting a corresponding Listen Before Talk (LBT) type to carry out channel interception according to the first indication information;
when the channel is monitored to be empty, random access is carried out;
wherein, when the first indication information indicates at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, the performing, according to the first indication information, channel sensing by using a corresponding listen before talk LBT type includes: channel sensing is performed with LBT type 4 in any of the following cases: the position of the random access opportunity in the time domain is outside the remaining time of the COT of the network equipment, and at least one part of continuous random access resources is outside the remaining time of the COT of the network equipment; wherein, the priority of the LBT type 4 is determined according to configured PRACH preamble format.
2. The method of claim 1, wherein when the first indication information indicates an LBT type of the terminal, the LBT type is LBT type 2 or LBT type 4.
3. An information sending method applied to a network device is characterized by comprising the following steps:
sending first indication information to a terminal;
the first indication information is used for the terminal to obtain an LBT type adopted by channel sensing before random access;
wherein, when the first indication information indicates at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, the first indication information is used for the terminal to perform channel sensing with LBT type 4 under any one of the following conditions: the position of the random access opportunity in the time domain is outside the remaining time of the COT of the network equipment, and at least one part of continuous random access resources is outside the remaining time of the COT of the network equipment; wherein, the priority of the LBT type 4 is determined according to configured PRACH preamble format.
4. The method of claim 3, wherein when the first indication information indicates an LBT type of the terminal,
in case that at least one complete segment of consecutive random access resources is included in the remaining time of the COT of the network device, the first indication information indicates LBT type 2.
5. The method of claim 3, wherein when the first indication information indicates an LBT type of the terminal,
in case there are no complete consecutive random access resources for the remaining time of the COT of the network device, the first indication information indicates LBT type 4.
6. A terminal, comprising:
a receiving module, configured to receive first indication information from a network device;
the interception module is used for adopting a corresponding LBT type to carry out channel interception according to the first indication information;
the random access module is used for carrying out random access when the monitored channel is empty;
wherein, when the first indication information indicates at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, the listening module is specifically configured to: channel sensing is performed with LBT type 4 in any of the following cases: the position of the random access opportunity in the time domain is outside the remaining time of the COT of the network equipment, and at least one part of continuous random access resources is outside the remaining time of the COT of the network equipment; wherein, the priority of the LBT type 4 is determined according to configured PRACH preamble format.
7. A network device, comprising:
the sending module is used for sending first indication information to the terminal;
the first indication information is used for enabling the terminal to adopt a corresponding LBT type to carry out channel interception, and random access is carried out when the intercepted channel is empty;
wherein, when the first indication information indicates at least one of a remaining time of the COT of the network device and an end time of the COT of the network device, the first indication information is used for the terminal to perform channel sensing with LBT type 4 under any one of the following conditions: the position of the random access opportunity in the time domain is outside the residual time of the COT of the network equipment, and at least one part of continuous random access resources is outside the residual time of the COT of the network equipment; wherein, the priority of the LBT type 4 is determined according to configured PRACH preamble format.
8. A communication device comprising a memory, a processor and a computer program stored on the memory and being executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the random access method according to claim 1 or 2 or the steps of the information transmission method according to any of claims 3 to 5.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the random access method according to claim 1 or 2, or the steps of the information transmission method according to any one of claims 3 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910968544.XA CN112654098B (en) | 2019-10-12 | 2019-10-12 | Random access method, information sending method, terminal and network equipment |
| PCT/CN2020/119898 WO2021068874A1 (en) | 2019-10-12 | 2020-10-09 | Random access and information transmission methods, terminal, and network device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910968544.XA CN112654098B (en) | 2019-10-12 | 2019-10-12 | Random access method, information sending method, terminal and network equipment |
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| WO2017191617A1 (en) * | 2016-05-06 | 2017-11-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Lbt parameters for uplink in unlicensed spectrum |
| WO2017199205A1 (en) * | 2016-05-20 | 2017-11-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Scheduling multiple subframes in unlicensed spectrum |
| US11659592B2 (en) * | 2018-01-19 | 2023-05-23 | Apple Inc. | Contention window adjustment mechanisms for FELAA systems |
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| WO2017126935A1 (en) * | 2016-01-20 | 2017-07-27 | 엘지전자 주식회사 | Method for transmitting uplink signal and apparatus supporting method in wireless communication system supporting non-licensed band |
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| WO2021068874A1 (en) | 2021-04-15 |
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