WO2022028341A1

WO2022028341A1 - Random access enhancement method, network device and terminal

Info

Publication number: WO2022028341A1
Application number: PCT/CN2021/109925
Authority: WO
Inventors: 刘云; 薛丽霞; 徐海博
Original assignee: 华为技术有限公司
Priority date: 2020-08-07
Filing date: 2021-07-31
Publication date: 2022-02-10

Abstract

Disclosed are a coverage enhancement method, a network device and a terminal, which relate to the field of communications. The method is applied to a random access flow of a terminal, and comprises: a terminal sending a first message to a network device, wherein the first message comprises a random access preamble; the terminal receiving a second message sent by the network device, wherein the second message is used for indicating resources, PUSCH time domains of which are repeated, of the terminal, and the resources, the PUSCH time domains of which are repeated, are indicated by means of a reserved field or a padding field in the second message; in response to the second message and at time-frequency positions of PUSCH resources which are indicated by the resources, the PUSCH time domains of which are repeated, the terminal repeatedly sending a third message to the network device according to the number of repetitions indicated by the resources, the PUSCH time domains of which are repeated, wherein the third message is a radio resource control (RRC) connection request; and the terminal receiving a fourth message sent by the network device, wherein the fourth message relates to RRC connection establishment. By means of the method, the coverage range of PUSCH uplink transmission of a terminal in a random access flow can be increased, thereby increasing the coverage range of the random access of the terminal.

Description

A kind of random access enhancement method, network device and terminal

This application claims the priority of the Chinese patent application with the application number 202010787439.9 filed with the State Intellectual Property Office of China on August 7, 2020, and the Chinese patent titled "A random access enhancement method, network device and terminal" priority to the application, the entire contents of which are incorporated herein by reference. Claims the priority of the Chinese patent application with the application number 202010843603.3 submitted to the State Intellectual Property Office of China on August 20, 2020, and the invention title is "A method, network device and terminal for random access enhancement". Priority, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of communications, and in particular, to a random access enhancement method, network device and terminal.

Background technique

In order to obtain the service of the cellular network, the terminal must access the network device through the random access procedure. In the LTE (Long Term Evolution) system and the NR (New Radio, new air interface) system, random access is divided into contention random access and non-contention random access. The contention random access process mainly includes four steps , also known as four-step random access 4-step RA (RACH, access), divided into Msg1 (random access preamble), Msg2 (random access response), Msg3 (RRC connection request), Msg4 (RRC connection establishment); the non-contention random access process only includes the first two messages Msg1 (random access preamble) and Msg2 (random access response). The random access procedure is very important to the cellular network, so how to improve the coverage of random access has always been a research topic.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a coverage enhancement method, network device, and terminal, which can improve the coverage of the physical uplink shared channel PUSCH uplink transmission of the terminal in the random access process, thereby improving the coverage of random access.

In a first aspect, an embodiment of the present application provides a coverage enhancement method, which is applied to a random access procedure of a terminal, and the method includes:

The terminal sends a first message to the network device, where the first message includes a random access preamble;

The terminal receives a second message sent by the network device, where the second message is used to indicate the terminal's PUSCH time-domain repeated resources, and the PUSCH time-domain repeated resources are indicated by a reserved field or a padding field in the second message;

In response to the second message, the terminal repeatedly sends a third message to the network device at the time-frequency position of the PUSCH resource indicated by the PUSCH time-domain repeated resource according to the number of repetitions indicated by the PUSCH time-domain repeated resource, where the third message is radio resource control RRC connection request;

The terminal receives a fourth message sent by the network device, where the fourth message is RRC connection establishment.

By adopting this method, the coverage of the PUSCH uplink transmission of the terminal in the random access procedure can be improved, thereby improving the coverage of the random access of the terminal.

In an implementation manner, before the terminal sends the first message to the network device, the method further includes:

The terminal receives a random access preamble sequence configuration sent by the network device, and the random access preamble sequence configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration.

In an implementation manner, the terminal sends the first message to the network device, including:

The terminal sends the first message to the network device using the coverage-enhanced random access preamble sequence. In this way, when the network device receives the random access preamble sequence with enhanced coverage, it will allocate the PUSCH time-domain repeated resources to the terminal, thereby avoiding the waste of resources.

In an implementation manner, the terminal sends the first message to the network device using the coverage-enhanced random access preamble sequence, including:

The terminal measures the signal sent by the network device to obtain the signal quality, and when the signal quality is lower than the third threshold, sends the first message to the network device by using the random access preamble sequence with enhanced coverage. In this way, the terminal sends the first message by using the random access preamble sequence with enhanced coverage only when the current signal quality is lower than the third threshold, which improves the utilization rate of resources.

In an implementation manner, the third threshold is configured by the network device to the terminal, or the third threshold is independently set by the terminal.

In one embodiment, the random access procedure is a four-step random access, the first message is a random access preamble, and the second message is a random access preamble response. In this way, the coverage of the terminal's four-step random access can be improved.

In one embodiment, the random access procedure is a two-step random access, the first message is MSGA, MSGA includes random access preamble and PUSCH uplink data, and the second message is MSGB. In this way, the coverage of the two-step random access of the terminal can be improved.

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources. In this way, the terminal can select the PUSCH time domain repeated resources in the two-step random access procedure to send the PUSCH uplink data in the MSGA, thereby improving the coverage of the PUSCH uplink transmission in the MSGA.

The terminal measures the signal sent by the network device to obtain the signal quality, and when the signal quality is lower than the second threshold, sends the first message to the network device by using the PUSCH time-domain repeated resources. In this way, the terminal sends the first message to the network device using the PUSCH time-domain repeated resources only when the current signal quality is lower than the second threshold, which improves resource utilization.

In an implementation manner, the second threshold is configured by the network device to the terminal, or the second threshold is independently set by the terminal.

In one embodiment, the terminal receives a random access preamble configuration sent by a network device, and the random access preamble configuration includes a normal random access preamble configuration and a coverage-enhanced random access preamble configuration, including:

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include a PUSCH time-domain repetitive resource configuration and a PUSCH time-domain non-repetitive resource configuration, where the PUSCH time domain The non-repetitive resource configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration, and the PUSCH time-domain repetitive resource configuration includes a coverage-enhanced random access preamble sequence configuration.

The terminal measures the signal sent by the network device to obtain the signal quality, and when the signal quality is lower than the fourth threshold, sends the first message to the network device by using the PUSCH time-domain repeated resources. In this way, the terminal sends the first message to the network device using the PUSCH time-domain repeated resources only when the current signal quality is lower than the fourth threshold, which improves resource utilization.

The terminal measures the signal sent by the network device to obtain the signal quality, and when the signal quality is not lower than the fourth threshold but lower than the fifth threshold, the terminal uses the enhanced coverage random access preamble sequence configuration to send the first message to the network device. Wherein, the fourth threshold is lower than the fifth threshold. In this way, the terminal uses the random access preamble sequence configuration with enhanced coverage to send the first message to the network device only when the current signal quality is not lower than the fourth threshold but lower than the fifth threshold, which improves resource utilization.

Another aspect of the embodiments of the present application provides a coverage enhancement method, which is applied to a random access procedure of a network device, and the method includes:

The network device receives a first message sent by the terminal, where the first message includes a random access preamble;

The network device responds to the first message and sends a second message to the terminal, where the second message is used to indicate the resource of the physical uplink shared channel PUSCH time domain repetition of the terminal, and the PUSCH time domain repetition resource of the PUSCH time domain is passed through the reserved field or padding field in the second message instruct;

The network device receives a third message sent by the terminal, where the third message is a radio resource control RRC connection request;

In response to the third message, the network device sends a fourth message to the terminal, where the fourth message is RRC connection establishment.

Using this method, the network device can allocate PUSCH time-domain repetitive resources to the terminal in the random access procedure, so the coverage of the PUSCH uplink transmission in the random access procedure can be improved, thereby improving the coverage of the random access.

In an implementation manner, before the network device receives the first message sent by the terminal, the method further includes:

The network device sends a random access preamble sequence configuration to the terminal, and the random access preamble sequence configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration.

In an implementation manner, the network device receives the first message sent by the terminal, including:

The network device receives the first message sent by the terminal using the coverage-enhanced random access preamble. In this way, when the network device receives the random access preamble sequence with enhanced coverage, it will allocate the PUSCH time-domain repeated resources to the terminal, thereby avoiding the waste of resources.

In an implementation manner, the network device responds to the first message and sends a second message to the terminal, where the second message is used to indicate the PUSCH time domain repeated resources of the physical uplink shared channel of the terminal, and the PUSCH time domain repeated resources pass through the second message Reserved or filled field indications in , including:

The network device measures the first message to obtain signal quality;

The network device responds to the first message and sends a second message to the terminal. When the signal quality is lower than the first threshold, the second message is used to indicate the terminal's physical uplink shared channel PUSCH time-domain repeated resources. The PUSCH time-domain repeated resources pass through the The reserved field or padding field indication in the second message. In this way, the network device allocates the PUSCH time domain repeated resources to the terminal only when the signal quality is lower than the first threshold, which improves the resource utilization rate.

In one embodiment, the random access procedure is a four-step random access, the first message is a random access preamble, and the second message is a random access preamble response. In this way, the coverage of the random access of the network device in the four-step random access procedure can be improved.

In an embodiment, the random access procedure is a two-step random access, the first message is MSGA, MSGA includes the random access preamble and PUSCH uplink data, and the second message is MSGB. In this way, the coverage of the random access of the network device in the two-step random access procedure can be improved.

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources. In this way, the terminal can select the PUSCH time domain repeated resources in the two-step random access procedure to send the PUSCH uplink data in the MSGA, thereby improving the coverage of the PUSCH uplink transmission in the MSGA.

The network device receives the first message sent by the terminal using the PUSCH time-domain repeated resource. In this way, the coverage of the PUSCH uplink transmission in the MSGA in the two-step random access procedure can be improved.

In one embodiment, the network device sends a random access preamble sequence configuration to the terminal, and the random access preamble sequence configuration includes a normal random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration, including:

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include a PUSCH time-domain repetitive resource configuration and a PUSCH time-domain non-repetitive resource configuration, where the PUSCH time domain is not The repeated resource configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration, and the PUSCH time-domain repeated resource configuration includes a coverage-enhanced random access preamble sequence configuration.

The network device receives the first message sent by the terminal using the PUSCH time-domain repeated resource configuration, or,

The network device receives the first message sent by the terminal using the coverage-enhanced random access preamble sequence configuration.

In this way, after receiving the first message sent by the terminal using the PUSCH time-domain repeated resource configuration or the coverage-enhanced random access preamble sequence configuration, the network device allocates the PUSCH time-domain repeated resources to the terminal in the second message, which improves the resource utilization.

Another aspect of the embodiments of the present application provides a coverage enhancement method, which is applied to a random access procedure of a terminal, where the random access procedure is a two-step random access procedure, including:

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources;

The terminal sends a first message to the network device by using the PUSCH time-domain repeated resources, where the first message is MSGA, and the MSGA includes a random access preamble and PUSCH uplink data.

The terminal receives a second message sent by the network device, where the second message is MSGB.

Using this method, the terminal can select the PUSCH time domain repeated resources in the two-step random access procedure to send the PUSCH uplink data in the MSGA, and improve the coverage of the PUSCH uplink transmission in the MSGA.

In an embodiment, the terminal sends the first message to the network device using the PUSCH time-domain repeated resources, including:

Another aspect of the embodiments of the present application provides a coverage enhancement method, which is applied to a random access procedure of a network device, where the random access procedure is a two-step random access procedure, including:

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources;

The network device receives a first message sent by the terminal using the PUSCH time-domain repeated resource, where the first message is MSGA, and the MSGA includes a random access preamble and PUSCH uplink data.

In response to the first message, the network device sends a second message to the terminal, where the second message is MSGB.

Another aspect of an embodiment of the present application provides an apparatus, which is applied in a terminal. The apparatus includes a processor, where the processor is coupled to a memory, reads instructions in the memory, and causes the terminal to execute the above-mentioned terminal-related instructions according to the instructions. the method described.

Another aspect of the embodiments of the present application provides an apparatus, applied in a network device, the apparatus includes a processor, the processor is configured to be coupled with a memory, and read instructions in the memory and make the network according to the instructions The device performs the method described above with respect to the network device.

Another aspect of the embodiments of the present application provides a computer program product, which, when the computer program product runs on a terminal, enables the terminal to execute the method described above with respect to the terminal.

Another aspect of the embodiments of the present application provides a computer program product, which, when the computer program product runs on a network device, causes the network device to execute the method described above with respect to the network device.

Another aspect of the embodiments of the present application provides a computer-readable storage medium, including an instruction, when the instruction is executed on a terminal, the terminal causes the terminal to execute the method described above with respect to the terminal.

Another aspect of the embodiments of the present application provides a computer-readable storage medium, including instructions, which, when the instructions are executed on a network device, cause the network device to execute the above-described method with respect to the network device.

Another aspect of an embodiment of the present application provides an apparatus for enhancing random access. The apparatus is set in a terminal, and includes: a transceiver unit, configured to send a first message, namely Msg1 (random access preamble) to a network device, and receive a network device The second message sent by the device is Msg2 (random access response); the processing unit is used to parse and obtain its own MAC RAR according to the received Msg2, and parse to obtain the number of repetitions of the corresponding PUSCH resources; the storage unit is used to The processing unit is coupled, and is also used to store programs and instructions required by the processing unit to perform functions.

Another aspect of an embodiment of the present application provides an apparatus for enhancing random access. The apparatus is set on a network device, and includes: a transceiver unit configured to receive a first message sent by a terminal device, where the first message is Msg1 (random access). The processing unit is used to measure and obtain the signal quality according to the received Msg1, and is also used to indicate the number of repetitions of the PUSCH resource of the terminal equipment in the second message generated when the measured signal quality is lower than the first threshold, The second message is Msg2 (random access response); a storage unit, used for coupling with the processing unit, and also used for storing programs and instructions required by the processing unit to perform functions.

Another aspect of an embodiment of the present application provides an apparatus for enhancing random access, the apparatus is set in a terminal, and includes: a transceiver unit configured to receive at least two RACH resource configurations sent by a network device, where the at least two RACH resource configurations include The PUSCH time domain repeated resources and the PUSCH time domain non-repetitive resources are also used to receive the second threshold sent by the network device, and also used to receive the signal sent by the network device to measure and obtain signal quality; also used to send MSGA to the network device; The processing unit can be used to select the PUSCH time-domain repetitive resource to send the first message when the signal quality is lower than the second threshold; when the signal quality is not lower than the second threshold, select the PUSCH time-domain non-repetitive resource to send the message The first message, the first message is MSGA; the storage unit is used for coupling with the processing unit, and is also used for storing programs and instructions required by the processing unit to perform functions.

Another aspect of an embodiment of the present application provides an apparatus for enhancing random access. The apparatus is set on a network device, and includes: a transceiver unit configured to send at least two RACH resource configurations to the terminal device, where the at least two RACH resource configurations include: The PUSCH time domain repetitive resources and the PUSCH time domain non-repetitive resources are also used to send the second threshold to the terminal device, and are also used to receive the first message sent by the terminal device. The first message is MSGA, and is also used when Correctly parse MSGA to obtain Preamble, but when parsing PUSCH uplink data fails, send a second message to the terminal device, the second message is MSGB, wherein the terminal device is allocated PUSCH time-domain repeated resources in MSGB; processing unit, used for Parse the uplink data in the MSGA sent by the terminal device according to the resource configuration of the RACH; the storage unit is used for coupling with the processing unit, and is also used for storing programs and instructions required by the processing unit to perform functions.

Description of drawings

Fig. 1A is the basic flow of contention random access;

Fig. 1B is the basic flow of two-step random access;

FIG. 2 is a schematic structural diagram of a mobile communication system provided by an embodiment of the present application;

3 is a schematic structural diagram of a terminal device in an embodiment of the present application;

4A-4J provide a method for coverage enhancement applied in a contention random access procedure according to an embodiment of the present application;

5A-5L provide a method for coverage enhancement applied in a two-step random access procedure according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application;

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

FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the application;

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As used herein, "plurality" refers to two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship.

For ease of understanding, the random access procedure involved in the embodiments of the present application is described in detail below.

In an LTE (Long Term Evolution, long-term evolution) system and an NR (New Radio, new air interface) system, random access is mainly divided into two types: contention random access and non-contention random access. The basic flow of competitive random access is shown in Figure 1A:

S101, the terminal sends a random access preamble (represented by Msg1), the network device obtains the Preamble ID by detecting the Preamble, and estimates the uplink transmission delay.

S102, the network device replies a random access response RAR (Random Access Response, represented by Msg2) to the terminal. Msg2 (random access response) carries the following information: the timing advance corresponding to the uplink transmission delay, the Preamble ID, the temporary user identifier allocated by the network device to the terminal, and the uplink scheduling resource authorization information.

S103, the terminal sends an RRC connection request (represented by Msg3) to the network device. The terminal adjusts the uplink timing according to the timing advance in Msg2, and sends Msg3 to the network device according to the uplink scheduling resource authorization information in Msg2. The Msg3 (RRC connection request) carries the temporary user identity allocated by the network device in Msg2 for the terminal. .

S104, the network device sends an RRC connection establishment message (represented by Msg4) to the terminal. Msg4 (RRC connection establishment message) carries contention resolution MCE (MAC Control Element, MAC Control Element), this step solves the contention and contention generated when multiple terminals try to use the same random access resource and the same Preamble ID to access. conflict.

As can be seen from the above description, the contention random access procedure contains four messages, so it is also called 4-step random access (4-step RA). Among the four messages, there are two messages (Msg1 and Msg3) in the upstream and two messages (Msg2 and Msg4) in the downstream.

Different from contention random access, the non-contention random access procedure only includes two messages, namely Msg1 (random access preamble) and Msg2 (random access preamble response). In the non-contention random access procedure, the terminal uses the dedicated random access preamble for access, and there will be no conflict caused by multiple terminals using the same random access preamble to access, so no Msg3 ( RRC connection request) and Msg4 (RRC connection establishment message) two messages.

In the four-step random access procedure, the terminal and the network device need to go through four messages to complete the random access procedure, which not only results in a large access delay, but also causes a high load of control signaling. Therefore, in the NR system, a two-step random access (2-step RA) process is introduced, as shown in Figure 1B. The two-step random access procedure consists of two steps:

S111, the terminal sends a random access preamble Preamble, and at the same time sends data on a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) resource corresponding to the resource of the random access preamble, and the two are combined to be called MSGA. The PUSCH resource is indicated to the terminal in the system message sent by the network device.

S112, after receiving the MSGA, the network device sends the MSGB to the terminal, where the MSGB is carried on a physical downlink shared channel (PhysicalDownlink Shared Channel, PDSCH) resource.

In a communication system, there are downlink transmission and uplink transmission between network devices and terminals. Due to the large size and high power consumption of network equipment, the upper limit of the power of the terminal is much lower than that of the network equipment in pursuit of power saving. Therefore, the coverage of the downlink transmission of the network equipment is generally larger than the coverage of the uplink transmission of the terminal. In order to obtain the service of the cellular network, the terminal must access the network device through the random access procedure. The first step in the random access process is that the terminal sends a random access preamble, which is a ZC (Zadoff-CHU) sequence. The characteristics of the ZC sequence itself enable the transmitted signal to cover a wide range.

In the contention random access procedure, both Msg2 and Msg4 belong to downlink transmission messages, and both are carried on PDSCH resources. As mentioned above, the coverage of the downlink transmission of the network device is wide. Msg3 (RRC connection request) is an uplink transmission message, which is sent by the terminal to the network device and carried on the PUSCH resource. The terminal is limited by power and other reasons, and the coverage of the terminal's uplink transmission is smaller than that of the network device's downlink transmission. Therefore, in the contention random access procedure, the first limited coverage is the uplink transmission of the PUSCH.

In the two-step random access procedure newly introduced by NR, MSGB is a downlink transmission message and is carried on PDSCH resources. As mentioned above, the coverage of the downlink transmission of the network device is wide. MSGA is an uplink transmission message, including random access preamble and uplink data. As mentioned above, the coverage of the random access preamble is wider, while the uplink data in MSGA is carried on the PUSCH resource. The terminal is limited by power and other reasons, and the coverage of the terminal's uplink transmission is smaller than that of the network device's downlink transmission. Scope. Therefore, in the two-step random access procedure, the first limited coverage is the uplink transmission of the PUSCH.

To sum up, in the existing four-step random access (competitive random access) and two-step random access procedures, both procedures exist because the uplink transmission of PUSCH is limited, which makes the connection between the terminal and the network device. The problem of limited coverage of random access. Based on the above problems, the embodiments of the present application propose a method, a network device, and a terminal for enhancing the coverage of random access.

Referring to FIG. 2 , it shows a schematic structural diagram of a mobile communication system 200 provided by an embodiment of the present application. The mobile communication system may be a long term evolution (Long Term Evolution, LTE) system, or a fifth-generation mobile communication technology 5G new radio (new radio, NR) system, or a machine to machine communication (Machine To Machine, M2M) The system can also be a sixth-generation communication system that evolves in the future. The mobile communication system includes: a terminal device 220 and a network device 240 .

Terminal equipment 220, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to users. A device, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal equipment may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal device may include, for example, a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile device, a smart wearable device, and the like. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants), PDA) and other devices. Also includes constrained devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.

As an example and not a limitation, the terminal device may also include a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring. The terminal device may also be a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a remote Wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, smart home in the wireless terminal, etc.

The structure of the terminal device in the embodiment of the present application is described below with reference to FIG. 3:

FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. Referring to FIG. 3 , the terminal 300 may include: a processor 310 , an external memory interface 320 , an internal memory 321 , and a universal serial bus (USB) interface 330 , charging management module 340, power management module 341, battery 342, antenna 1, antenna 2, mobile communication module 350, wireless communication module 360, audio module 370, speaker 370A, receiver 370B, microphone 370C, headphone jack 370D, sensor module 380 , button 390, motor 391, indicator 392, camera 393, display screen 394, and user identification module (subscriber identification module, SIM) card interface 395 and so on. The sensor module 380 may include a pressure sensor 380A, a gyroscope sensor 380B, an air pressure sensor 380C, a magnetic sensor 380D, an acceleration sensor 380E, a distance sensor 380F, a proximity light sensor 380G, a fingerprint sensor 380H, a temperature sensor 380J, a touch sensor 380K, and ambient light. Sensor 380L, Bone Conduction Sensor 380M, etc.

It can be understood that the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the terminal 300 . In other embodiments of the present application, the terminal 300 may include more or less components than shown, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 310 may include one or more processing units, for example, the processor 310 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (NPU) Wait. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller may be the nerve center and command center of the terminal 300 . The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 310 for storing instructions and data. In some embodiments, the memory in processor 310 is cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 310 . If the processor 310 needs to use the instruction or data again, it can be called directly from the memory. Repeated accesses are avoided, and the waiting time of the processor 310 is reduced, thereby increasing the efficiency of the system.

In some embodiments, processor 310 may include one or more interfaces. The interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transceiver (universal asynchronous transmitter) receiver/transmitter, UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and / or universal serial bus (universal serial bus, USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus that includes a serial data line (SDA) and a serial clock line (SCL). In some embodiments, processor 310 may contain multiple sets of I2C buses. The processor 310 can be respectively coupled to the touch sensor 380K, the charger, the flash, the camera 393 and the like through different I2C bus interfaces. For example, the processor 310 may couple the touch sensor 380K through the I2C interface, so that the processor 310 and the touch sensor 380K communicate with each other through the I2C bus interface, so as to realize the touch function of the terminal 300 .

The I2S interface can be used for audio communication. In some embodiments, processor 310 may contain multiple sets of I2S buses. The processor 310 may be coupled with the audio module 370 through an I2S bus to implement communication between the processor 310 and the audio module 370 . In some embodiments, the audio module 370 can transmit audio signals to the wireless communication module 360 through the I2S interface, so as to realize the function of answering calls through a Bluetooth headset.

The PCM interface can also be used for audio communications, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 370 and the wireless communication module 360 may be coupled through a PCM bus interface. In some embodiments, the audio module 370 can also transmit audio signals to the wireless communication module 360 through the PCM interface, so as to realize the function of answering calls through the Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communication. The bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is typically used to connect the processor 310 with the wireless communication module 360 . For example, the processor 310 communicates with the Bluetooth module in the wireless communication module 360 through the UART interface to implement the Bluetooth function. In some embodiments, the audio module 370 can transmit audio signals to the wireless communication module 360 through the UART interface, so as to realize the function of playing music through the Bluetooth headset.

The MIPI interface can be used to connect the processor 310 with peripheral devices such as the display screen 394 and the camera 393 . MIPI interfaces include camera serial interface (CSI), display serial interface (DSI), etc. In some embodiments, the processor 310 communicates with the camera 393 through a CSI interface, so as to realize the shooting function of the terminal 300 . The processor 310 communicates with the display screen 394 through the DSI interface to implement the display function of the terminal 300 .

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface may be used to connect the processor 310 with the camera 393, the display screen 394, the wireless communication module 360, the audio module 370, the sensor module 380, and the like. The GPIO interface can also be configured as I2C interface, I2S interface, UART interface, MIPI interface, etc.

The USB interface 330 is an interface that conforms to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like. The USB interface 330 can be used to connect a charger to charge the terminal 300, and can also be used to transmit data between the terminal 300 and peripheral devices. It can also be used to connect headphones to play audio through the headphones. This interface can also be used to connect other terminals, such as AR devices, etc.

It can be understood that the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration, and does not constitute a structural limitation of the terminal 300 . In other embodiments of the present application, the terminal 300 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.

The charging management module 340 is used to receive charging input from the charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 340 may receive charging input from the wired charger through the USB interface 330 . In some wireless charging embodiments, the charging management module 340 may receive wireless charging input through the wireless charging coil of the terminal 300 . While the charging management module 340 charges the battery 342 , it can also supply power to the terminal through the power management module 341 .

The power management module 341 is used to connect the battery 342 , the charging management module 340 and the processor 310 . The power management module 341 receives input from the battery 342 and/or the charging management module 340, and supplies power to the processor 310, the internal memory 321, the external memory, the display screen 394, the camera 393, and the wireless communication module 360. The power management module 341 can also be used to monitor battery capacity, battery cycle times, battery health status (leakage, impedance) and other parameters. In some other embodiments, the power management module 341 may also be provided in the processor 310 . In other embodiments, the power management module 341 and the charging management module 340 may also be provided in the same device.

The wireless communication function of the terminal 300 may be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, the modulation and demodulation processor, the baseband processor, and the like.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in terminal 300 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 350 may provide a wireless communication solution including 2G/3G/4G/5G, etc. applied on the terminal 300 . The mobile communication module 350 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), and the like. The mobile communication module 350 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 350 can also amplify the signal modulated by the modulation and demodulation processor, and then convert it into electromagnetic waves for radiation through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module 350 may be provided in the processor 310 . In some embodiments, at least part of the functional modules of the mobile communication module 350 may be provided in the same device as at least part of the modules of the processor 310 .

The modem processor may include a modulator and a demodulator. Wherein, the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and passed to the application processor. The application processor outputs sound signals through audio devices (not limited to the speaker 370A, the receiver 370B, etc.), or displays images or videos through the display screen 394 . In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be independent of the processor 310, and may be provided in the same device as the mobile communication module 350 or other functional modules.

The wireless communication module 360 can provide applications on the terminal 300 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 360 may be one or more devices integrating at least one communication processing module. The wireless communication module 360 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 310 . The wireless communication module 360 can also receive the signal to be sent from the processor 310 , perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2 .

In some embodiments, the antenna 1 of the terminal 300 is coupled with the mobile communication module 350, and the antenna 2 is coupled with the wireless communication module 360, so that the terminal 300 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code Division Multiple Access (WCDMA), Time Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, etc. The GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (quasi -zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

The terminal 300 implements a display function through a GPU, a display screen 394, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 394 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 310 may include one or more GPUs that execute program instructions to generate or alter display information.

Display screen 394 is used to display images, videos, and the like. Display screen 394 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light). emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) and so on. In some embodiments, the terminal 300 may include 1 or N display screens 394 , where N is a positive integer greater than 1.

The terminal 300 may implement a shooting function through an ISP, a camera 393, a video codec, a GPU, a display screen 394, an application processor, and the like.

The ISP is used to process the data fed back by the camera 393 . For example, when taking a photo, the shutter is opened, the light is transmitted to the camera photosensitive element through the lens, the light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye. ISP can also perform algorithm optimization on image noise, brightness and skin tone. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, the ISP may be located in the camera 393 .

Camera 393 is used to capture still images or video. The object is projected through the lens to generate an optical image onto the photosensitive element. The photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. DSP converts digital image signals into standard RGB, YUV and other formats of image signals. In some embodiments, the terminal 300 may include 1 or N cameras 393 , where N is a positive integer greater than 1.

A digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the terminal 300 selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point, and the like.

Video codecs are used to compress or decompress digital video. Terminal 300 may support one or more video codecs. In this way, the terminal 300 can play or record videos in multiple encoding formats, such as: moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4, and so on.

The NPU is a neural-network (NN) computing processor. By drawing on the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process the input information, and can continuously learn by itself. Applications such as intelligent cognition of the terminal 300 can be implemented through the NPU, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the terminal 300. The external memory card communicates with the processor 310 through the external memory interface 320 to realize the data storage function. For example to save files like music, video etc in external memory card.

Internal memory 321 may be used to store computer executable program code, which includes instructions. The processor 310 executes various functional applications and data processing of the terminal 300 by executing the instructions stored in the internal memory 321 . The internal memory 321 may include a storage program area and a storage data area. The storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. The storage data area may store data (such as audio data, phone book, etc.) created during the use of the terminal 300 and the like. In addition, the internal memory 321 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, universal flash storage (UFS), and the like.

The terminal 300 may implement audio functions through an audio module 370, a speaker 370A, a receiver 370B, a microphone 370C, an earphone interface 370D, and an application processor. Such as music playback, recording, etc.

The audio module 370 is used for converting digital audio information into analog audio signal output, and also for converting analog audio input into digital audio signal. Audio module 370 may also be used to encode and decode audio signals. In some embodiments, the audio module 370 may be provided in the processor 310 , or some functional modules of the audio module 370 may be provided in the processor 310 .

Speaker 370A, also referred to as "horn", is used to convert audio electrical signals into sound signals. The terminal 300 can listen to music through the speaker 370A, or listen to a hands-free call.

The receiver 370B, also referred to as "earpiece", is used to convert audio electrical signals into sound signals. When the terminal 300 answers a call or a voice message, the voice can be answered by placing the receiver 370B close to the human ear.

The microphone 370C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can make a sound by approaching the microphone 370C through a human mouth, and input the sound signal into the microphone 370C. The terminal 300 may be provided with at least one microphone 370C. In other embodiments, the terminal 300 may be provided with two microphones 370C, which may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the terminal 300 may further be provided with three, four or more microphones 370C to collect sound signals, reduce noise, identify sound sources, and implement directional recording functions.

The headphone jack 370D is used to connect wired headphones. The earphone interface 370D may be a USB interface 330, or a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor 380A is used to sense pressure signals, and can convert the pressure signals into electrical signals. In some embodiments, the pressure sensor 380A may be provided on the display screen 394 . There are many types of pressure sensors 380A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, and the like. The capacitive pressure sensor may be comprised of at least two parallel plates of conductive material. When a force is applied to pressure sensor 380A, the capacitance between the electrodes changes. The terminal 300 determines the intensity of the pressure according to the change in capacitance. When a touch operation acts on the display screen 394, the terminal 300 detects the intensity of the touch operation according to the pressure sensor 380A. The terminal 300 may also calculate the touched position according to the detection signal of the pressure sensor 380A. In some embodiments, touch operations acting on the same touch position but with different touch operation intensities may correspond to different operation instructions. For example, when a touch operation whose intensity is less than the first pressure threshold acts on the short message application icon, the instruction for viewing the short message is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, the instruction to create a new short message is executed.

The gyro sensor 380B may be used to determine the motion attitude of the terminal 300 . In some embodiments, the angular velocity of terminal 300 about three axes (ie, x, y, and z axes) may be determined by gyro sensor 380B. The gyro sensor 380B can be used for image stabilization. Exemplarily, when the shutter is pressed, the gyroscope sensor 380B detects the angle at which the terminal 300 shakes, calculates the distance to be compensated by the lens module according to the angle, and allows the lens to counteract the shake of the terminal 300 through reverse motion to achieve anti-shake. The gyro sensor 380B can also be used for navigation and somatosensory game scenarios.

Air pressure sensor 380C is used to measure air pressure. In some embodiments, the terminal 300 calculates the altitude through the air pressure value measured by the air pressure sensor 380C to assist in positioning and navigation.

Magnetic sensor 380D includes a Hall sensor. The terminal 300 can detect the opening and closing of the flip holster using the magnetic sensor 380D. In some embodiments, when the terminal 300 is a flip machine, the terminal 300 can detect the opening and closing of the flip according to the magnetic sensor 380D. Further, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, characteristics such as automatic unlocking of the flip cover are set.

The acceleration sensor 380E can detect the magnitude of the acceleration of the terminal 300 in various directions (generally three axes). When the terminal 300 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the terminal posture, and can be used in applications such as horizontal and vertical screen switching, pedometers, etc.

Distance sensor 380F for measuring distance. The terminal 300 can measure the distance through infrared or laser. In some embodiments, when shooting a scene, the terminal 300 can use the distance sensor 380F to measure the distance to achieve fast focusing.

Proximity light sensor 380G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The light emitting diodes may be infrared light emitting diodes. The terminal 300 emits infrared light to the outside through light emitting diodes. Terminal 300 uses photodiodes to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it may be determined that there is an object near the terminal 300 . When insufficient reflected light is detected, the terminal 300 may determine that there is no object near the terminal 300 . The terminal 300 can use the proximity light sensor 380G to detect that the user holds the terminal 300 close to the ear to talk, so as to automatically turn off the screen to save power. Proximity light sensor 380G can also be used in holster mode, pocket mode automatically unlocks and locks the screen.

The ambient light sensor 380L is used to sense ambient light brightness. The terminal 300 can adaptively adjust the brightness of the display screen 394 according to the perceived ambient light brightness. The ambient light sensor 380L can also be used to automatically adjust the white balance when taking pictures. The ambient light sensor 380L can also cooperate with the proximity light sensor 380G to detect whether the terminal 300 is in the pocket, so as to prevent accidental touch.

The fingerprint sensor 380H is used to collect fingerprints. The terminal 300 can use the collected fingerprint characteristics to unlock the fingerprint, access the application lock, take a picture with the fingerprint, answer the incoming call with the fingerprint, and the like.

The temperature sensor 380J is used to detect the temperature. In some embodiments, the terminal 300 uses the temperature detected by the temperature sensor 380J to execute the temperature processing strategy. For example, when the temperature reported by the temperature sensor 380J exceeds a threshold value, the terminal 300 reduces the performance of the processor located near the temperature sensor 380J, so as to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the terminal 300 heats the battery 342 to avoid abnormal shutdown of the terminal 300 caused by the low temperature. In some other embodiments, when the temperature is lower than another threshold, the terminal 300 boosts the output voltage of the battery 342 to avoid abnormal shutdown caused by low temperature.

Touch sensor 380K, also known as "touch panel". The touch sensor 380K may be disposed on the display screen 394, and the touch sensor 380K and the display screen 394 form a touch screen, also called a "touch screen". The touch sensor 380K is used to detect a touch operation on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to touch operations may be provided through display screen 394 . In other embodiments, the touch sensor 380K may also be disposed on the surface of the terminal 300, which is different from the position where the display screen 394 is located.

The bone conduction sensor 380M can acquire vibration signals. In some embodiments, the bone conduction sensor 380M can acquire the vibration signal of the vibrating bone mass of the human voice. The bone conduction sensor 380M can also contact the pulse of the human body and receive the blood pressure beating signal. In some embodiments, the bone conduction sensor 380M can also be disposed in the earphone, combined with the bone conduction earphone. The audio module 370 can analyze the voice signal based on the vibration signal of the vocal vibration bone block obtained by the bone conduction sensor 380M, so as to realize the voice function. The application processor can analyze the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 380M, and realize the function of heart rate detection.

The keys 390 include a power-on key, a volume key, and the like. Keys 390 may be mechanical keys. It can also be a touch key. The terminal 300 may receive key input and generate key signal input related to user settings and function control of the terminal 300 .

Motor 391 can generate vibrating cues. The motor 391 can be used for incoming call vibration alerts, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, playing audio, etc.) can correspond to different vibration feedback effects. The motor 391 can also correspond to different vibration feedback effects for touch operations on different areas of the display screen 394 . Different application scenarios (for example: time reminder, receiving information, alarm clock, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

The indicator 392 can be an indicator light, which can be used to indicate the charging status, the change of power, and can also be used to indicate messages, missed calls, notifications, and the like.

The SIM card interface 395 is used to connect a SIM card. The SIM card can be contacted and separated from the terminal 300 by inserting into the SIM card interface 395 or pulling out from the SIM card interface 395 . The terminal 300 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 395 can support Nano SIM card, Micro SIM card, SIM card and so on. The same SIM card interface 395 can insert multiple cards at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 395 can also be compatible with different types of SIM cards. The SIM card interface 395 is also compatible with external memory cards. The terminal 300 interacts with the network through the SIM card to realize functions such as call and data communication. In some embodiments, the terminal 300 employs an eSIM, ie an embedded SIM card. The eSIM card can be embedded in the terminal 300 and cannot be separated from the terminal 300 .

The terminal 300 may also include a magnetometer (not shown in the figure), which may also be called an electronic compass and a compass, which may be used to detect the strength and direction of the magnetic field.

The network device 240, including, for example, a base station, may refer to a device in an access network that communicates with a terminal device through one or more cells over an air interface. The network device may be used to convert received air frames to and from Internet Protocol (IP) packets and act as a router between the end device and the rest of the network, which may include an IP network. The network device can also coordinate the attribute management of the air interface. For example, a network device may include a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home Base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc., may also include An evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or may also include the fifth generation The next generation node B (gNB) in the mobile communication technology (fifth generation, 5G) new radio (NR) system, in a network structure, the network equipment may include a centralized unit (centralized unit, CU) node, or distributed unit (distributed unit, DU) node, or including CU node and DU node. The embodiments of the present application are not limited.

In a network architecture, a base station may include a baseband device and a radio frequency device, wherein the baseband device may be implemented by one node, or may be implemented by multiple nodes, and the radio frequency device may be remote from the baseband device and be implemented independently or integrated into the baseband device. , or part of the remote part is integrated in the baseband device. For example, in an LTE communication system, a base station includes a baseband device and a radio frequency device, wherein the radio frequency device may be arranged remotely relative to the baseband device, for example, a remote radio unit (RRU) is arranged remotely relative to the BBU.

The communication between the base station and the terminal follows a certain protocol layer structure. For example, the control plane protocol layer structure may include radio resource control (radio resource control, RRC) layer, packet data convergence protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media interface Access control (media access control, MAC) layer and physical layer and other protocol layer functions. The user plane protocol layer structure may include functions of protocol layers such as the PDCP layer, the RLC layer, the MAC layer, and the physical layer; in an implementation, the PDCP layer may also include a service data adaptation protocol (SDAP) layer. .

The base station can implement the functions of protocol layers such as RRC, PDCP, RLC, and MAC by one node; or can implement the functions of these protocol layers by multiple nodes; for example, in an evolution structure, the base station can include a centralized unit (centralized unit) , CU) and distributed unit (distributed unit, DU), multiple DUs can be centrally controlled by one CU. The CU and DU can be divided according to the protocol layers of the wireless network. For example, the functions of the PDCP layer and above are set in the CU, and the functions of the protocol layers below PDCP, such as the RLC layer and the MAC layer, are set in the DU.

The division of this protocol layer is only an example, and it can also be divided at other protocol layers, for example, at the RLC layer, the functions of the RLC layer and the above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Alternatively, in a certain protocol layer, for example, some functions of the RLC layer and functions of the protocol layers above the RLC layer are placed in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are placed in the DU. In addition, it can also be divided in other ways, for example, by time delay, the functions whose processing time needs to meet the delay requirements are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.

In addition, the radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited herein.

Optionally, the control plane (CP) and the user plane (UP) of the CU can also be separated and divided into different entities for implementation, namely the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity). ).

In the above network architecture, the signaling generated by the CU may be sent to the terminal through the DU, or the signaling generated by the terminal may be sent to the CU through the DU. The DU may directly encapsulate the signaling at the protocol layer and transparently transmit it to the terminal or CU without parsing the signaling. In the following embodiments, if the transmission of such signaling between the DU and the terminal is involved, at this time, the sending or receiving of the signaling by the DU includes this scenario. For example, the signaling of the RRC or PDCP layer is finally processed as the signaling of the PHY layer and sent to the terminal, or is converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer can also be considered to be sent by the DU, or sent by the DU and the radio frequency.

In the above embodiment, the CU is divided into network equipment on the radio access network (RAN) side. In addition, the CU can also be divided into network equipment on the core network (CN) side, which is not limited here.

The apparatuses in the following embodiments of the present application may be located in a terminal or a network device according to the functions implemented by the apparatuses. When the above CU-DU structure is adopted, the network device may be a CU node, or a DU node, or a base station including a CU node and a DU node.

It should be noted that the wireless communication system 200 shown in FIG. 2 is only for illustrating the technical solutions of the present application more clearly, and does not constitute a limitation on the present application. Those skilled in the art know that with the evolution of the network architecture and new services When a scenario occurs, the technical solutions provided in this application are also applicable to similar technical problems.

With reference to the mobile communication system given in FIG. 2 , FIG. 4A shows a coverage enhancement method provided by an embodiment of the present application. The method is applied in a contention random access procedure, including:

S401, the terminal sends a first message to a network device, where the first message is Msg1 (random access preamble). Specifically, the terminal obtains specific PRACH (Physical Random Access Channel, physical random access channel) resources by receiving the system message sent by the network device. Then, the terminal selects one of the PRACH resources to send Msg1 (random access preamble) to the network device.

S402, after receiving the Msg1 (random access preamble), the network device obtains the signal quality by measuring the Msg1, and sends a second message to the terminal, where the second message is Msg2 (random access response). Specifically, the network device allocates PUSCH resources to the terminal in Msg2 according to the signal quality, and when the signal quality is lower than the first threshold, the network device allocates PUSCH time-domain repetition resources to the terminal in Msg2; when the signal quality is not lower than the first threshold When the threshold is set, the network device allocates PUSCH time-domain non-repetitive resources to the terminal in Msg2. The PUSCH time-domain repeated resources include the time-frequency position of the PUSCH resource and the number of repetitions of the PUSCH resource; the PUSCH time-domain non-repetitive resources include the time-frequency position of the PUSCH resource.

Specifically, the signal quality may be RSRP (Reference Signal Receiving Power, reference signal received power), SINR (Signal to Interference plus Noise Ratio, signal to interference plus noise ratio), or RSRQ (Reference Signal Receiving Quality, reference signal reception quality), etc. . In an optional implementation manner, the signal quality is RSRP, and in this case, the first threshold may be set to -100dBm.

In an optional implementation manner, the first threshold is specified in a standard, for example, the standard provides different values of the first threshold under different coverage areas.

In an optional implementation manner, the first threshold is factory-set by the network device, or can be set independently.

In the NR system, in order to reduce the air interface signaling load, the network device packages the Msg2 data of multiple terminals into one message for sending. The structure of the Msg2 sent by the network device is shown in FIG. 4B . Msg2 is a kind of MAC PDU (Protocol Data Unit, Protocol Data Unit) data, which consists of MAC subPDU (MAC sub-PDU) and optional Padding. It can be seen from 4B that there are three types of MAC sub-PDUs: 1. MAC sub-PDUs that only carry the subheader of BI (Backoff Indicator); 2. Sub-PDUs that only carry RAPID (Random Access Preamble ID) The MAC sub-PDU of the header; 3. The MAC sub-PDU containing the sub-header carrying the RAPID and the MAC RAR (Random Access Response, random access response) at the same time. For the terminal in the four-step random access process, the MAC sub-PDU in Msg2 sent by the network device to the terminal is of the third type. After receiving the Msg2, the terminal first parses the message into its own sub-header, Then parse from the MAC RAR to the specific content sent by the network device to the terminal.

4C and 4D show two forms of sub-headers contained in the MAC sub-PDU of Msg2. Fig. 4C shows the structure of the subheader carrying BI, where BI is the waiting time for the network device to instruct the terminal to resend the Preamble in order to reduce the collision of random access of the terminal. Figure 4D shows the structure of the subheader carrying RAPID (Random Access Preamble Identity). If there is a subheader carrying BI as shown in FIG. 4C in Msg2, the subheader must be placed at the beginning of Msg2.

The meaning of each field in the above subheader structure is given below. The E field is used to indicate whether the subheader is the last subheader. The value of E is 0 to indicate that the subheader is the last subheader, and the value of E is 1. Indicates that there are other subheaders after this subheader. The T field is used to indicate the type of the subheader. The value of T is 0 to indicate that the subheader is the subheader type that carries the BI field as shown in Figure 4C, and the value of E is 1 to indicate that the subheader is as shown in Figure 4D The subheader type that carries the RAPID field. The R field is a reserved bit. The BI (Backoff Indicator, backoff indication) field is a collision delay indication field, occupying 4 bits. The RAPID field represents the Preamble ID in the random access process, occupying 6 bits, and the terminal can identify its own subheader through this field.

FIG. 4E shows the specific structure of the MAC RAR in Msg2 (random access response) as shown in FIG. 4B. MAC RAR is mainly composed of R field, Timing Advance Command field, UL Grant field and Temporary C-RNTI field. The R field is a reserved bit. The Timing Advance Command field is used by the network device to instruct the terminal to perform uplink time alignment adjustment. The specific network device measures the timing advance by receiving the Msg1 sent by the terminal, and then indicates it to the terminal through the Timing Advance Command field. The UL Grant field is the PUSCH uplink resource allocated by the network device to the terminal for sending Msg3. The specific UL Grant field indicates to the terminal information such as the time-frequency location and modulation mode of the PUSCH resource. The Temporary C-RNTI field is a temporary C-RNTI (Cell Radio Network Temporary Identifier) identifier assigned by the network device to the terminal. The temporary C-RNTI identifier is converted into a formal C-RNTI identifier after the terminal successfully completes the random access procedure. .

Padding in FIG. 4B is a padding field of Msg2. This field is mainly used for filling Msg2 data. The number of bytes occupied by the Padding field is determined according to the resource size allocated by the network device for Msg2 transmission. In one case, the PDSCH resource allocated by the network device for Msg2 just accommodates the MAC sub-PDU in Msg2, and the Padding field does not need to be used for data padding in Msg2.

When the signal quality obtained by the network device by measuring Msg1 sent by the terminal is not lower than the first threshold, when sending Msg2 to the terminal, the network device fills in the MAC sub-PDU of the terminal according to the existing structure.

When the signal quality obtained by the network device by measuring the Msg1 sent by the terminal is lower than the first threshold, the network device needs to allocate PUSCH time-domain repetition resources to the terminal in Msg2, so that the terminal can repeatedly send Msg3 and improve the PUSCH uplink of the terminal. Transmission coverage. There are several ways in which the network device indicates the PUSCH time-domain repeated resources to the terminal:

Mode 1: As shown in Figure 4E, the R field is a reserved bit and is located in the first bit of the MAC RAR. In an optional implementation manner, the network device sets the R field to 1 to indicate that the terminal is allocated a PUSCH time domain repeated resource, and the specific PUSCH frequency domain position and the time domain position of the first transmission are shown in Figure 4E The UL Grant field in Padding is determined, and the number of repetitions of the PUSCH time-domain repeated resources is indicated by adding the first field in Padding. As mentioned above, the Padding field is used to fill in the Msg2 data. Therefore, a traditional terminal, that is, a terminal that does not use the method of the embodiment of the present application, will not parse the data content of Padding. For a MAC RAR whose R field is 1, there will be a corresponding first field in the Padding field to carry the number of repetitions of the PUSCH time-domain repetition resources allocated by the MAC RAR. The first field in the Padding field is placed in the order of the MAC RAR. The optional first field occupies 2 bits, in which 00 represents the number of repetitions is 2, 01 represents the number of repetitions is 4, 10 represents the number of repetitions is 6, and 11 represents the number of repetitions is 8. The network device sets the R field in the MAC RAR to 0 to indicate that the terminal is allocated a PUSCH time-domain non-repetitive resource, that is, the terminal only needs to send Msg3 to the network device once on the corresponding resource.

For example, the Msg2 sent by the network device includes the MAC RARs of 3 terminals, wherein the R field of the MAC RAR of the first terminal is 1, the R field of the MAC RAR of the second terminal is 0, and the R field of the MAC RAR of the third terminal is 1. The first field in Padding representing the number of repetitions of the PUSCH time-domain repetition resource occupies 2 bits, then the structure of the first byte of the Padding field in Msg2 sent by the network device to the terminal is shown in Figure 4F. FIG. 4F shows the filling of the first field in the Padding field. It can be seen from FIG. 4F that the number of repetitions of the PUSCH resources of the first terminal is 4, and the number of repetitions of the PUSCH resources of the third terminal is 8.

It should be noted that, when allocating downlink PDSCH resources to Msg2, the network device should consider the size occupied by the first field indicating the number of repetitions of the PUSCH resources to allocate appropriate PDSCH resources.

In an optional implementation manner, the network device sets the R field to 1 to represent that the number of repetitions of the PUSCH time-domain repetition resources allocated to the terminal is N times, where N can be a value including 2 or 4. In this embodiment, the network device does not need to add a new field to the Padding field to indicate the number of repetitions of the configured PUSCH time-domain repetition resources. The network device sets the R field to 0 to represent that the PUSCH resources allocated to the terminal are non-repetitive resources in the time domain.

Mode 2: In the Padding field, allocate a bit of repetition times indication bit for each MAC RAR. When the repetition times indication bit is 1, it means that the terminal is allocated PUSCH time domain repetition resources. When the repetition times indication bit is 0, it means: The terminal allocation is a PUSCH time domain non-repetitive resource. The placement order of the repetition times indication bits is the same as that of the MAC RAR. After all the repetition times indication bits, for the repetition times indication bits whose value is 1, there is a corresponding second field for indicating the repetition times of the PUSCH resource, wherein the second field is in the order of the repetition times indication bits placed. The optional second field occupies 2 bits, where 00 represents the number of repetitions is 2, 01 represents the number of repetitions is 4, 10 represents the number of repetitions is 6, and 11 represents the number of repetitions is 8.

For example, the Msg2 sent by the network device contains the MAC RARs of 3 terminals, wherein the repetition times indication bit of the first terminal is 1, the repetition times indication bit of the second terminal is 0, and the repetition times indication bit of the third terminal is 1 . There is a second field indicating the number of repetitions after all the repetition times indicating bits. Assuming that the second field occupies 2 bits, the structure of the first byte of the Padding field in Msg2 sent by the network device to the terminal is as follows: shown in Figure 4G. It can be seen from FIG. 4G that the number of repetitions of the PUSCH resources of the first terminal is 4, and the number of repetitions of the PUSCH resources of the third terminal is 8.

It should be noted that, when allocating downlink PDSCH resources for Msg2 (random access response), the network device should take into account the size occupied by the repetition times indicator bit and the second field indicating the repetition times of the PUSCH resource to allocate appropriate PDSCH resources.

Mode 3: According to the number of MAC RARs, a third field corresponding to the MAC RARs is reserved in the Padding field to indicate the number of repetitions of the PUSCH resources allocated to the terminal, where the third field is in the order of the MAC RARs placed. In an optional implementation manner, the third field occupies 2 bits, where 00 represents the number of repetitions is 1, 01 represents the number of repetitions is 2, 10 represents the number of repetitions is 4, and 11 represents the number of repetitions is 6.

For example, the Msg2 (random access response) sent by the network device includes the MAC RARs of 3 terminals, wherein the number of repetitions of the PUSCH time-domain repetition resources allocated to the first terminal is 4, and the PUSCH time-domain repetition resources allocated to the second terminal are 4 times. The number of repetitions is 1, and the number of repetitions of the PUSCH time domain repetition resource allocated to the third terminal is 2, then the structure of the first byte of the Padding field in the Msg2 (random access response) sent by the network device to the terminal is as follows shown in Figure 4H.

It should be noted that, when allocating downlink PDSCH resources to Msg2, the network device needs to consider the size occupied by the third field used to indicate the number of repetitions of the PUSCH resources to allocate appropriate PDSCH resources.

It can be seen from the above three methods that the terminal supporting the method of the embodiment of the present application can correctly parse the content of the MAC sub-PDU, and can also correctly parse the R reserved field in the MAC RAR and the content indicated in the Padding field, thereby Repeated transmission of the PUSCH can be performed according to the instruction of the network device, thereby improving the coverage of the PUSCH uplink transmission of the terminal.

The traditional terminal does not need to parse the R reserved field and the Padding field in the MAC RAR, so in this embodiment, the traditional terminal can correctly Msg2.

The structure of the Msg2 in the LTE system is basically similar to the structure of the Msg2 in the NR system, and the specific structure is shown in FIG. 4I .

Msg2 in the LTE system is also a kind of MAC PDU data, which is mainly composed of MAC Header, MAC Payload and optional Padding field. The MAC Header includes one or more subheaders, and the structure of the subheader is the same as that of the subheader in the NR system, as shown in FIG. 4C and FIG. 4D , and details are not repeated here. The MAC Payload contains multiple MAC RARs, and the structure of the MAC RARs is the same as that of the MAC RARs in the NR system, and will not be repeated here. There is a one-to-one correspondence between the subheader carrying the RAPID and the MAC RAR in the MAC Payload. The only difference is that in the LTE system, the R reserved field in the MAC RAR has been allocated for use, so only the second and third methods given above can be used to indicate the number of repetitions of the terminal PUSCH time-domain repetition resources. specific,

The basic constituent units of Msg2 in the LTE system and the Msg2 in the NR system are the same. The difference is that the assembly order of the constituent units is different. Therefore, the principle of indicating the number of repetitions of PUSCH resources in the LTE system is consistent with the description in the NR system. This will not be repeated here.

S403, the terminal receives the Msg2 sent by the network device, parses to obtain the PUSCH resource corresponding to the terminal, and sends a third message, namely Msg3 (RRC connection request), to the network device.

When the PUSCH resource is a PUSCH time-domain repeated resource, the terminal parses Msg2 to obtain the time-frequency position of the PUSCH resource and the number of repetitions of the PUSCH resource, and sends a third message to the network device according to the number of repetitions indicated by the network device. For example, the network device indicates that the number of repetitions of the PUSCH resource of the terminal is 4, then the terminal continuously sends Msg3 4 times to the network device in the corresponding uplink time slot. When the PUSCH resource is a PUSCH time domain non-repetitive resource, the terminal parses Msg2 to obtain the time-frequency position of the PUSCH resource, and sends a third message to the network device.

S404, the network device receives the Msg3 sent by the terminal, and sends a fourth message to the terminal, where the fourth message is Msg4 (RRC connection establishment). The network device receives multiple Msg3s sent by the terminal, and the network device combines and jointly decodes the multiple Msg3s, which increases the probability of successfully demodulating the Msg3s.

It can be seen from the above description that the coverage enhancement method provided by the above embodiment can improve the coverage of the PUSCH uplink transmission of the terminal supporting the method in the embodiment of the present application. In addition, the method is compatible with traditional terminals, that is, traditional terminals can also perform random access normally in this embodiment.

It should be noted that, because the network device cannot distinguish between traditional terminals and terminals that support the methods of the embodiments of the present application, the network device will also allocate PUSCH time-domain repeated resources to traditional terminals, but traditional terminals cannot use these PUSCH time-domain repeated resources. resources, resulting in a waste of resources.

In an optional implementation manner, the terminal uses different random access preamble sequence configurations to perform random access, so that the network device can distinguish the terminal according to the random access preamble sequence, so as to allocate appropriate PUSCH resources to the terminal. The process is shown in Figure 4J:

S411, the network device sends a random access preamble sequence configuration to the terminal. Specifically, the random access preamble sequence configuration is divided into a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration. The network device may add a new field in the system message to configure the coverage-enhanced random access preamble sequence, for example, configure 56 normal random access preamble sequences and 8 coverage-enhanced random access preamble sequences for the terminal.

When receiving the random access preamble sequence configuration sent by the network device, the terminal supporting the method of the embodiment of the present application can read the common random access preamble sequence configuration and the coverage-enhanced random access preamble sequence configuration at the same time. When the traditional terminal receives the random access preamble sequence configuration sent by the network device, it can only read the common random access preamble sequence configuration.

S412, the terminal sends a first message, that is, a random access preamble, to the network device.

For a terminal that supports the method of this embodiment of the present application, in an optional implementation manner, the terminal measures the signal delivered by the network device to obtain the signal quality, for example, the terminal measures the SSB (Synchronization Signal and PBCH block, synchronization signal and PBCH block) ) in the PBCH (Physical Broadcast Channel, physical broadcast channel) DMRS (Demodulation Reference Signal, demodulation reference signal) to obtain signal quality. The terminal selects a random access preamble sequence according to the signal quality to perform random access. For example, when the signal quality is lower than the third threshold, the terminal selects the enhanced random access preamble sequence configuration to send the first message to the network device; when the signal quality is not lower than the third threshold, the terminal selects the normal random access preamble sequence The configuration sends the first message to the network device.

For a terminal that supports the method of this embodiment of the present application, in an optional implementation manner, when the terminal reads the common random access preamble sequence configuration and the coverage-enhanced random access preamble sequence configuration sent by the network device, it directly A first message is sent to the network device using the coverage-enhanced random access preamble configuration.

For the traditional terminal, only the common random access preamble sequence configuration sent by the network device can be read, so the traditional terminal uses the common random access preamble sequence configuration to send the first message to the network device.

S413 , the network device receives the first message sent by the terminal, and sends the second message, that is, Msg2 (random access response), to the terminal.

Specifically, the network device receives the first message sent by the terminal, parses and obtains the Preamble ID of the random access preamble, and identifies the random access preamble as an ordinary random access preamble in combination with the random access preamble configuration sent to the terminal in step S411 The preamble sequence is also an enhanced random access preamble sequence. For example, if the Preamble ID of the random access preamble is a Preamble ID in the configuration of the random access preamble sequence with enhanced coverage, then the random access preamble is the random access preamble sequence with enhanced coverage.

In an optional implementation manner, when the first message is a random access preamble sequence with enhanced coverage, the network device measures the first message to obtain signal quality, and when the signal quality is lower than the first threshold, the network device in Msg2 Allocate PUSCH time-domain repetitive resources for the terminal; when the signal quality is not lower than the first threshold, the network device allocates PUSCH time-domain non-repetitive resources to the terminal in Msg2, wherein the indication mode of the PUSCH time-domain repetitive resources and step S402 It is consistent with the description in , and will not be repeated here.

In an optional implementation manner, when the first message is a random access preamble sequence with enhanced coverage, the network device assigns the terminal with PUSCH time-domain repetition resources by default.

In an optional implementation manner, when the first message is a common random access preamble sequence, the network device allocates PUSCH time-domain non-repetitive resources to the terminal.

The processing after the terminal receives the Msg2 sent by the network device is consistent with the description in FIG. 4A , and details are not repeated here.

In this way, the network device will only allocate PUSCH time-domain duplicate resources to the terminals that need coverage enhancement, which avoids the waste of resources caused by allocating PUSCH time-domain duplicate resources to traditional terminals. resources with repeated domains, thereby improving the coverage of the terminal's PUSCH uplink transmission.

With reference to the mobile communication system given in FIG. 2 , FIG. 5A shows a coverage enhancement method provided by an embodiment of the present application. The method is applied in a two-step random access process, including:

S501, the network device sends the configuration of at least two RACH resources to the terminal, one is the PUSCH time domain repetitive resource, and the other is the PUSCH time domain non-repetitive resource, wherein the PUSCH resource is allocated to the terminal to send the PUSCH data in the MSGA of. At the same time, the network device configures a second threshold for the terminal. When the quality of the signal received by the terminal from the network device is lower than the second threshold, the terminal uses the PUSCH time-domain repeated resources to send the PUSCH data in the MSGA; when the terminal receives the signal from the network device When the quality is not lower than the second threshold, the terminal sends the PUSCH data in the MSGA by using the PUSCH time domain non-repetitive resources.

In an optional implementation manner, the network device configures the at least two RACH resources to the terminal in the system message, where the RACH resources include PRACH resources and PUSCH resources. Specifically, information such as PRACH resources and the time-frequency position, modulation mode, and repetition times of the corresponding PUSCH resources may be indicated in the SIB (System Information Block) message. FIG. 5B and FIG. 5C are schematic diagrams of configuration of two RACH resources. FIG. 5B shows the PUSCH time domain repeated resources. It can be seen that there are multiple repeated PUSCH resources after one PRACH resource. FIG. 5C shows the PUSCH time domain non-repetitive resources, and it can be seen that only one PUSCH resource is included after one PRACH resource. The PRACH resource refers to the resource used by the terminal to send the random access preamble Preamble.

In an optional implementation manner, the network device does not configure the second threshold for the terminal, and the terminal autonomously selects the size of the second threshold, or specifies the size of the second threshold in a standard.

In an optional implementation manner, the second threshold is set to different values according to different coverage requirements.

S502, the terminal receives the signal sent by the network device, and measures the signal to obtain the signal quality. In an optional implementation manner, the terminal may measure the DMRS (Demodulation Reference) of the PBCH (Physical Broadcast Channel) in the SSB (Synchronization Signal and PBCH block) before random access. Signal, demodulation reference signal) to obtain signal quality.

In an optional implementation manner, before step S502 and step S501, the terminal has measured and obtained signal quality before receiving at least two kinds of RACH resources sent by the network device. This embodiment of the present application does not limit this.

S503, the terminal selects a corresponding RACH resource according to the measured signal quality to send a first message, where the first message is MSGA. Specifically, when the signal quality is lower than the second threshold, the terminal uses PUSCH time-domain repeated resources to send MSGA; when the signal quality is not lower than the second threshold, the terminal uses PUSCH time-domain non-repetitive resources to send MSGA. The MSGA includes random access preamble and PUSCH uplink data.

S504, the network device receives the MSGA sent by the terminal, and sends a second message to the terminal, where the second message is MSGB. Optionally, the network device receives multiple PUSCH uplink data sent by the terminal, and the network device combines and jointly decodes the multiple PUSCH uplink data, which increases the probability of successfully demodulating the PUSCH uplink data.

Among them, MSGB is a kind of MAC PDU data, which consists of subPDU (MAC sub-PDU) and optional Padding. A MAC sub-PDU consists of a subheader (subheader) and a MAC RAR. There are 5 types of MAC sub-PDUs: 1. MAC sub-PDUs with only sub-headers carrying BI; 2. MAC sub-PDUs containing both sub-header fallback RAR (fallback RAR) and its sub-headers; 3. Successfully including sub-headers at the same time RAR (successRAR) and its sub-header MAC sub-PDU; 4. Also include sub-header MAC SDU (Service Data Unit, service data unit) and its sub-header MAC sub-PDU; 5. Also include sub-header Padding and its sub-headers the MAC sub-PDU.

Figures 5D-5F show three forms of subheaders included in the MAC sub-PDU in the MSGB. FIG. 5D shows the structure of the subheader carrying BI, FIG. 5E shows the structure of the subheader of fallback RAR (fallback RAR), and FIG. 5F shows the structure of the subheader of successful RAR (success RAR). If there is a subheader carrying BI as shown in FIG. 5D , the subheader must be placed at the beginning of the MSGB.

The meaning of each field in the above subheaders is given below. The E field is used to indicate whether the subheader is the last subheader except the subheader of the MAC SDU. The value of E is 0 to indicate that the subheader is a subheader other than the MAC SDU. The last sub-header outside the sub-header, the value of E is 1 to indicate that there are other sub-headers besides the sub-header of the MAC SDU after the sub-header. The T1 field indicates whether the subheader contains the RAPID field or the T2 field. The value of T1 is 0 to indicate that the subheader includes the T2 field, and the value of T1 to 1 indicates that the subheader includes the RAPID field. The T2 field indicates whether the subheader contains the BI field or the S field. The value of T2 is 0 to indicate that the subheader contains the BI field, and the value of T2 to 1 indicates that the subheader contains the S field. The S field indicates whether there is a MAC sub-PDU that contains both MAC SDU (Service Data Unit) and its sub-header after the sub-header. The value of S is 0, which means that the sub-header does not contain both MAC SDU (Service Data Unit) after the sub-header. , Service Data Unit) and the MAC sub-PDU of its sub-header, and the value of S is 1 to represent that there is a MAC sub-PDU containing both a MAC SDU (Service Data Unit, Service Data Unit) and its sub-header behind the sub-header. The R field is reserved. The BI field is a collision delay indication bit, occupying 4 bits. The RAPID field represents the Preamble ID in the random access process, occupying 6 bits, and the terminal can identify its own subheader through this field.

The structure of MSGB is divided into two types, one is the structure of MSGB that carries the MAC sub-PDU containing both MAC SDU (Service Data Unit) and its subheaders, as shown in Figure 5G; The structure of the MSGB of the MAC sub-PDU including the MAC SDU (Service Data Unit) and its sub-header is shown in Figure 5H. In the structure of MSGB as shown in FIG. 5G , the data padding is performed using the MAC sub-PDU containing both Padding and its sub-headers. In the structure of MSGB as shown in Figure 5H, padding is directly used for data padding. That is to say, there is a Padding field in the structure of both MSGBs.

When the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the network device sends a fallback RAR (fallback RAR) to the terminal in the MSGB to instruct the terminal to fall back to the four-step random access process to continue random access. access. The structure of the specific fallback RAR (fallback RAR) is shown in Figure 5I. The structure of the fallback RAR is basically the same as the structure of the MAC RAR given in Figure 4E. The only difference is that the size occupied by the UL Grant field has changed. Here No longer.

In an optional implementation manner, as shown in FIG. 5A , the network device correctly parses MSGA to obtain Preambe and PUSCH uplink data, and sends MSGB to the terminal. At this time, what is carried in the MSGB is the successful RAR (success RAR) of the terminal. The terminal completes random access after receiving the MSGB.

In an optional implementation manner, as shown in FIG. 5J , the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, and sends the MSGB to the terminal. At this time, the fallback RAR (fallback RAR) of the terminal is carried in the MSGB, which is used to instruct the terminal to fall back to the four-step random access procedure to continue random access. In the MSGB, the terminal is allocated a PUSCH time-domain repeated resource. As mentioned above, the fallback RAR in MSGB is similar to the MAC RAR in Msg2 in the four-step random access process. The first field is the R reserved field, and there is also a Padding field in MSGB, so The resource indication of the PUSCH time domain repetition can be performed using the manner described in step S402 in FIG. 4A , and details are not repeated here.

The terminal receives the MSGB, parses and obtains the fallback RAR (fallback RAR) corresponding to the terminal, obtains the PUSCH time-frequency position, and obtains the PUSCH time domain repetition through the R reserved field in the fallback RAR (fallback RAR) or the newly added field in Padding. number of repetitions. The terminal repeatedly sends the PUSCH data, that is, Msg3 (RRC connection request), on the corresponding PUSCH resource according to the instruction of the network device.

The network device receives Msg3 (RRC connection request) sent by the terminal, sends Msg4 (RRC connection establishment) to the terminal, and the terminal completes the random access process after receiving Msg4 (RRC connection establishment).

It should be noted that, in step S501, the traditional terminal can only read the RACH resource configuration of the PUSCH time domain non-repetitive resources, so it only uses the RACH resource configuration of the PUSCH time domain non-repetitive resources to send the first RACH resource configuration to the network device. a message.

Using the coverage enhancement method provided by the above-mentioned embodiments of the present application, the terminal obtains the signal quality through measurement, and when the signal quality is lower than the second threshold, the PUSCH time domain repetition resource is used to send the MSGA, so the PUSCH uplink transmission in the MSGA can be improved. coverage. And when the network device fails to parse the PUSCH data in MSGA, it allocates PUSCH time domain repetition resources to the terminal through MSGB to instruct the terminal to repeatedly send PUSCH data, that is, Msg3 (RRC connection request), which also improves the coverage of Msg3 PUSCH uplink transmission. Scope.

In an optional implementation manner, the network device configures only one type of RACH resource for the terminal, that is, the PUSCH time domain non-repetitive resource. The terminal uses the RACH resource to send the first message, which is MSGA. When the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, it sends a second message to the terminal. The second message is MSGB and is in MSGB. In the above-described manner, the terminal is allocated the PUSCH time-domain repeated resources. In this way, after the terminal receives the MSGB, it continues to perform random access according to the fallback RAR (fallback RAR) carried in the terminal to four-step random access, and sends PUSCH data according to the number of repetitions indicated by the network device, That is, Msg3 (RRC connection request), thereby improving the coverage of PUSCH uplink transmission of Msg3.

In the above embodiment, because the network device cannot distinguish between the traditional terminal and the terminal supporting the method of the embodiment of the present application, after the traditional terminal sends the MSGA to the network device, the network device correctly parses the MSGA to obtain the Preamble, but parses the PUSCH uplink When the data fails, the network device also allocates resources with repeated PUSCH time domain in the MSGB to the traditional terminal, but the traditional terminal cannot use these resources with repeated time domain of PUSCH, thus causing a waste of resources.

In an optional implementation manner, the terminal uses RACH resources configured with different random access preambles to perform two-step random access, so that the network device can distinguish the terminal according to the random access preamble, so as to assign the appropriate terminal to the terminal. PUSCH resources, the specific process is shown in Figure 5K:

S531, the network device sends the RACH resource configuration to the terminal. The RACH resource is a non-repetitive resource in the PUSCH time domain. The RACH resource configuration includes a random access preamble sequence configuration. The random access preamble sequence configuration is divided into a common random access preamble sequence configuration and a coverage enhanced random access preamble sequence configuration. . The network device can add a new field in the system message to configure the RACH resource configuration including the coverage-enhanced random access preamble sequence configuration, for example, configure the RACH resource configuration including 56 ordinary random access RACH resource configuration covering the enhanced random access preamble sequence.

S532, the terminal sends a first message to the network device, where the first message is MSGA, where MSGA includes random access preamble and PUSCH data.

For a terminal that supports the method of this embodiment of the present application, in an optional implementation manner, the terminal measures the signal delivered by the network device to obtain the signal quality, for example, the terminal measures the SSB (Synchronization Signal and PBCH block, synchronization signal and PBCH block) ) in the PBCH (Physical Broadcast Channel, physical broadcast channel) DMRS (Demodulation Reference Signal, demodulation reference signal) to obtain signal quality. The terminal selects RACH resources including different random access preamble sequence configurations according to the signal quality to send the first message. For example, when the signal quality is lower than the third threshold, the terminal selects the RACH resource configuration that includes the coverage-enhanced random access preamble sequence configuration to send the first message to the network device; when the signal quality is not lower than the third threshold, the terminal selects the RACH resource configuration including the normal The RACH resource configuration of the random access preamble sequence configuration sends the first message to the network device.

For a terminal that supports the method of this embodiment of the present application, in an optional implementation manner, the terminal reads the RACH resource configuration including the normal random access preamble sequence configuration and the random access including the coverage enhancement sent by the network device. When the RACH resource configuration of the preamble sequence configuration is used, the first message is directly sent to the network device by using the RACH resource configuration including the coverage-enhanced random access preamble sequence configuration.

For a traditional terminal, only the RACH resource configuration containing the common random access preamble sequence configuration sent by the network device can be read. Therefore, the traditional terminal uses the RACH resource configuration containing the common random access preamble sequence configuration to send the first message to the network device. .

S533, the network device receives the MSGA sent by the terminal, and sends a second message to the terminal, where the second message is MSGB, and the MSGB carries the fallback RAR (fallback RAR) of the terminal.

Specifically, the network device receives the MSGA sent by the terminal, parses and obtains the Preamble ID of the random access preamble, and identifies the random access preamble in combination with the RACH resource configuration including the random access preamble sequence configuration sent to the terminal in step S531 Whether it is an ordinary random access preamble sequence or a coverage-enhanced random access preamble sequence. For example, if the Preamble ID of the random access preamble is a Preamble ID in the configuration of the random access preamble sequence with enhanced coverage, then the random access preamble is the random access preamble sequence with enhanced coverage.

When the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the network device sends a second message, namely MSGB, to the terminal. The network device sends a fallback RAR (fallback RAR) to the terminal in the MSGB to instruct the terminal to fall back to the four-step random access procedure to continue random access. Optionally, the random access preamble contained in the MSGA is a coverage-enhanced random access preamble sequence, and the network device measures the random access preamble contained in the MSGA to obtain signal quality. In MSGB, the terminal is allocated PUSCH time-domain repeated resources; when the signal quality is not lower than the first threshold, the network device allocates PUSCH time-domain non-repetitive resources to the terminal in MSGB. Optionally, the random access preamble included in the MSGA is a coverage-enhanced random access preamble sequence, and the network device allocates PUSCH repeated resources to the terminal by default in the MSGB. Optionally, the random access preamble included in the MSGA is a common random access preamble sequence, and the network device allocates PUSCH time-domain non-repetitive resources to the terminal.

It should be noted that when the network device correctly parses MSGA to obtain Preambe and PUSCH uplink data, it sends MSGB to the terminal. At this time, what is carried in the MSGB is the successful RAR (success RAR) of the terminal. The terminal completes random access after receiving the MSGB. This flow is not shown in Figure 5K.

Using the method provided by the above embodiment, when the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the network device will only allocate the PUSCH time domain duplicated resources to the terminals that need to perform coverage enhancement, avoiding the need for traditional terminals. The resource waste caused by allocating the PUSCH time-domain duplicated resources also allocates the PUSCH time-domain duplicated resources to the terminal that needs coverage enhancement, thereby improving the coverage of the PUSCH uplink transmission of the terminal.

Similarly, in a coverage enhancement method provided in FIG. 5J, the network device cannot distinguish between the traditional terminal and the terminal supporting the method of this embodiment, so after the traditional terminal sends MSGA to the network device, the network device correctly parses the MSGA to obtain the Preamble , but when parsing PUSCH uplink data fails, the network device will also allocate resources with repeated PUSCH time domain to traditional terminals in MSGB, but traditional terminals cannot use these resources with repeated PUSCH time domain, thus causing a waste of resources. To address this problem, Figure 5L provides a coverage enhancement method that includes:

S541 , the network device sends the configuration of at least two RACH resources to the terminal, one is the PUSCH time-domain repetitive resource, and the other is the PUSCH time-domain non-repetitive resource. The RACH resource configuration includes the random access preamble configuration. Among them, there are two configurations for the PUSCH time-domain non-repetitive resources: one is the PUSCH time-domain non-repetitive resource including the common random access preamble sequence configuration; the other is the random access preamble sequence configuration including coverage enhancement PUSCH time domain non-repetitive resources. For the PUSCH time-domain repeated resources, only the coverage-enhanced random access preamble configuration is included. This can be achieved by adding a field to the system message. For example, there are a total of 64 random access preamble sequences, of which 0-47 are allocated to the PUSCH time-domain non-repetitive resources containing the common random access preamble sequence configuration, and 48-55 are allocated to the random access preamble sequence configuration containing coverage enhancement. PUSCH time-domain non-repetitive resources, 56-63 are allocated to PUSCH time-domain repetitive resources. In this way, when the network device receives the MSGA sent by the terminal, parses and obtains the Preamble ID of the random access preamble, and combines the RACH resource configuration sent to the terminal in step S501 to identify the random access preamble as a common random access preamble The sequence is also an enhanced random access preamble sequence.

S542, the terminal receives the signal sent by the network device, and measures the signal to obtain the signal quality. In an optional embodiment, the terminal may measure the DMRS (Demodulation Reference) of the PBCH (Physical Broadcast Channel) in the SSB (Synchronization Signal and PBCH block) before random access. Signal, demodulation reference signal) to obtain signal quality.

In an optional implementation manner, before step S542 and step S541, the terminal has measured and obtained signal quality before receiving at least two kinds of RACH resources sent by the network device. This embodiment of the present application does not limit this.

S543 , the terminal selects the corresponding RACH resource according to the measured signal quality to send the first message, namely MSGA, where MSGA includes random access preamble and PUSCH data. Specifically, when the signal quality is lower than the fourth threshold, the terminal uses the PUSCH time-domain repeated resources to send MSGA; when the signal quality is not lower than the fourth threshold, but lower than the fifth threshold, the terminal uses random access including coverage enhancement. Access the PUSCH time-domain non-repetitive resources configured by the preamble to send MSGA; when the signal quality is not lower than the fifth threshold, the terminal uses the PUSCH time-domain non-repetitive resources configured by the common random access preamble to send MSGA . The fourth threshold is lower than the fifth threshold. In this way, the coverage enhancement is performed in layers according to the signal quality, and the coverage of random access is improved.

S544, the network device receives the MSGA sent by the terminal, and sends a second message, that is, MSGB, to the terminal. When the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, it sends the MSGB to the terminal, and the MSGB carries the fallback RAR (fallback RAR) of the terminal.

In an optional implementation manner, the Preamble obtained by the network device parsing the MSGA belongs to the Preamble in the PUSCH time domain non-repetitive resource configuration, or belongs to the Preamble in the random access preamble sequence configuration including coverage enhancement. Optionally, the network device obtains the signal quality according to the measured Preamble, and when the signal quality is lower than the first threshold, the network device allocates PUSCH time-domain repetition resources for the terminal in the MSGB; when the signal quality is not lower than the first threshold, The network device allocates PUSCH time-domain non-repetitive resources to the terminal in the MSGB. Optionally, the network device allocates the PUSCH time-domain repeated resources to the terminal by default in the MSGB.

In an optional implementation manner, the Preamble obtained by the network device parsing the MSGA belongs to the Preamble in the configuration containing the common random access preamble sequence. The network device allocates PUSCH time-domain non-repetitive resources to the terminal in the MSGB.

The terminal receives the MSGB, parses and obtains the fallback RAR (fallback RAR) corresponding to the terminal, obtains the PUSCH time-frequency position, and obtains the PUSCH time domain repetition through the R reserved field in the fallback RAR (fallback RAR) or the newly added field in Padding. number of repetitions. The terminal repeatedly sends PUSCH data, namely Msg3 (RRC connection request), on the corresponding PUSCH resource according to the instruction of the network device.

It should be noted that when the network device correctly parses MSGA to obtain Preambe and PUSCH uplink data, it sends MSGB to the terminal. At this time, what is carried in the MSGB is the successful RAR (success RAR) of the terminal. The terminal completes random access after receiving the MSGB. This flow is not shown in Figure 5L.

With this method, the terminal can select the RACH resource with repeated PUSCH time domain to send the MSGA when sending the MSGA, so as to enhance the coverage of the PUSCH uplink transmission in the MSGA. When the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the network device will only allocate the PUSCH time-domain duplicate resources to the terminals that need coverage enhancement, avoiding the problem of allocating PUSCH time-domain duplicate resources to traditional terminals. It also allocates PUSCH time-domain repeated resources for terminals that need coverage enhancement, thereby improving the coverage of PUSCH uplink transmission in Msg3.

Based on the same inventive concept, an embodiment of the present application further provides a terminal device. The terminal device may have a structure as shown in FIG. 6 and have the behavior functions of the terminal device in the method embodiments given in FIG. 4A and FIG. 4J above. . As shown in FIG. 6 , the terminal device 600 may include a transceiving unit 601 and a processing unit 602, and the transceiving unit 601 may be configured to send a first message, namely Msg1 (random access preamble) to the network device, and receive the transmission from the network device. The second message is Msg2 (Random Access Response). The processing unit 602 can parse and obtain its own MAC RAR according to the received Msg2, and parse to obtain the number of repetitions of the corresponding PUSCH resource.

Wherein, the repetition times of the PUSCH resource is indicated by the R reserved field and the Padding field in Msg2.

In an optional embodiment, the R reserved field in the MAC RAR structure is used to indicate whether it is a PUSCH repeated resource. When the value of the R reserved field in the MAC RAR is 1, it means that the PUSCH resource allocated in the MAC RAR is a PUSCH time domain repetitive resource; when the value of the R reserved field in the MAC RAR is 0, it means that the PUSCH resource allocated in the MAC RAR is allocated in the PUSCH time domain. The PUSCH resources are PUSCH time-domain non-repetitive resources. In addition, the first field is used in Padding to indicate the number of repetitions of the PUSCH time-domain repetition resource. Optionally, use the value of R reserved resource in the MAC RAR to be 1 to indicate that the number of repetitions of the PUSCH time-domain repetitive resource is N, where N can be 2 or 4, so that there is no need to add a new first in Padding. field to indicate the number of repetitions of the PUSCH time-domain repetition resource.

During implementation, the processing unit 602 performs analysis according to the structure of the above Msg2 to obtain the position of the PUSCH time-domain repetition resource and the number of repetitions of the corresponding PUSCH time-domain repetition resource.

It should be noted that this embodiment can only be used on the terminal equipment in the NR system, and cannot be used on the terminal equipment in the LTE system, because the R reserved field of the MAC RAR in the LTE system has been occupied by the standard.

In an optional implementation manner, a bit is used in the Padding field of Msg2 to represent the repetition times indication bit, when the repetition times indication bit is 1, it means that the terminal is allocated PUSCH time domain repetition resources, and the repetition times indication bit is When it is 0, it means that the terminal is allocated a PUSCH time domain non-repetitive resource. After all the repetition times indication bits, for the repetition times indication bits whose value is 1, there is a corresponding second field for indicating the repetition times of the PUSCH resource.

In an optional implementation manner, according to the number of MAC RARs, a third field corresponding to one-to-one MAC RARs is reserved in the Padding field of Msg2 to indicate the number of repetitions of the PUSCH resources allocated for the terminal.

In an optional implementation manner, the transceiver unit 601 is configured to receive the configuration of the random access preamble sequence sent by the network device, and the configuration is divided into the configuration of the common random access preamble sequence and the random access preamble sequence with enhanced coverage Configuration. Optionally, the transceiver unit 601 directly selects a random access preamble sequence with enhanced coverage to perform random access. Optionally, the transceiver unit 601 selects a common random access preamble sequence or a coverage-enhanced random access preamble sequence to perform random access according to the measured signal quality.

The transceiver unit 601 is further configured to send a third message, namely Msg3 (RRC connection request) to the network device. Specifically, the transceiver unit 601 obtains the PUSCH resource location and the PUSCH resource location by parsing Msg2 (random access response). Repeated times to send Msg3 to network device. The transceiver unit 601 is further configured to receive a fourth message sent by the network device, where the fourth message is Msg4 (RRC connection establishment). In implementation, the terminal device 600 may further be provided with a storage unit 603, and the storage unit 603 may be coupled with the processing unit 602 for storing programs and instructions required by the processing unit 602 to perform functions.

Based on the same inventive concept, an embodiment of the present application further provides a network device. The network device may have the structure shown in FIG. 7 and have the behavior functions of the network device in the method embodiments shown in FIGS. 4A and 4J . As shown in FIG. 7 , the network device 700 may include a transceiving unit 701 and a processing unit 702, and the transceiving unit may be configured to receive a first message sent by the terminal device. The first message is Msg1 (random access preamble), so The processing unit 702 is configured to measure and obtain the signal quality according to the received Msg1, and the processing unit 702 is further configured to indicate the PUSCH resource of the terminal device in the generated second message when the measured signal quality is lower than the first threshold. The number of repetitions, the second message is Msg2 (random access response).

Wherein, the repetition times of the PUSCH resource is indicated by the R reserved field and the Padding field in the Msg2 structure.

In an optional embodiment, the R reserved field in the MAC RAR structure is used to indicate whether it is a PUSCH repeated resource. When the value of the R reserved field in the MAC RAR is 1, it means that the PUSCH resource allocated in the MAC RAR is a PUSCH time domain repetitive resource; when the value of the R reserved field in the MAC RAR is 0, it means that the PUSCH resource allocated in the MAC RAR is allocated in the PUSCH time domain. The PUSCH resources are PUSCH time-domain non-repetitive resources. In addition, the first field is used in Padding to indicate the number of repetitions of the PUSCH time-domain repetition resource. Optionally, use the value of R reserved resource in the MAC RAR to be 1 to indicate that the number of repetitions of the PUSCH time-domain repetitive resource is N, where N can be 2 or 4, so that there is no need to add a new first in Padding. field to indicate the number of repetitions of the PUSCH resource.

During implementation, the processing unit 702 generates a Msg2 according to the above-mentioned structure of the Msg2, and the Msg2 indicates the position of the PUSCH time-domain repeated resource and the number of repetitions of the PUSCH time-domain repeated resource in the terminal device.

It should be noted that this embodiment can only be used on the network equipment in the NR system, and cannot be used on the network equipment in the LTE system, because the R reserved field of the MAC RAR in the LTE system has been occupied by the standard.

During implementation, the processing unit 702 generates the Msg2 according to the above-mentioned structure of the Msg2, and the Msg2 indicates the position of the PUSCH time-domain repetition resource and the repetition times of the PUSCH time-domain repetition in the terminal device.

In an optional implementation manner, the transceiver unit 701 is configured to send a random access preamble sequence configuration to the terminal, and the configuration is divided into a common random access preamble sequence configuration and a coverage enhanced random access preamble sequence configuration. configuration.

The processing unit 701 is further configured to, when allocating downlink PDSCH resources for Msg2, consider the size occupied by the field indicating the information on the repetition times of the PUSCH resources, to allocate appropriate PDSCH resources.

The transceiver unit 701 is further configured to send the generated Msg2 to the terminal device. The transceiver unit 701 is further configured to receive a third message sent by the terminal device, where the third message is Msg3 (RRC connection request), and the processing unit 702 is further configured to combine and jointly decode multiple received Msg3s. The transceiver unit 701 is further configured to send Msg4 (RRC connection establishment) to the terminal device. In implementation, the network device 700 may further be provided with a storage unit 703, and the storage unit 703 may be coupled with the processing unit 702 for storing programs and instructions required by the processing unit 702 to perform functions.

Based on the same inventive concept, an embodiment of the present application further provides a terminal device. The terminal device may have the structure shown in FIG. 8 and have the behavior functions of the terminal device in the method embodiments given in the above-mentioned FIG. 5A and FIG. 5J . . As shown in FIG. 8 , the terminal device 800 may include a transceiving unit 801 and a processing unit 802. The transceiving unit 801 may be configured to receive at least two RACH resource configurations sent by the network device, and the at least two RACH resource configurations include the PUSCH time domain Repeated resources and PUSCH time-domain non-repetitive resources, the transceiver unit 801 can also be used to receive the second threshold sent by the network device, and the transceiver unit 801 can also be used to receive the signal sent by the network device to measure and obtain signal quality, The processing unit 802 may be configured to select a PUSCH time-domain repetitive resource to send the first message when the signal quality is lower than the second threshold; and select a PUSCH time-domain non-repetitive resource when the signal quality is not lower than the second threshold to send a first message, where the first message is MSGA, the transceiver unit 801 may also be configured to send the MSGA to the network device, and the transceiver unit 801 may also be configured to receive the MSGB sent by the network device. In implementation, the terminal device 800 may further have a storage unit 803, and the storage unit 803 may be coupled with the processing unit 802 for storing programs and instructions required by the processing unit 802 to perform functions.

In an optional implementation manner, the network device does not configure the second threshold for the terminal device, and the processing unit 802 of the terminal device autonomously selects the size of the second threshold, or specifies the size of the second threshold in a standard.

In an optional implementation manner, when the network device correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the transceiver unit 801 is configured to receive a second message sent by the network device, where the second message is MSGB and parses Obtain the corresponding fallback RAR (fallback RAR) and the resource indication of the PUSCH time domain repetition. The transceiver unit 802 is further configured to repeatedly send the PUSCH uplink data, that is, Msg3 (RRC connection request) according to the instruction of the MSGB.

Based on the same inventive concept, an embodiment of the present application also provides a network device. The network device may have the structure shown in FIG. 9 and have the behavior functions of the network device in the method embodiments shown in FIGS. 5A and 5J . As shown in FIG. 9, the network device 900 may include a transceiver unit 901 and a processing unit 902, the transceiver unit may be configured to send at least two RACH resource configurations to the terminal device, and the at least two RACH resource configurations include PUSCH time domain repetition resources and PUSCH time domain non-repetitive resources, the transceiver unit 901 can also be used to send the second threshold to the terminal device, the transceiver unit 901 can also be used to receive the first message sent by the terminal device, the first message For MSGA, the processing unit 902 may be configured to parse the uplink data in the MSGA sent by the terminal device according to the RACH resource configuration. In implementation, the network device 900 may further be provided with a storage unit 903, and the storage unit 903 may be coupled with the processing unit 902 for storing programs and instructions required by the processing unit 902 to perform functions.

In an optional embodiment, when the transceiver unit 901 correctly parses the MSGA to obtain the Preamble, but fails to parse the PUSCH uplink data, the transceiver unit 901 sends a second message to the terminal device, where the second message is MSGB, where in the MSGB Allocate the terminal equipment with PUSCH time-domain repeated resources.

In addition, the terminal device involved in the embodiments of the present application may also have the structure of the terminal device 1000 as shown in FIG. . The processor 1001 includes one or more processing cores, and the processor 1001 executes various functional applications and information processing by running software programs and modules. The receiver 1002 and the transmitter 1003 may be implemented as a communication component, which may be a baseband chip. The memory 1004 is connected to the processor 1001 through the bus 1005 . The memory 1004 may be used to store program instructions, and the processor 1001 may be used to execute the program instructions, so that the terminal device 1000 implements the technical solutions of the foregoing embodiments. The implementation principle and technical effect thereof are similar to the related embodiments of the above method, and are not repeated here.

In addition, the network device involved in the embodiments of the present application may also have the structure of the network device 1100 shown in FIG. . The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and information processing by running software programs and modules. The receiver 1102 and the transmitter 1103 may be implemented as a communication component, which may be a baseband chip. The memory 1104 is connected to the processor 1101 through the bus 1105 . The memory 1104 may be used to store program instructions, and the processor 1101 may be used to execute the program instructions, so that the network device 1100 implements the technical solutions of the foregoing embodiments. The implementation principle and technical effect thereof are similar to the related embodiments of the above method, and are not repeated here.

Based on the same concept as the above-mentioned method embodiments, the embodiments of the present application further provide a computer-readable storage medium on which instructions are stored. When these instructions are invoked and executed by a computer, the computer can complete the above-mentioned method embodiments and method embodiments. of the methods involved in any of the possible designs. In the embodiments of the present application, the computer-readable storage medium is not limited, for example, it may be random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), and the like.

Based on the same concept as the foregoing method embodiments, the embodiments of the present application further provide a computer program product, which, when invoked and executed by a computer, can complete the method embodiments and the methods involved in any possible designs of the foregoing method embodiments. .

Based on the same concept as the above method embodiments, the embodiments of the present application further provide a chip, which is coupled with a transceiver, and is used to implement the methods involved in the above method embodiments and any possible implementation manners of the method embodiments. , where "coupling" means that two components are directly or indirectly combined with each other, this combination may be fixed or movable, and this combination may allow flowing fluid, electricity, electrical signals or other types of signals between the two communication between components.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSD)), and the like.

The various illustrative logic units and circuits described in the embodiments of this application may be implemented by general purpose processors, digital signal processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, Discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. A general-purpose processor may be a microprocessor, or alternatively, the general-purpose processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a digital signal processor core, or any other similar configuration. accomplish.

The steps of the method or algorithm described in the embodiments of this application may be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. A software unit may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. Illustratively, a storage medium may be coupled to the processor such that the processor may read information from, and store information in, the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and storage medium may be provided in the ASIC, and the ASIC may be provided in the terminal device. Alternatively, the processor and the storage medium may also be provided in different components in the terminal device.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Although the invention has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made therein without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention as defined by the appended claims, and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

A method for coverage enhancement, applied in a random access procedure of a terminal, the method comprising:

sending, by the terminal, a first message to the network device, where the first message includes a random access preamble;

The terminal receives a second message sent by the network device, where the second message is used to indicate the physical uplink shared channel PUSCH time domain repeated resources of the terminal, and the PUSCH time domain repeated resources are passed through the second message. reserved field or filled field indication;

In response to the second message, the terminal repeatedly sends a third message to the network device at the time-frequency position of the PUSCH resource indicated by the PUSCH time-domain repeated resource according to the number of repetitions indicated by the PUSCH time-domain repeated resource. message, the third message is a radio resource control RRC connection request;

The terminal receives a fourth message sent by the network device, where the fourth message is RRC connection establishment.
The method according to claim 1, wherein before the terminal sends the first message to the network device, the method further comprises:

The terminal receives a random access preamble sequence configuration sent by the network device, where the random access preamble sequence configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration.
The method according to claim 2, wherein the terminal sending the first message to the network device comprises:

The terminal sends the first message to the network device using the coverage-enhanced random access preamble sequence.
The method according to claim 3, wherein the terminal sends the first message to the network device using a coverage-enhanced random access preamble sequence, comprising:

The terminal measures the signal sent by the network device to obtain signal quality, and when the signal quality is lower than a third threshold, sends the first message to the network device by using the coverage-enhanced random access preamble sequence.
The method according to claim 4, wherein the third threshold is configured by the network device to the terminal, or the third threshold is set by the terminal autonomously.
The method according to any one of claims 1-5, wherein the random access procedure is a four-step random access, the first message is the random access preamble, and the second message is the random access Preamble response.
The method according to claim 1, wherein the random access procedure is a two-step random access, the first message is MSGA, the MSGA includes the random access preamble and PUSCH uplink data, the second message is for MSGB.
The method according to claim 7, wherein before the terminal sends the first message to the network device, the method further comprises:

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources.
The method according to claim 8, wherein the terminal sending the first message to the network device comprises:

The terminal measures the signal sent by the network device to obtain signal quality, and when the signal quality is lower than a second threshold, sends the first message to the network device by using the PUSCH time-domain repeated resource.
The method according to claim 9, wherein the second threshold is configured by the network device to the terminal, or the second threshold is set by the terminal autonomously.
The method according to any one of claims 2-5, wherein the random access procedure is a two-step random access, the first message is MSGA, and the MSGA includes the random access preamble and PUSCH uplink data , the second message is MSGB.
The method according to claim 11, wherein the terminal receives a random access preamble sequence configuration sent by the network device, and the random access preamble sequence configuration includes a common random access preamble sequence configuration and coverage enhancement Random access preamble sequence configuration, including:

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include a PUSCH time-domain repetitive resource configuration and a PUSCH time-domain non-repetitive resource configuration , wherein the PUSCH time-domain non-repetitive resource configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration, and the PUSCH time-domain repeated resource configuration includes a coverage-enhanced random access preamble sequence configuration.
The method according to claim 12, wherein the terminal sending the first message to the network device comprises:

The terminal measures the signal sent by the network device to obtain signal quality, and when the signal quality is lower than a fourth threshold, sends the first message to the network device by using the PUSCH time-domain repeated resource.
The method according to claim 12, wherein the terminal sending the first message to the network device comprises:

The terminal measures the signal sent by the network device to obtain the signal quality, and when the signal quality is not lower than the fourth threshold but lower than the fifth threshold, uses the coverage-enhanced random access preamble sequence configuration to send the The first message is to the network device, wherein the fourth threshold is lower than the fifth threshold.
A coverage enhancement method, applied in a random access procedure of a network device, includes:

receiving, by the network device, a first message sent by the terminal, where the first message includes a random access preamble;

In response to the first message, the network device sends a second message to the terminal, where the second message is used to indicate to the terminal physical uplink shared channel PUSCH time-domain repeated resources, the PUSCH time-domain repeated resources Indicated by a reserved field or a padding field in the second message;

receiving, by the network device, a third message sent by the terminal, where the third message is a radio resource control RRC connection request;

In response to the third message, the network device sends a fourth message to the terminal, where the fourth message is RRC connection establishment.
The method according to claim 15, wherein before the network device receives the first message sent by the terminal, the method further comprises:

The network device sends a random access preamble sequence configuration to the terminal, where the random access preamble sequence configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration.
The method according to claim 16, wherein the network device receives the first message sent by the terminal, comprising:

The network device receives the first message sent by the terminal using the coverage-enhanced random access preamble.
The method according to any one of claims 15-17, wherein, in response to the first message, the network device sends a second message to the terminal, where the second message is used to instruct the terminal Physical uplink shared channel PUSCH time domain repeated resources, the PUSCH time domain repeated resources are indicated by the reserved field or padding field in the second message, including:

The network device measures the first message to obtain signal quality;

The network device sends the second message to the terminal in response to the first message, and when the signal quality is lower than the first threshold, the second message is used to indicate the physical uplink shared channel PUSCH to the terminal Time-domain repeated resources, the PUSCH time-domain repeated resources are indicated by a reserved field or a padding field in the second message.
The method according to any one of claims 15-18, wherein the random access procedure is a four-step random access, the first message is the random access preamble, and the second message is the random access preamble. It is the random access preamble response.
The method according to claim 15, wherein the random access procedure is a two-step random access, the first message is MSGA, the MSGA includes the random access preamble and PUSCH uplink data, the second message is for MSGB.
The method according to claim 20, wherein before the network device receives the first message sent by the terminal, the method further comprises:

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources.
The method according to claim 21, wherein the network device receives the first message sent by the terminal, comprising:

The network device receives the first message sent by the terminal using the PUSCH time-domain repeated resource.
The method according to any one of claims 16-18, wherein the random access procedure is a two-step random access, the first message is MSGA, and the MSGA includes the random access preamble and PUSCH uplink data, the second message is MSGB.
The method according to claim 23, wherein the network device sends a random access preamble sequence configuration to the terminal, and the random access preamble sequence configuration includes a common random access preamble sequence configuration and a coverage-enhanced sequence configuration. Random access preamble sequence configuration, including:

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include a PUSCH time-domain repetitive resource configuration and a PUSCH time-domain non-repetitive resource configuration, The PUSCH time-domain non-repetitive resource configuration includes a common random access preamble sequence configuration and a coverage-enhanced random access preamble sequence configuration, and the PUSCH time-domain repeated resource configuration includes a coverage-enhanced random access preamble sequence configuration.
The method according to claim 24, wherein the network device receives the first message sent by the terminal, comprising:

receiving, by the network device, the first message sent by the terminal using the PUSCH time-domain repeated resource configuration, or,

The network device receives the first message sent by the terminal using the coverage-enhanced random access preamble sequence configuration.
A coverage enhancement method is applied to a random access procedure of a terminal, where the random access procedure is a two-step random access procedure, including:

The terminal receives at least two random access channel RACH resource configurations sent by the network device, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources;

The terminal sends a first message to the network device using the PUSCH time-domain repeated resource, where the first message is an MSGA, and the MSGA includes a random access preamble and PUSCH uplink data.

The terminal receives a second message sent by the network device, where the second message is MSGB.
The method according to claim 26, wherein the terminal sends the first message to the network device by using the PUSCH time-domain repeated resources, comprising:

The terminal measures the signal sent by the network device to obtain signal quality, and when the signal quality is lower than a second threshold, sends the first message to the network device by using the PUSCH time-domain repeated resource.
The method according to claim 27, wherein the second threshold is configured by the network device to the terminal, or the second threshold is set by the terminal autonomously.
A coverage enhancement method is applied to a random access procedure of a network device, wherein the random access procedure is a two-step random access procedure, including:

The network device sends at least two random access channel RACH resource configurations to the terminal, where the at least two random access channel RACH resource configurations include PUSCH time-domain repetitive resources and PUSCH time-domain non-repetitive resources;

The network device receives a first message sent by the terminal using the PUSCH time-domain repeated resource, where the first message is an MSGA, and the MSGA includes a random access preamble and PUSCH uplink data.

In response to the first message, the network device sends a second message to the terminal, where the second message is MSGB.
An apparatus, applied in a terminal, characterized in that the apparatus comprises a processor, which is configured to be coupled with a memory, read instructions in the memory, and cause the terminal to execute claims 1 to 1 according to the instructions 14. The method of any one.
An apparatus, applied in a network device, characterized in that the apparatus includes a processor, and the processor is configured to be coupled with a memory, and read instructions in the memory and cause the network device to execute the claims according to the instructions The method of any one of 15 to 25.
A computer-readable storage medium comprising instructions, characterized in that, when the instructions are executed on a terminal, the terminal is made to execute the method of any one of claims 1 to 14.
A computer-readable storage medium comprising instructions, characterized in that, when the instructions are executed on a network device, the network device causes the network device to perform the method of any one of claims 15 to 25.