CN113473641A

CN113473641A - Communication method and communication device

Info

Publication number: CN113473641A
Application number: CN202010243580.2A
Authority: CN
Inventors: 张云昊; 骆喆; 徐修强; 陈雁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-01
Also published as: WO2021197109A1

Abstract

The embodiment of the application provides a communication method and a communication device, which enable network equipment to acquire a transmission mode adopted by terminal equipment by implicitly indicating the transmission mode adopted by the terminal equipment through PUSCH related information. Thus, when the network device detects the PUSCH related information, the network device can know the transmission mode adopted by the terminal device, and thus can know whether to detect the PRACH. When the network equipment learns that the PUSCH related information meets a first condition, the network equipment continues to detect the PRACH; when the PUSCH related information is acquired to meet the second condition, the PRACH is not detected continuously, so that the network equipment does not need to detect the PRACH every time, and the detection times of the network equipment are reduced.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and a communication apparatus.

Background

With the development of communication technology and the improvement of user requirements, terminal devices in a communication scene gradually exhibit characteristics of large quantity, multiple forms and the like. For example, in an industrial automation scenario, there are a large number of monitoring devices, machines, sensors, etc. in a plant; in the family and life scenes, a large number of mobile phones, flat panels, wearable devices, smart home appliances, vehicle-mounted terminal devices, or the like exist. The terminal device and the network device may perform uplink and/or downlink data transmission.

Disclosure of Invention

In view of this, the present application provides a communication method and a communication apparatus, which can reduce the detection complexity of a network device.

In a first aspect, a communication method is provided, including: a terminal device (or a chip or a processor in the terminal device) sends a Physical Uplink Shared Channel (PUSCH) to a network device; and sending a Physical Random Access Channel (PRACH) to the network equipment, wherein the PUSCH related information of the PUSCH meets a first condition; or, not transmitting the PRACH to the network device, wherein the PUSCH related information satisfies a second condition.

In the method, the relevant information of the PUSCH implicitly indicates the transmission mode adopted by the terminal equipment, so that the network equipment does not continue to detect the PRACH when knowing that the relevant information of the PUSCH meets the second condition, and the network equipment does not need to detect the PRACH every time, thereby reducing the detection times of the network equipment.

Optionally, the terminal device does not send a PUSCH in step 1 of the four-step random access method, but sends a PRACH to the network device, that is, the four-step random access method is adopted.

Optionally, the method further comprises: the terminal device is according to one or more of the following: and determining to send or not to send the PRACH to the network equipment according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell. Therefore, the terminal device can select a suitable transmission mode to transmit the uplink data (such as the uplink packet) according to the above factors, which is helpful for selecting a more suitable transmission mode according to the actual situation of the terminal device.

Optionally, the terminal device may select a CG mode to transmit the uplink packet, or select a two-step random access method to transmit the uplink packet, or select a four-step random access method to transmit the uplink packet, according to the above factors. Therefore, a more effective transmission mode can be selected according to the requirement, and the transmission efficiency is improved.

In a second aspect, a communication method is provided, including: a terminal device (or a chip or a processor in the terminal device) sends a Physical Uplink Shared Channel (PUSCH) to a network device; when the PUSCH related information of the PUSCH meets a first condition, the transmission mode of the PUSCH is a two-step random access method, and the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH); and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH. In the method, the PUSCH related information implicitly indicates the transmission mode adopted by the terminal equipment, so that the network equipment does not continue to detect the PRACH when knowing that the PUSCH related information meets the second condition, and the network equipment does not need to detect the PRACH every time, thereby reducing the detection times of the network equipment.

Optionally, the method further comprises: according to one or more of the following: and determining the transmission mode of the PUSCH according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell. That is, the terminal device may select the CG mode to transmit the uplink packet, or select the two-step random access method to transmit the uplink packet, or select the four-step random access method to transmit the uplink packet, taking the above factors into consideration. Specific effects can be referred to the description in the first aspect.

In the above first or second aspect, the method further comprises: and the terminal equipment receives configuration information from the network equipment, wherein the configuration information is used for indicating the first condition and the second condition. Here, the terminal device may know the specific contents of the first condition and the second condition from the network device.

In various implementations of the first and second aspects, the PUSCH related information includes a demodulation reference signal, DMRS, of the PUSCH, the PUSCH related information satisfies that a first condition includes that pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies that a second condition includes that pattern information of the DMRS is second pattern information; or, the PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information satisfies that a first condition comprises that the resource position of the DMRS is a first resource position, and the PUSCH related information satisfies that a second condition comprises that the resource position of the DMRS is a second resource position; or, the PUSCH related information includes the PUSCH, the PUSCH related information satisfying a first condition includes that the resource location of the PUSCH is a first resource location, and the PUSCH related information satisfying a second condition includes that the resource location of the PUSCH is a second resource location. Therefore, there may be various situations in which the content of the PUSCH related information in the present application may be included, and in each situation, the PUSCH related information satisfies the corresponding condition, that is, the content of the PUSCH related information is more diverse.

Optionally, the pattern information of the DMRS comprises one or more of the following parameters of the DMRS: sequence information, mapped time domain resource location, mapped frequency domain resource location, occupied symbol length, port number, cyclic shift. Therefore, the pattern information of different DMRSs can be distinguished through one or more of the above parameters, and the implementation is flexible.

In a third aspect, a communication method is provided, including: the method comprises the steps that a network device (or a chip or a processor in the network device) detects Physical Uplink Shared Channel (PUSCH) related information from a terminal device; in response to detecting the PUSCH-related information, the network device detects a Physical Random Access Channel (PRACH) from the terminal device when the PUSCH-related information satisfies a first condition, and does not detect the PRACH from the terminal device when the PUSCH-related information satisfies a second condition. Here, the network device continues to detect the PRACH when knowing that the PUSCH related information satisfies the first condition; when the PUSCH related information is acquired to meet the second condition, the PRACH is not detected continuously, so that the network equipment does not need to detect the PRACH every time, and the detection times of the network equipment are reduced.

Optionally, after detecting the PRACH, the network device may estimate the TA of the terminal device according to the random access preamble sequence carried in the PRACH, which is beneficial to more accurately demodulating the PUSCH when the TA value of the terminal device is invalid or inaccurate.

In one possible implementation, the method further includes: in response to not detecting the PUSCH-related information, the network device detects a PRACH from the terminal device. Here, if the network device detects the PRACH, a four-step random access method is performed.

In a fourth aspect, a communication method is provided, including: the method comprises the steps that a network device (or a chip or a processor in the network device) detects Physical Uplink Shared Channel (PUSCH) related information from a terminal device; responding to the detection of the PUSCH related information, and when the PUSCH related information meets a first condition, enabling the transmission mode of the PUSCH to be a two-step random access method, wherein the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH); and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH. Here, the network device continues to detect the PRACH when knowing that the PUSCH related information satisfies the first condition; when the PUSCH related information is acquired to meet the second condition, the PRACH is not detected continuously, so that the network equipment does not need to detect the PRACH every time, and the detection times of the network equipment are reduced.

In the above third or fourth aspect, the method further comprises: and the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for indicating the first condition and the second condition. That is, the network device may pre-configure the terminal device with the specific contents of the first condition and the second condition.

In various implementations of the third and fourth aspects, the PUSCH related information includes a demodulation reference signal, DMRS, of the PUSCH, the PUSCH related information satisfies that a first condition includes that pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies that a second condition includes that pattern information of the DMRS is second pattern information; or, the PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information satisfies that a first condition comprises that the resource position of the DMRS is a first resource position, and the PUSCH related information satisfies that a second condition comprises that the resource position of the DMRS is a second resource position; or, the PUSCH related information includes the PUSCH, the PUSCH related information satisfying a first condition includes that the resource location of the PUSCH is a first resource location, and the PUSCH related information satisfying a second condition includes that the resource location of the PUSCH is a second resource location. The specific technical effects can be referred to the description of the terminal device side.

Optionally, the pattern information of the DMRS comprises one or more of the following parameters of the DMRS: sequence information, mapped time domain resource location, mapped frequency domain resource location, occupied symbol length, port number, cyclic shift. The specific technical effects can be referred to the description of the terminal device side.

In a fifth aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect or the second aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. Optionally, the communication module comprises a sending module and/or a receiving module.

Exemplarily, the sending module is configured to send, by the network device, a physical uplink shared channel PUSCH; and sending a Physical Random Access Channel (PRACH) to the network equipment, wherein the PUSCH related information of the PUSCH meets a first condition; or, not transmitting the PRACH to the network device, wherein the PUSCH related information satisfies a second condition.

In one possible design, the processing module is configured to perform the processing according to one or more of the following: and determining to send or not to send the PRACH to the network equipment according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell.

Exemplarily, the sending module is configured to send, by the network device, a physical uplink shared channel PUSCH; when the PUSCH related information of the PUSCH meets a first condition, the transmission mode of the PUSCH is a two-step random access method, and the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH); and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH.

In one possible design, the processing module is configured to perform the processing according to one or more of the following: and determining the transmission mode of the PUSCH according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell.

In the fifth aspect, optionally, the receiving module is configured to receive configuration information from a network device, where the configuration information is used to indicate the first condition and the second condition.

In a possible design, specific contents included in the PUSCH related information and conditions that are satisfied may be referred to the foregoing detailed description, and are not specifically limited herein.

In a sixth aspect, an apparatus is provided, which may be a network device, an apparatus in a network device, or an apparatus capable of being used with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the third aspect or the fourth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. Optionally, the communication module comprises a sending module and/or a receiving module.

Exemplarily, the receiving module is configured to detect PUSCH related information of a physical uplink shared channel, PUSCH, from a terminal device;

in response to detecting the PUSCH-related information, detecting a Physical Random Access Channel (PRACH) from the terminal device when the PUSCH-related information satisfies a first condition, and not detecting the PRACH from the terminal device when the PUSCH-related information satisfies a second condition.

In one possible design, in response to not detecting the PUSCH related information, the processing module is further to detect a PRACH from the terminal device.

Exemplarily, the processing module is configured to detect PUSCH related information of a physical uplink shared channel, PUSCH, from a terminal device; responding to the detection of the PUSCH related information, and when the PUSCH related information meets a first condition, enabling the transmission mode of the PUSCH to be a two-step random access method, wherein the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH); and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH.

In the sixth aspect, optionally, the sending module is configured to send configuration information to a terminal device, where the configuration information is used to indicate the first condition and the second condition.

In a seventh aspect, an embodiment of the present application provides an apparatus, where the apparatus includes a processor, and is configured to implement the method described in the first aspect or the second aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect or the second aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

the processor is used for sending a Physical Uplink Shared Channel (PUSCH) to the network equipment by utilizing the communication interface; and the number of the first and second groups,

sending a Physical Random Access Channel (PRACH) to the network equipment, wherein the PUSCH related information meets a first condition; or the like, or, alternatively,

not transmitting the PRACH to the network device, wherein the PUSCH-related information satisfies a second condition.

In one possible design, the processor is further to perform the processing according to one or more of: and determining to send or not to send the PRACH to the network equipment according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell.

Or, the processor is configured to send a physical uplink shared channel PUSCH to a network device by using a communication interface;

when the PUSCH related information meets a first condition, the transmission mode of the PUSCH is a two-step random access method, and the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH);

and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH.

In one possible design, the processor is further to perform the processing according to one or more of: and determining the transmission mode of the PUSCH according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell.

In the seventh aspect, optionally, the processor receives configuration information from the network device using the communication interface, the configuration information indicating the first condition and the second condition.

In an eighth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the third aspect or the fourth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the third or fourth aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be terminal devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

the processor is used for detecting PUSCH (physical uplink shared channel) related information from the terminal equipment; in response to detecting the PUSCH-related information, detecting a Physical Random Access Channel (PRACH) from the terminal device when the PUSCH-related information satisfies a first condition, and not detecting the PRACH from the terminal device when the PUSCH-related information satisfies a second condition.

Or, the processor is configured to detect, from the terminal device, PUSCH related information of a physical uplink shared channel;

responding to the detection of the PUSCH related information, and when the PUSCH related information meets a first condition, enabling the transmission mode of the PUSCH to be a two-step random access method, wherein the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH); and when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH.

In one possible design, in response to not detecting the PUSCH related information, the processor is further configured to detect a PRACH from the terminal device.

In the eighth aspect, optionally, the processor sends configuration information to the terminal device by using the communication interface, the configuration information indicating the first condition and the second condition.

In a ninth aspect, this embodiment also provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect.

In a tenth aspect, an embodiment of the present application further provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method of the third aspect or the fourth aspect.

In an eleventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the function of the network device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a twelfth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the function of the terminal device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a thirteenth aspect, an embodiment of the present application provides a system, where the system includes the terminal device in the fifth aspect or the seventh aspect, and the network device in the sixth aspect or the eighth aspect.

In a fourteenth aspect, this embodiment also provides a computer program product, which includes instructions that, when executed on a computer, cause the computer to perform the method of the first, second, third or fourth aspect.

Drawings

Fig. 1 is a diagram showing an example of an architecture of a mobile communication system to which an embodiment of the present application is applied;

FIG. 2 is a schematic interaction diagram of a communication method according to an embodiment of the present application;

fig. 3 is a diagram showing an example of a communication method to which an embodiment of the present application is applied;

fig. 4 is a diagram of one pattern example of a reference signal of DMRS type 1;

fig. 5 is another pattern example diagram of a reference signal of DMRS type 1;

fig. 6 is a diagram of one pattern example of a reference signal of DMRS type 2;

fig. 7 is another pattern illustration of a reference signal of DMRS type 2;

fig. 8 is a diagram showing another example of a communication method to which the embodiment of the present application is applied;

fig. 9 is a diagram showing still another example of a communication method to which the embodiment of the present application is applied;

fig. 10 is a schematic block diagram of a communication apparatus to which an embodiment of the present application is applied;

fig. 11 is a schematic configuration diagram of a communication apparatus to which an embodiment of the present application is applied;

fig. 12 is another schematic configuration diagram of a communication apparatus to which the embodiment of the present application is applied.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a fifth generation (5th generation, 5G) system, a future introduced communication system or a fusion of multiple communication systems, and the like. Among them, 5G may also be referred to as New Radio (NR).

In a wireless communication system, communication devices are included, and wireless communication between the communication devices may be performed using air interface resources. The communication device may include a network device and a terminal device, and the network device may also be referred to as a network side device. The air interface resources may include at least one of time domain resources, frequency domain resources, code resources, and spatial resources. In the embodiments of the present application, at least one may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present application.

In the embodiments of the present application, "/" may indicate a relationship in which the objects associated before and after are "or", for example, a/B may indicate a or B; "and/or" may be used to describe that there are three relationships for the associated object, e.g., A and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. For convenience in describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" may be used to distinguish technical features having the same or similar functions. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily differ. In the embodiments of the present application, the words "exemplary" or "such as" are used to indicate examples, illustrations or illustrations, and any embodiment or design described as "exemplary" or "e.g.," should not be construed as preferred or advantageous over other embodiments or designs. The use of the terms "exemplary" or "such as" are intended to present relevant concepts in a concrete fashion for ease of understanding.

The terminal device related to the embodiment of the present application may also be referred to as a terminal, and may be a device with a wireless transceiving function, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a User Equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device having wireless communication functionality. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. In the embodiment of the present application, the apparatus for implementing the function of the terminal may be a terminal device; it may also be a device, such as a system-on-chip, capable of supporting the terminal to implement the function, which may be installed in the terminal. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.

The network device related to the embodiment of the present application includes a Base Station (BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal. The base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, and the like. Illustratively, the base station related to the embodiment of the present application may be a base station in a 5G system or a base station in LTE. Herein, a base station in the 5G system may also be referred to as a Transmission Reception Point (TRP) or a gNB. The network device may also be one or more antenna panels of a base station in a 5G system, or may also be a network node forming a gNB or a transmission point, such as a baseband unit (BBU), a Distributed Unit (DU), or the like. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. In some deployments, the gNB may include a Central Unit (CU) and a DU, each implementing part of the functionalities of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The gNB may also include an Active Antenna Unit (AAU). The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may serve as a network device in an access network, and may also serve as a network device in a Core Network (CN), which is not limited in this application. In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; or may be a device, such as a system-on-chip, capable of supporting the network device to implement the function, and the device may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example of a network device, and the technical solution provided in the embodiment of the present application is described.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication devices. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, and wireless communication between a terminal and a terminal. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission", or "transmission". The technical scheme can be used for carrying out wireless communication between the scheduling entity (such as network equipment) and the subordinate entity (such as terminal equipment). Wherein the scheduling entity can allocate resources for subordinate entities. Those skilled in the art can use the technical solution provided in the embodiments of the present application to perform wireless communication between other scheduling entities and subordinate entities, for example, wireless communication between a macro base station and a micro base station, for example, wireless communication between a first terminal and a second terminal.

Fig. 1 is a diagram of an example architecture of a mobile communication system to which an embodiment of the present application can be applied. As shown in fig. 1, the mobile communication system includes a radio access network device 120 and at least one terminal device (e.g., terminal device 130 and terminal device 140 in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode. The mobile communication system may further include a core network device 110. The wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or the function of the core network device and the logical function of the radio access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the radio access network device. The terminal equipment may be fixed or mobile. Fig. 1 is an illustration only, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

In the embodiments of the present application, if not specifically stated, the network devices are all referred to as radio access network devices.

It should be understood that, in the embodiment of the present application, the uplink data channel is used to carry uplink data, and may be, for example, a Physical Uplink Shared Channel (PUSCH). For convenience of description, only the PUSCH is taken as an example for explanation. The uplink data channel may have different names in different systems, and the embodiment of the present application does not limit the specific name of the channel.

Before describing the embodiments of the present application, some concepts or terms related to the embodiments of the present application will be briefly described for the convenience of understanding.

(1) Configuration authorization (CG)

The terminal equipment sends uplink packet data to the network equipment through a PUSCH (physical uplink shared channel) by using uplink transmission resources pre-configured by the network equipment or uplink transmission resources indicated by the network equipment for the terminal equipment through high-level signaling. The higher layer signaling may be RRC signaling or MAC Control Element (CE), and the configured content mainly includes one or more of the following parameters of PUSCH: time domain resources, frequency domain resources, demodulation reference signal (DMRS), number of repeated transmissions, modulation and coding scheme, redundancy version, number of hybrid automatic repeat request (HARQ) processes, and the like. For example, the packet data is a data packet with a Transport Block (TB) size smaller than 100 bytes (byte), or a data packet that can be transmitted in one slot. Optionally, the terminal device may also send a terminal Identifier (ID) to the network device. The CG resources configured by the network equipment in the RRC connection state of the terminal mainly comprise PUSCH resources and DMRS resources of the PUSCH. The CG resource used by the terminal device may be shared by multiple terminals or may be dedicated to one terminal. In this embodiment, the uplink packet data may also be referred to as an uplink packet (small data).

The technical solution provided in the embodiment of the present application may be used to transmit not only an uplink packet, but also data packets with other sizes, for example, a data packet with a TB size greater than 100 bytes or a data packet that can be completely transmitted in multiple slots.

(2) 2-step random access channel (2-step RACH)

The 2-step RACH scheme may also be referred to as a two-step random access method. The 2-step RACH scheme includes two steps.

Step 1, a terminal device sends a random access preamble (preamble) to a network device on a Physical Random Access Channel (PRACH) through a message a (Msg a), and sends an uplink packet to the network device in a corresponding PUSCH. Optionally, MsgA may also include a terminal ID. The preamble is also called a preamble (or preamble sequence), and is a sequence that can be used by the network device to determine a Timing Advance (TA) of the terminal device.

Step 2, the network device sends a Random Access Response (RAR) to the terminal device through the message B (Msg B). The RAR includes feedback information to inform the terminal device whether the uplink packet is received.

Different TA values for the terminal device result from different distances of the terminal device from the network device. The TA of the terminal device is typically determined by the network device through preamble detection.

(3) 4-step random access channel (4-step RACH)

The 4-step RACH scheme may also be referred to as a four-step random access method. A scheme of transmitting a small packet through the 4-step RACH is also called an Early Data Transmission (EDT) scheme. The 4-step RACH scheme includes 4 steps:

step 1, the terminal device sends preamble to the network device on PRACH through message 1 (Msg 1).

Step 2, the network device sends RAR (or message 2 (Msg 2)) to the terminal device, where the RAR includes uplink scheduling information of message 3(message 3, Msg 3). The RAR may be carried in a Physical Downlink Shared Channel (PDSCH).

And step 3, the terminal equipment sends the uplink packet to the network equipment through the Msg3 on the resource scheduled by the RAR. Alternatively, the Msg3 may include the ID of the terminal. Msg3 may be carried in PUSCH.

And 4, the network equipment sends feedback information to the terminal equipment through a message 4 (Msg 4) to inform the terminal equipment whether the uplink packet is successfully received. Msg4 may be carried in PDSCH.

In the 2-step RACH and the 4-step RACH, PRACH resources, preamble resources, PUSCH resources (including DMRS resources in PUSCH), and resources for receiving RAR are all configured to the terminal device by the network device when the terminal RRC is in a connected state, and/or configured to the terminal device by the network device in broadcast information or system messages.

The terminal device may perform an RRC establishment procedure with the network device during or after accessing the network device. After the terminal device and the network device establish the RRC connection, the RRC state of the terminal device is an RRC CONNECTED (RRC _ CONNECTED) state. Subsequently, the RRC state of the terminal device may transition among: an RRC IDLE (RRC _ IDLE) state, an RRC _ CONNECTED state, and an RRC INACTIVE (RRC _ INACTIVE) state.

In one possible implementation, data transmission between the network device and the terminal device is performed when the terminal device is in the RRC connected state. In some scenarios, only a small packet is transmitted between the network device and the terminal device for a longer time frame. After one-time packet transmission is completed, the terminal equipment is not required to be in the RRC _ CONNECTED state for a long time from the energy-saving point of view. Therefore, in another possible implementation, the terminal device may send the uplink packet to the network device in the RRC _ INACTIVE state, which may save signaling overhead and terminal device energy consumption. The feature that the terminal device is in the RRC _ INACTIVE state is that the network device may retain the core network registration information of the terminal device, but the terminal device suspends most of the air interface behaviors with the network device, such as suspending monitoring of scheduling information (i.e., receiving a PDCCH for scheduling unicast transmission of the UE, where the PDCCH is a PDCCH specific to the UE), sending a scheduling request, Radio Resource Management (RRM) measurement, beam maintenance, and the like. Therefore, the RRC _ INACTIVE state is a state in which the terminal saves power.

For uplink packet transmission in the RRC _ INACTIVE state, there may be three candidate transmission modes of configuration grant CG, 2-step RACH and 4-step RACH. The network equipment configures the transmission resources of the three transmission modes for the terminal equipment, and the terminal equipment selects one transmission mode to send the uplink packet. Since the network device does not know which transmission mode the terminal device selects, it needs to detect whether the terminal device sends information on all uplink resources, resulting in higher detection complexity at the network device side.

Fig. 2 is a schematic interaction diagram of a communication method 200 according to an embodiment of the application. It is understood that the terminal device in fig. 2 may be the terminal device in fig. 1 (e.g., the terminal device 130 or the terminal device 140), and may also refer to an apparatus (e.g., a processor, a chip, or a system-on-chip, etc.) in the terminal device. The network device may be the radio access network device 120 in fig. 1, and may also refer to an apparatus (e.g., a processor, a chip, or a system-on-chip, etc.) in the radio access network device. It is further understood that, in fig. 2, part or all of the information interacted between the terminal device and the network device may be carried in an existing message, channel, signal, or signaling, or may be a newly defined message, channel, signal, or signaling, which is not limited specifically. As shown in fig. 2, the method 200 includes:

s201, the terminal device sends PUSCH to the network device.

Optionally, the terminal device transmits the DMRS of the PUSCH to the network device. The DMRS may be located in resources allocated for the PUSCH.

As described herein, the communication method according to the embodiment of the present application is applicable to transmission of uplink data. For example, the transmission of the uplink data may include transmission of an uplink packet, but the embodiment of the present application is not limited thereto.

Describing that the uplink data is an uplink packet as an example, if the terminal device transmits the uplink packet by using a CG transmission mode or a two-step random access method, step 1 of the two-step random access method needs to transmit a PUSCH to the network device, where the PUSCH is used for carrying the uplink packet. Or, the terminal device may also send the uplink packet by using a four-step random access method. If the terminal device transmits the uplink packet by using the four-step random access method, the terminal device does not transmit the PUSCH to the network device in step 1 of the four-step random access method (corresponding to the method 200, the terminal device does not need to perform step S201), and transmits the PRACH in step 1 of the four-step random access method.

The explanation of the CG transmission method, the two-step random access method, and the four-step random access method may refer to the foregoing description, which is not repeated herein.

S202, the network equipment detects the PUSCH related information of the PUSCH from the terminal equipment.

The network device may or may not detect PUSCH related information. And if the network equipment detects the PUSCH related information, deciding whether to continue detecting the PRACH or not based on the condition met by the PUSCH related information.

S203, the terminal equipment sends the PRACH to the network equipment, wherein the PUSCH related information meets a first condition; or, not transmitting the PRACH to the network device, wherein the PUSCH related information satisfies the second condition.

Stated another way, when the PUSCH related information satisfies the first condition, the transmission mode of the PUSCH is a two-step random access method, and step 1 in the two-step random access method includes transmitting the PUSCH and the PRACH. That is, the terminal device transmits not only the PUSCH but also the PRACH to the network device in step 1 of the two-step random access method.

And when the PUSCH related information meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH. That is, the terminal device transmits PUSCH to the network device without transmitting PRACH.

S204, in response to the detection of the PUSCH related information, when the PUSCH related information meets a first condition, the network device detects a Physical Random Access Channel (PRACH) from the terminal device, and when the PUSCH related information meets a second condition, the network device does not detect the PRACH from the terminal device.

That is, the PUSCH related information indicates the transmission scheme adopted by the terminal device. For the network device, when detecting the PUSCH related information, the network device may know the transmission mode adopted by the terminal device, so as to know whether to detect the PRACH. Specifically, the network device continues to detect the PRACH when knowing that the PUSCH related information meets the first condition; and when the PUSCH related information is acquired to meet the second condition, the PRACH is not detected continuously. The method makes the network equipment unnecessary to detect the PRACH every time, thereby reducing the detection times of the network equipment. Moreover, if the PRACH is used by a plurality of terminal devices in a competitive manner, the network device is also facilitated to determine whether a certain terminal device sends a preamble on the PRACH, so that the detection complexity of the preamble can be reduced, and the detection accuracy of the preamble can be improved. In addition, the network device may estimate the TA value of the terminal device according to the preamble carried in the PRACH.

Optionally, the network device may not detect the PUSCH related information. Optionally, the method 200 further comprises: and S205, in response to not detecting the PUSCH related information, the network equipment detects the PRACH from the terminal equipment.

If the network device does not detect the PUSCH related information (e.g., does not detect the DMRS on the PUSCH), the network device considers that the terminal device may employ the four-step random access method and then detects on the PRACH. Here, if the network device detects the PRACH, a four-step random access method is performed. Specifically, the network device receives the PRACH from the terminal device, sends the RAR to the terminal device, receives the uplink packet from the terminal device, and finally sends feedback information to the terminal device through the PDSCH, where the feedback information is used to inform the terminal device whether the uplink packet is successfully received.

In the embodiment of the present application, there are different implementations in which the PUSCH related information satisfies the first condition or the second condition. As will be described in detail below.

Implementation mode one

The PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, and the step of satisfying the first condition comprises the following steps: the pattern information of the DMRS is first pattern information, and the step of satisfying the second condition by the PUSCH-related information comprises the steps of: the pattern information of the DMRS is second pattern information.

Illustratively, the first pattern information and the second pattern information are different DMRS patterns (patterns). That is, here, whether the terminal device transmits the preamble on the PRACH is implicitly indicated by the DMRS pattern. The first pattern information indicates that the terminal equipment sends the PUSCH, and does not send the preamble on the PRACH, namely the terminal equipment adopts a CG transmission mode. The second pattern information indicates that the terminal device sends the PUSCH in step 1 of the two-step random access method and sends the preamble on the PRACH, that is, the terminal device adopts the two-step random access method. Of course, if the terminal device adopts the four-step random access method, the PUSCH is not transmitted in step 1 of the four-step random access method.

Taking the example in fig. 3 as an example, as shown in fig. 3, if the terminal device adopts a CG transmission mode, a PUSCH is sent, and the PUSCH carries the first DMRS; and if the terminal equipment adopts the two-step random access method, sending the PUSCH in step 1 of the two-step random access method, wherein the PUSCH carries the second DMRS and sends the preamble on the PRACH. Wherein the pattern information of the first DMRS is different from the pattern information of the second DMRS. The pattern information of the first DMRS and the pattern information of the second DMRS may be distinguished by various means provided below. If the terminal equipment adopts the four-step random access method, the PUSCH is not sent in step 1 of the four-step random access method, but the preamble is sent on the PRACH. Correspondingly, after the network equipment detects the first DMRS in the PUSCH, the PRACH is not detected; after the network equipment detects the second DMRS in the PUSCH, the PRACH is continuously detected; and if the network equipment does not detect the PUSCH, detecting the PRACH.

Optionally, the pattern information of the DMRS includes one or more of the following parameters of the DMRS: sequence information, mapped time domain resource location, mapped frequency domain resource location, occupied symbol length, port number, cyclic shift.

The sequence information includes a calculation method of the sequence (a generation formula of the sequence) or a length of the sequence. That is, if the DMRS pattern information is distinguished by the DMRS sequence information, the distinguishing may include distinguishing by a sequence calculation method, or may include distinguishing by a sequence length, which is not limited thereto.

Mapped time domain resource location: the sequence of the DMRS is at a physical layer time domain resource location, e.g., an occupied symbol location, in a transmission slot.

Mapped frequency domain resource location: a sequence of the DMRS is at a physical layer frequency domain resource location, e.g., an occupied subcarrier location, a Resource Block (RB) location, in a transmission slot.

Cyclic shift: each element of the sequence of the DMRS is shifted by the same number of bits in a left shift or right shift mode, and the part vacated at one end is sequentially supplemented by the part shifted at the other end after the shift. Information can be carried by the number of shifts.

Occupied symbol length: for example, DMRS occupies 1 symbol or 2 symbols, or other number of symbols. Illustratively, the first pattern information may be different from the second pattern information by: the occupied symbol length is different.

Port number: port number of DMRS. Illustratively, the first pattern information and the second pattern information may be distinguished by a port number of the DMRS.

The following explains the related concept of distinguishing by DMRS port numbers. It is to be understood that the following description about the division of DMRS ports and the DMRS patterns illustrated in the drawings are only for ease of understanding, and do not limit the embodiments of the present application. In fact, there may be other partitioning schemes for DMRS ports, or there may be other examples for DMRS patterns.

DMRS ports are multiplexed using frequency-division multiplexing (FDM) and Code Division Multiplexing (CDM). Each DMRS CDM group is divided into multiple DMRS ports by Orthogonal Cover Code (OCC) multiplexing. Two DMRS types (including DMRS type 1 and DMRS type 2) may be supported. Wherein, the DMRS has a division of a single-preamble (Front-loaded) symbol and a dual-preamble symbol. DMRS type 1, a single preamble symbol supports 4 DMRS ports at most; DMRS type 1, the maximum of which supports 8 DMRS ports; DMRS type 2, a single preamble symbol supports 6 DMRS ports at most; DMRS type 2, dual preamble symbol supports a maximum of 12 DMRS ports. The multiplexing and configuration modes of the two DMRS types are described in detail as follows:

for reference signals of DMRS type 1, DMRS ports are divided into two DMRS CDM groups. The following is described with the examples in fig. 4 and 5.

For example, referring to fig. 4, for a DMRS (corresponding to an Orthogonal Frequency Division Multiplexing (OFDM) symbol with a number of 2, horizontal axis in the figure) of a (single) preamble symbol, subcarriers (vertical axis in the figure) of the OFDM symbol are divided into two groups, that is, the subcarriers of the OFDM symbol are divided into two DMRS CDM groups, and each DMRS CDM group corresponds to 2 DMRS ports multiplexed by a single OFDM symbol in an OCC manner. Referring to fig. 4, DMRS CDM group 0 corresponds to DMRS Resource Elements (REs) of antenna port 0/1, DMRS CDM group 1 corresponds to DMRS REs of antenna port 2/3, that is, DMRS CDM group 0 corresponds to DMRS port 0 and DMRS port 1, and DMRS CDM group 1 corresponds to DMRS port 2 and DMRS port 3.

For example, referring to fig. 5, for DMRSs of two (dual) preamble symbols (corresponding to OFDM symbols numbered 2 and 3), subcarriers of the OFDM symbol are divided into two groups, that is, the subcarriers of the OFDM symbol are divided into two DMRS CDM groups, and each DMRS CDM group corresponds to 4 DMRS ports where the dual OFDM symbols are multiplexed by an OCC method. Referring to fig. 5, DMRS REs corresponding to antenna port 0/1/4/5 in DMRS CDM group 0, DMRS REs corresponding to antenna port 2/3/6/7 in DMRS CDM group 1, i.e., DMRS port 0, DMRS port 1, DMRS port 4, and DMRS port 5 in DMRS CDM group 0, DMRS port 2, DMRS port 3, DMRS port 6, and DMRS port 7 in DMRS CDM group 1.

For DMRS type 2, DMRS ports are divided into three DMRS CDM groups. The following is described with examples in fig. 6 and 7.

For example, referring to fig. 6, for DMRS of one (single) preamble symbol (corresponding to OFDM symbol numbered 2), subcarriers of the OFDM symbol are divided into three groups, that is, the subcarriers of the OFDM symbol are divided into three DMRS CDM groups, and each DMRS CDM group corresponds to 2 DMRS ports where the single OFDM symbol is multiplexed by an OCC method. Referring to fig. 6, DMRS rs REs corresponding to antenna port 0/1 in DMRS CDM group 0, DMRS REs corresponding to antenna port 2/3 in DMRS CDM group 1, and DMRS REs corresponding to antenna port 4/5 in DMRS CDM group 2, that is, DMRS port 0 and DMRS port 1 in DMRS CDM group 0, DMRS port 2 and DMRS port 3 in DMRS CDM group 1, and DMRS CDM group 2, DMRS port 4 and DMRS port 5 in DMRS CDM group 2.

For example, referring to fig. 7, for DMRSs of two (dual) preamble symbols (corresponding to OFDM symbols numbered 2 and 3), subcarriers of the OFDM symbol are divided into three groups, that is, the subcarriers of the OFDM symbol are divided into three DMRS CDM groups, and each DMRS CDM group corresponds to 4 OFDM ports where the dual OFDM symbols are multiplexed by an OCC method. Referring to fig. 7, DMRS CDM group 0 corresponds to DMRS REs of antenna port 0/1/6/7, DMRS CDM group 1 corresponds to DMRS REs of antenna port 2/3/8/9, DMRS CDM group 2 corresponds to DMRS REs of antenna port 4/5/10/11, that is, DMRS CDM group 0 corresponds to DMRS port 0, DMRS port 1, DMRS port 6, and DMRS port 7, DMRS CDM group 1 corresponds to DMRS port 2, DMRS port 3, DMRS port 8, and DMRS port 9, and DMRS CDM group 2 corresponds to DMRS port 4, DMRS port 5, DMRS port 10, and DMRS port 11.

Only DMRS type 1 may be used if transform precoding (transform precoding) is enabled, i.e., when a discrete Fourier spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform is used in uplink, and DMRS type 1 or DMRS type 2 may be used if transform precoding (transform precoding) is not enabled, i.e., when a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform is used.

A related description of DMRS configuration will be introduced below.

The resource mapping formula of the DMRS under the CP-OFDM waveform is as follows:

k′＝0,1

n＝0,1,...

j＝0,1,...,υ-1

the resource mapping formula of the DMRS under the DFT-s-OFDM waveform is as follows:

k＝4n+2k′+Δ

k′＝0,1

n＝0,1,...

wherein, Configuration type 1 represents DMRS type 1, Configuration type 2 represents DMRS type 2, k is frequency domain position, l is time domain position, delta is frequency domain offset, w_f(k') and w_t(l') denotes OCC in frequency domain and time domain respectively,

the intermediate quantity before precoding and physical resource mapping operation is performed is represented, j represents a PUSCH layer index, upsilon represents a PUSCH total layer number, r (2n + k ') represents a DMRS sequence, and values of k ' and l ' refer to the following tables 1 and 2.

Through the following table 1 (corresponding to DMRS type 1) and table 2 (corresponding to DMRS type 2), parameters of each DMRS port in DMRS type 1 or DMRS type 2 may be determined, and then the resource of each DMRS port may be determined according to the above-mentioned resource mapping formula for DMRS.

TABLE 1 Parameters for PUSCH DM-RS configuration type 1 (Parameters of DMRS type 1 for PUSCH)

TABLE 2 Parameters for PUSCH DM-RS configuration type 2 (Parameters of DMRS type 2 for PUSCH)

In addition, in one possible implementation, whether dynamically scheduled or unlicensed transmission, the network device may explicitly indicate the DMRS port or ports used by the terminal PUSCH transmission. The specific indication method is to indicate antenna port indication information, waveform, DMRS type, DMRS time domain maximum length, and channel (rank) number through RRC message or Downlink Control Information (DCI). Each configuration except the antenna port indication information may correspond to a table indicated by one DMRS port, as shown in table 3, the DMRS type 1 is shown in a CP-OFDM waveform, the maximum time length of a DMRS time domain is 2 preamble symbols, and the rank number is 4, where the antenna port indication information is used to indicate a specific table entry in the determined DMRS port indication table, for example, when the antenna port indication information is 0, it indicates that a user cannot map data on two DMRS CDM groups, the actual time domain length of the preamble DMRS is 1 symbol, and after actual random access, the DMRS port used for PUSCH transmission is 0 to 3. Table 3 is as follows:

table 3, Antenna port(s), transform coder is disabled, DMRS-Type 1, maxLength 2, rank 4 (Antenna port, transform-disabled precoding (CP-OFDM waveform), DMRS Type 1, DMRS time domain maximum length 2, channel number 4)

Implementation mode two

The PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information satisfies that a first condition comprises that the resource position of the DMRS is a first resource position, and the PUSCH related information satisfies that a second condition comprises that the resource position of the DMRS is a second resource position.

The first resource location is different from the second resource location. Optionally, the first resource location is different from the second resource location, including: the first resource location and the second resource location are different in time domain and/or the first resource location and the second resource location are different in frequency domain.

For the network device, if the network device detects that the terminal device transmits the DMRS on the first resource location, the network device considers that the terminal device selects the CG transmission method, and then the network device does not detect the PRACH any more. If the network device detects that the terminal device sends the DMRS on the second resource location, the network device considers that the terminal device selects the two-step random access method, and then the network device needs to detect the preamble on the PRACH.

Taking the example in fig. 8 as an example, as shown in fig. 8, if the terminal device adopts the CG transmission scheme, the DMRS is transmitted on DMRS position 1 through PUSCH; if the terminal equipment adopts a two-step random access method, the DMRS is sent on the DMRS position 2 through the PUSCH, and the preamble is sent on the PRACH. DMRS position 1 and DMRS position 2 are different, e.g., the starting time domain position of DMRS position 1 is earlier than the starting time domain position of DMRS position 2. If the terminal equipment adopts the four-step random access method, the terminal equipment does not send the PUSCH in step 1 of the four-step random access method, but sends the preamble on the PRACH. Correspondingly, if the network equipment detects that the DMRS is on the DMRS position 1, the network equipment considers that the CG transmission mode is selected by the terminal equipment, and does not detect the PRACH; if the network equipment detects that the DMRS is on the DMRS position 2, the PRACH is detected if the terminal equipment selects a two-step random access method; and if the network equipment does not detect the PUSCH, considering that the terminal equipment selects a four-step random access method, and detecting the PRACH.

Implementation mode three

The PUSCH related information comprises the PUSCH, the PUSCH related information satisfies a first condition and comprises that the resource position of the PUSCH is a first resource position, and the PUSCH related information satisfies a second condition and comprises that the resource position of the PUSCH is a second resource position.

It can be understood that the first resource location and the second resource location of implementation three are for PUSCH, the first resource location and the second resource location of implementation two are for DMRS, that is, the first resource location and the second resource location of implementation three, and the first resource location and the second resource location of implementation two may have no relation.

For the network device, if the network device detects that the terminal device sends the PUSCH on the first resource location, it is considered that the terminal device selects the CG transmission mode, and then the network device does not detect the PRACH any more. If the network device detects that the terminal device sends the PUSCH on the second resource position, the network device considers that the terminal device selects the two-step random access method, and then the network device needs to detect the preamble on the PRACH.

Taking the example in fig. 9 as an example, as shown in fig. 9, if the terminal device adopts the CG transmission scheme, the PUSCH is transmitted at PUSCH position 1; and if the terminal equipment adopts a two-step random access method, sending the PUSCH at a PUSCH position 2 and sending the preamble on the PRACH. PUSCH position 1 is different from PUSCH position 2, for example, the starting time domain position of PUSCH position 1 is earlier than the starting time domain position of PUSCH position 2. If the terminal equipment adopts the four-step random access method, the terminal equipment does not send the PUSCH in step 1 of the four-step random access method, but sends the preamble on the PRACH. Correspondingly, if the network equipment detects that the PUSCH is at the PUSCH position 1, the network equipment considers that the terminal equipment selects a CG transmission mode, and does not detect the PRACH; if the network equipment detects that the PUSCH is on the PUSCH position 2, the network equipment considers that the terminal equipment selects a two-step random access method, and then the PRACH is detected; and if the network equipment does not detect the PUSCH, considering that the terminal equipment selects a four-step random access method, and detecting the PRACH.

It is to be understood that the above three implementations may be used independently or in combination, and are not particularly limited thereto.

In the embodiment of the present application, which transmission method the terminal device selects (one selected from CG, a two-step random access method, or a four-step random access method, or one selected from CG and a two-step random access method, or one selected from CG and a four-step random access method), some factors may be considered. Optionally, the method 200 further comprises: the terminal device is according to one or more of the following: determining to send or not to send a PRACH to a network device based on a Timing Advance (TA), a Reference Signal Receiving Power (RSRP), and whether the terminal device moves to a neighboring cell.

As an implementation, the terminal device decides which transmission method to select according to whether the TA value is valid. For example, if the terminal device determines that the TA value is valid, a CG transmission mode is selected, that is, a PUSCH is transmitted to the network device, and a PRACH is not transmitted; if the terminal equipment judges that the TA value is invalid, a two-step random access method is selected, namely PUSCH is sent to the network equipment, and PRACH is sent to the network equipment.

The manner in which the terminal device determines whether the TA value is valid is not limited herein. Optionally, the terminal device may determine whether the TA value is valid by determining whether the timer is overtime or whether the terminal device moves to the neighboring cell. The time at which the timer starts to operate is not particularly limited. For example, the terminal device starts timing from the state RRC INACTIVE entered. For another example, the terminal device starts timing after obtaining configuration information sent by the network device, where the configuration information is used to indicate the first condition and the second condition (S206 will be described in detail below).

For example, if the timer is overtime, the terminal device considers that the TA value is invalid; and if the timer is not overtime, the terminal equipment considers that the TA value is valid. For another example, if the terminal device moves to the neighboring cell, the terminal device considers that the TA value is invalid; and if the terminal equipment does not move to the adjacent cell, the terminal equipment considers that the TA value is valid.

As an implementation manner, the terminal device determines which transmission manner to select according to a relationship between the detected RSRP value and the threshold. For example, if the RSRP value detected by the terminal device is lower than the first threshold, a four-step random access method is selected, that is, the PRACH is sent to the network device, and the PUSCH is not sent in step 1 of the four-step random access method; if the RSRP value detected by the terminal equipment is lower than the second threshold, selecting a two-step random access method, namely sending a PUSCH to the network equipment in step 1 of the two-step random access method, and sending a PRACH to the network equipment; and if the RSRP value detected by the terminal equipment is higher than the second threshold, selecting a CG transmission mode, namely sending a PUSCH to the network equipment and not sending the PRACH.

The obtaining manner of the first threshold and/or the second threshold is not limited here, and may be defined by a protocol, or may be configured or indicated to the terminal device by the network device.

As an implementation manner, the terminal device decides which transmission method to select according to whether to move to the neighboring cell. For example, if the terminal device moves to the neighboring cell, the terminal device selects a two-step random access method, that is, sends a PUSCH to the network device of the neighboring cell and sends a PRACH to the network device of the neighboring cell, or the terminal device selects a four-step random access method, that is, sends a PRACH to the network device of the neighboring cell and does not send a PUSCH in step 1 of the four-step random access method; if the terminal equipment does not move to the adjacent cell, the terminal equipment selects a CG transmission mode, namely, the terminal equipment sends PUSCH to the network equipment of the adjacent cell and does not send PRACH.

Here, the manner of determining whether or not to move to the neighboring cell is not limited. Illustratively, the terminal device may determine whether it has moved to a neighboring Cell based on detecting a Cell identification (e.g., Cell ID) indicated by a synchronization signal in a Synchronization Signal Block (SSB).

In this embodiment of the present application, a relationship between a condition that the PUSCH related information satisfies and a corresponding transmission mode may be defined by a protocol, that is, both the terminal device and the network device can know in advance. Alternatively, the relationship between the condition that the PUSCH related information satisfies and the corresponding transmission method may be configured, by the network device, to the terminal device through broadcast system information or RRC signaling, which is not limited to this.

Optionally, the method 200 further comprises: s206, the network device sends configuration information to the terminal device, wherein the configuration information is used for indicating the first condition and the second condition. Correspondingly, the terminal equipment receives the configuration information. Illustratively, the network device may transmit the configuration information to the terminal device through system information, RRC message, MAC CE, or DCI signaling.

For example, the network device may carry specific contents of the first condition and the second condition in the configuration information, such as the first pattern information, the second pattern information, and further, for example, the first resource location of the DMRS, the second resource location of the DMRS, and further, for example, the first resource location of the PUSCH, and the second resource location of the PUSCH.

For example, the network device may indicate, in the configuration information, a correspondence relationship between a condition that the PUSCH related information satisfies and a transmission method. For example, the configuration information indicates: the pattern information of the DMRS is first pattern information, and the transmission mode adopted by the terminal equipment is CG; the pattern information of the DMRS is second pattern information, and the transmission mode adopted by the terminal equipment is a two-step random access method. As another example, the configuration information indicates: the resource position of the DMRS is a first resource position, and the transmission mode adopted by the terminal equipment is CG; the resource position of the DMRS is a second resource position, and the transmission mode adopted by the terminal equipment is a two-step random access method. As another example, the configuration information indicates: the resource position of the PUSCH is a first resource position, and the transmission mode adopted by the terminal equipment is CG; the resource position of the PUSCH is a second resource position, and the transmission mode adopted by the terminal equipment is a two-step random access method.

Optionally, the configuration information may further include a correspondence between the PUSCH and the PRACH. Alternatively, the correspondence may be part of a 2-step RACH configuration.

For example, the network device may send, to the terminal device through an RRC message when the terminal device is in an RRC connected state, for example, when the terminal device performs RRC release, configuration information indicating a correspondence between a PUSCH and a PRACH, and two sets of patterns for a DMRS in the PUSCH, where each set includes at least one DMRS pattern. The first set of the transmission schemes is used for indicating that the terminal equipment sends PUSCH and does not send preamble on PRACH resources, namely the transmission scheme is CG; the second set indicates that the terminal equipment sends PUSCH in step 1 of the two-step random access method and sends preamble on PRACH resource, namely 2-step RACH scheme. For the terminal device, the terminal device in the RRC INACTIVE state may select the CG transmission scheme or the 2-step RACH scheme, and transmit the uplink packet on the configured resource. The network equipment detects the DMRS on the PUSCH and determines whether the DMRS in the first set or the DMRS in the second set according to the DMRS pattern. If the network equipment detects that the DMRS in the first set is detected, detecting no preamble on the corresponding PRACH; and if the detected DMRS in the second set is DMRS, detecting a preamble on the corresponding PRACH. If the network device does not detect the DMRS and/or does not detect the PUSCH, the network device considers that the terminal device may perform 4-step RACH and must detect preamble on PRACH.

It should be understood that the contents included in the configuration information are only described by way of example, and do not limit the embodiments of the present application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal, and interaction between the network device and the terminal. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

Fig. 10 is a schematic block diagram of an apparatus 1000 according to an embodiment of the present application. The apparatus includes a communication module 1010 and a processing module 1020. Optionally, the communication module 1010 includes a receiving module and/or a transmitting module.

The apparatus 1000 may be used to implement the functions of the terminal device in the above method. The device may be a terminal device, or may be a device that can be used in cooperation with the terminal device, for example, the device may be installed in the terminal device. In one possible design, the communication module 1010 may be the communication interface 1410 of fig. 11. In one possible design, processing module 1020 may be processor 1420 in FIG. 11.

Alternatively, the apparatus 1000 is configured to implement the functions of the network device in the foregoing method. The device may be a network device, or may be a device that can be used in cooperation with a network device, for example, the device may be installed in a network device. In one possible design, the communication module 1010 may be the communication interface 1510 of fig. 12. In one possible design, processing module 1020 may be processor 1520 of FIG. 12.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 11 shows an apparatus 1400 provided in this embodiment of the present application, configured to implement the functions of the terminal device in the foregoing method. The device may be a terminal device, or may be a device that can be used in cooperation with the terminal device, for example, the device may be installed in the terminal device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 1400 includes at least one processor 1420 configured to implement the functions of the terminal device in the methods provided in the embodiments of the present application. Illustratively, the processor 1420 may transmit a physical uplink shared channel, PUSCH, to the network device using the communication interface; and sending a Physical Random Access Channel (PRACH) to the network equipment, wherein the PUSCH related information of the PUSCH meets a first condition; or, the PRACH is not sent to the network device, where the PUSCH related information of the PUSCH satisfies a second condition, and so on, for which reference is specifically made to the detailed description in the method example, which is not described herein again.

Alternatively, the processor 1420 may transmit a physical uplink shared channel, PUSCH, to the network device using the communication interface;

when the PUSCH related information of the PUSCH meets a first condition, the transmission mode of the PUSCH is a two-step random access method, and the two-step random access method comprises the transmission of the PUSCH and a Physical Random Access Channel (PRACH);

and when the PUSCH related information of the PUSCH meets a second condition, the transmission mode of the PUSCH is a configuration authorization (CG) mode, and the CG mode comprises the transmission of the PUSCH.

The apparatus 1400 may also include at least one memory 1430 for storing program instructions and/or data. A memory 1430 is coupled to the processor 1420. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1420 may operate in conjunction with the memory 1430. Processor 1420 may execute program instructions stored in memory 1430. At least one of the at least one memory may be included in the processor

Apparatus 1400 may also include a communication interface 1410 for communicating with other devices over a transmission medium, such that the apparatus used in apparatus 1400 may communicate with other devices. In the embodiment of the present application, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin, or a device capable of implementing a transceiving function. Illustratively, the other device may be a network device. Processor 1420 utilizes communication interface 1410 to send and receive data and is configured to implement the methods performed by the terminal device described in the corresponding embodiments of fig. 2.

The specific connection medium between the communication interface 1410, the processor 1420 and the memory 1430 is not limited in this embodiment. In fig. 11, the memory 1430, the processor 1420 and the communication interface 1410 are connected by a bus 1440, the bus is shown by a thick line in fig. 11, and the connection manner between other components is only for illustrative purposes and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.

Fig. 12 shows an apparatus 1500 provided in this embodiment of the present application, configured to implement the functions of the network device in the foregoing method. The device may be a network device, or may be a device that can be used in cooperation with a network device, for example, the device may be installed in a network device. Wherein the apparatus may be a system-on-a-chip. The apparatus 1500 includes at least one processor 1520 configured to implement the functions of the network device in the methods provided by the embodiments of the application. For example, the processor 1520 may detect physical uplink shared channel, PUSCH, related information from the terminal device; in response to detecting the PUSCH related information, when the PUSCH related information satisfies a first condition, detecting a physical random access channel PRACH from the terminal device, and when the PUSCH related information satisfies a second condition, not detecting the PRACH from the terminal device, which refers to the detailed description in the method example specifically, and is not described herein again.

Alternatively, the processor 1520 may detect PUSCH related information of a physical uplink shared channel, PUSCH, from the terminal device;

The apparatus 1500 can also include at least one memory 1530 for storing program instructions and/or data. The memory 1530 and the processor 1520 are coupled. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1520 may operate in conjunction with the memory 1530. The processor 1520 may execute program instructions stored in the memory 1530. At least one of the at least one memory may be included in the processor

The apparatus 1500 may also include a communication interface 1510 for communicating with other devices over a transmission medium, such that the apparatus used in the apparatus 1500 may communicate with other devices. Illustratively, the other device may be a terminal. The processor 1520 utilizes the communication interface 1510 to transceive data and is configured to implement the method performed by the network device described in the corresponding embodiment of fig. 2.

The specific connection medium between the communication interface 1510, the processor 1520 and the memory 1530 is not limited in this embodiment. In the embodiment of the present application, the memory 1530, the processor 1520, and the communication interface 1510 are connected by the bus 1540 in fig. 12, the bus is represented by a thick line in fig. 12, and the connection manner between other components is only schematically illustrated and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The technical solutions provided in the embodiments of the present application may be wholly or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal device or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium, among others.

In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of communication, comprising:

sending a Physical Uplink Shared Channel (PUSCH) to network equipment; and the number of the first and second groups,

sending a Physical Random Access Channel (PRACH) to the network equipment, wherein the PUSCH related information of the PUSCH meets a first condition; or the like, or, alternatively,

not transmitting the PRACH to the network equipment, wherein the PUSCH related information satisfies a second condition.

2. The method of claim 1, further comprising:

according to one or more of the following: and determining to send the PRACH to the network equipment or not to send the PRACH to the network equipment according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell or not.

3. A method of communication, comprising:

sending a Physical Uplink Shared Channel (PUSCH) to network equipment;

4. The method of claim 3, further comprising:

according to one or more of the following: and determining the transmission mode of the PUSCH according to the time advance TA, the reference signal received power RSRP and the condition that whether the terminal equipment moves to the adjacent cell.

5. The method according to any one of claims 1 to 4, further comprising:

receiving configuration information from a network device, the configuration information indicating the first condition and the second condition.

6. The method according to any one of claims 1 to 5,

the PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information satisfies that a first condition comprises that pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies that a second condition comprises that the pattern information of the DMRS is second pattern information; alternatively, the first and second electrodes may be,

the PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information satisfies that a first condition comprises that the resource position of the DMRS is a first resource position, and the PUSCH related information satisfies that a second condition comprises that the resource position of the DMRS is a second resource position; alternatively, the first and second electrodes may be,

the PUSCH related information comprises the PUSCH, the PUSCH related information satisfies a first condition comprising that the resource position of the PUSCH is a first resource position, and the PUSCH related information satisfies a second condition comprising that the resource position of the PUSCH is a second resource position.

7. The method of claim 6, wherein the pattern information for the DMRS comprises one or more of the following parameters for the DMRS: sequence information, mapped time domain resource location, mapped frequency domain resource location, occupied symbol length, port number, cyclic shift.

8. A method of communication, comprising:

detecting PUSCH related information of a Physical Uplink Shared Channel (PUSCH) from a terminal device;

9. The method of claim 8, further comprising:

detecting a PRACH from the terminal device in response to not detecting the PUSCH-related information.

10. A method of communication, comprising:

in response to detecting the PUSCH-related information,

11. The method of claim 10, further comprising:

12. The method according to any one of claims 8 to 11, further comprising:

and sending configuration information to the terminal equipment, wherein the configuration information is used for indicating the first condition and the second condition.

13. The method according to any one of claims 8 to 12,

14. The method of claim 13, wherein the pattern information for the DMRS comprises one or more of the following parameters for the DMRS: sequence information, mapped time domain resource location, mapped frequency domain resource location, occupied symbol length, port number, cyclic shift.

15. An apparatus for carrying out the method of any one of claims 1 to 14.

16. An apparatus comprising a processor and a memory, the memory coupled with the processor, the processor to perform the method of any of claims 1 to 14.

17. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 14.