CN113473641B

CN113473641B - A communication method and a communication device

Info

Publication number: CN113473641B
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: 2024-11-19
Anticipated expiration: 2040-03-31
Also published as: WO2021197109A1; CN113473641A

Abstract

The embodiment of the application provides a communication method and a communication device, which enable network equipment to know a transmission mode adopted by terminal equipment by implicitly indicating the transmission mode adopted by the terminal equipment through PUSCH (physical uplink shared channel) related information. In this way, when the network device detects the PUSCH related information, the network device can learn the transmission mode adopted by the terminal device, so as to learn whether to detect the PRACH. When the network equipment acquires that the PUSCH related information meets the first condition, continuing to detect the PRACH; and when the PUSCH related information is known 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 demands, terminal devices in a communication scene gradually exhibit a large number of characteristics, 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 factory building; in home and living scenarios, there are a large number of cell phones, tablets, wearable devices, smart home appliances, or vehicle-mounted terminal devices, etc. The terminal device and the network device may perform uplink and/or downlink data transmission.

Disclosure of Invention

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

In a first aspect, a communication method is provided, including: the terminal equipment (or a chip or a processor in the terminal equipment) sends a Physical Uplink Shared Channel (PUSCH) to the network equipment; and transmitting 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 equipment, wherein the PUSCH related information meets a second condition.

In the method, the related 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 related information of the PUSCH meets the second condition, the network equipment does not need to detect the PRACH every time, and the detection times of the network equipment are reduced.

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

Optionally, the method further comprises: the terminal device is based on 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 receiving power RSRP and the condition of whether the terminal equipment moves to a neighbor cell. Therefore, the terminal device can select a proper transmission mode to transmit uplink data (such as an uplink packet) in combination with the above factors, which is helpful for selecting a more proper transmission mode in combination with the actual situation of the terminal device.

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

In a second aspect, a communication method is provided, including: the terminal equipment (or a chip or a processor in the terminal equipment) sends a Physical Uplink Shared Channel (PUSCH) to the network equipment; 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, wherein the two-step random access method comprises the step of transmitting 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 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, the network equipment does not need to detect the PRACH every time, and the detection times of the network equipment are reduced.

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 situation of whether the terminal equipment moves to a neighboring cell. That is, the terminal device may select CG mode to transmit the uplink packet, or select two-step random access method to transmit the uplink packet, or select four-step random access method to transmit the uplink packet, taking the above factors into consideration. Specific effects may be referred to the description in the first aspect.

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

In each implementation manner of the first aspect and the second aspect, the PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition including that pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies a second condition including that pattern information of the DMRS is second pattern information; or the PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition including that a resource location of the DMRS is a first resource location, and the PUSCH related information satisfies a second condition including that the resource location of the DMRS is a second resource location; 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 cases in which the content of the PUSCH-related information may be included in the present application, and the PUSCH-related information satisfies the corresponding condition in each case, that is, the content of the PUSCH-related information is relatively diversified.

Optionally, the pattern information of the DMRS includes one or more of the following parameters of the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts. Therefore, the application can distinguish the pattern information of different DMRS through one or more of the parameters, and the implementation mode is flexible.

In a third aspect, a communication method is provided, including: the network equipment (or a chip or a processor in the network equipment) detects the PUSCH related information of the physical uplink shared channel from the terminal equipment; 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 PRACH from the terminal device when the PUSCH-related information satisfies a second condition. Here, when the network device knows that the PUSCH related information satisfies the first condition, the network device continues to detect the PRACH; and when the PUSCH related information is known 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, so as to help to demodulate the PUSCH more accurately 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 PRACH, a four-step random access method is performed.

In a fourth aspect, a communication method is provided, including: the network equipment (or a chip or a processor in the network equipment) detects the PUSCH related information of the physical uplink shared channel from the terminal equipment; in response to detecting the PUSCH related information, when the PUSCH related information meets a first condition, the PUSCH transmission mode is a two-step random access method, and the two-step random access method comprises transmitting 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 transmission of the PUSCH. Here, when the network device knows that the PUSCH related information satisfies the first condition, the network device continues to detect the PRACH; and when the PUSCH related information is known 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 third or fourth aspect, the method further includes: 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. That is, the network device may pre-configure specific contents of the first condition and the second condition for the terminal device.

In each implementation manner of the third aspect and the fourth aspect, the PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition including that pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies a second condition including that pattern information of the DMRS is second pattern information; or the PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition including that a resource location of the DMRS is a first resource location, and the PUSCH related information satisfies a second condition including that the resource location of the DMRS is a second resource location; 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. For specific technical effects reference may be made to the description on the terminal device side.

Optionally, the pattern information of the DMRS includes one or more of the following parameters of the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts. For specific technical effects reference may be made to the description on the terminal device side.

In a fifth aspect, an apparatus is provided, where the apparatus may be a terminal device, an apparatus in a terminal device, or an apparatus that can be used in a matching manner with a terminal device. In one design, the apparatus may include modules corresponding to each other for performing the methods/operations/steps/actions described in the first aspect or the second aspect, where the modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the apparatus may include a processing module and a communication module. Optionally, the communication module comprises a transmitting module and/or a receiving module.

An exemplary sending module is configured to send, by a network device, a physical uplink shared channel PUSCH; and transmitting 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 equipment, wherein the PUSCH related information meets 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 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 receiving power RSRP and the condition of whether the terminal equipment moves to a neighbor cell.

An exemplary sending module is configured to send, by a 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, wherein the two-step random access method comprises the step of transmitting 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 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 situation of whether the terminal equipment moves to a neighboring cell.

In a 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 one possible design, the specific content and the satisfied conditions included in the PUSCH related information may be referred to in the foregoing detailed description, which is not specifically limited herein.

In a sixth aspect, an apparatus is provided, where the apparatus may be a network device, an apparatus in a network device, or an apparatus that can be used in cooperation with a network device. In one design, the apparatus may include modules corresponding to the methods/operations/steps/actions described in the third or fourth aspect, where the modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the apparatus may include a processing module and a communication module. Optionally, the communication module comprises a transmitting module and/or a receiving module.

An exemplary receiving module, 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, a physical random access channel, PRACH, is detected from the terminal device when the PUSCH-related information satisfies a first condition, and the PRACH is not detected from the terminal device when the PUSCH-related information satisfies a second condition.

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

The processing 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, when the PUSCH related information meets a first condition, the PUSCH transmission mode is a two-step random access method, and the two-step random access method comprises transmitting 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 transmission of the PUSCH.

In a 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 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 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, which may be transceivers, circuits, buses, modules, pins, or other types of communication interfaces, as examples, and other devices may be network devices. In one possible apparatus, the device 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

Transmitting a physical random access channel PRACH to the network equipment, wherein the PUSCH related information meets a first condition; or alternatively, the first and second heat exchangers may be,

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

In one possible design, the processor is further configured to perform 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 receiving power RSRP and the condition of whether the terminal equipment moves to a neighbor cell.

Or the processor is used for sending a Physical Uplink Shared Channel (PUSCH) to the network equipment by utilizing the communication interface;

When the PUSCH related information meets a first condition, the transmission mode of the PUSCH is a two-step random access method, wherein the two-step random access method comprises the step of transmitting 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 transmission of the PUSCH.

In one possible design, the processor is further configured to perform 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 situation of whether the terminal equipment moves to a neighboring cell.

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

In an eighth aspect, an embodiment of the present application provides an apparatus, including a processor, configured to implement the method described in the third or fourth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, which when executing instructions stored in the memory, may implement the method described in the third or fourth aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, which may be transceivers, circuits, buses, modules, pins, or other types of communication interfaces, as examples, and the other devices may be terminal devices. In one possible apparatus, the device comprises:

a memory for storing program instructions;

A processor, configured to detect information related to a physical uplink shared channel PUSCH from a terminal device; in response to detecting the PUSCH-related information, a physical random access channel, PRACH, is detected from the terminal device when the PUSCH-related information satisfies a first condition, and the PRACH is not detected from the terminal device when the PUSCH-related information satisfies a second condition.

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

in response to detecting the PUSCH related information, when the PUSCH related information meets a first condition, the PUSCH transmission mode is a two-step random access method, and the two-step random access method comprises transmitting 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 transmission of the PUSCH.

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

In an eighth aspect, optionally, the processor sends configuration information to the terminal device using the communication interface, the configuration information being used to indicate the first condition and the second condition.

In a ninth aspect, embodiments of the present application also provide a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of the first or second aspect.

In a tenth aspect, embodiments of the present application also provide a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of the third or 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, where the processor is configured to implement a function of a network device in the foregoing method. The chip system may be formed of a chip or may 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, where the processor is configured to implement a function of a terminal device in the foregoing method. The chip system may be formed of a chip or may 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, there is also provided in an embodiment of the application a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first, second, third or fourth aspect.

Drawings

Fig. 1 is an architecture example diagram 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 application;

FIG. 3 is an exemplary diagram of a communication method to which embodiments of the present application are applied;

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

Fig. 5 is another exemplary diagram of a pattern of reference signals of DMRS type 1;

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

Fig. 7 is another exemplary diagram of a pattern of reference signals of DMRS type 2;

FIG. 8 is a schematic diagram of another example of a communication method to which an embodiment of the present application is applied;

FIG. 9 is a schematic diagram of still another example of a communication method to which an embodiment of the present application is applied;

FIG. 10 is a schematic block diagram of a communication device to which embodiments of the present application are applied;

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

fig. 12 is another schematic structural diagram of a communication apparatus to which an 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, such as: long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), fifth generation (5th generation,5G) systems, future introduced communication systems, or fusion of multiple communication systems, etc. Wherein 5G may also be referred to as New Radio (NR).

In a wireless communication system including communication devices, communication devices can perform wireless communication by 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 space resources. In the embodiment 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, and the present application is not limited thereto.

In embodiments of the present application, "/" may indicate that the associated object is an "or" relationship, e.g., A/B may represent A or B; "and/or" may be used to describe that there are three relationships associated with an object, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In order to facilitate description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. may be used to distinguish between technical features that are the same or similar in function. The terms "first," "second," and the like do not necessarily denote any order of quantity or order of execution, nor do the terms "first," "second," and the like. In embodiments of the application, the words "exemplary" or "such as" are used to mean examples, illustrations, or descriptions, and any embodiment or design described as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. The use of the word "exemplary" or "such as" is intended to present the relevant concepts in a concrete fashion to facilitate understanding.

The terminal device related to the embodiment of the application can also be called a terminal, can be a device with a wireless receiving and transmitting function, and can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a User Equipment (UE), wherein the UE includes a handheld device, an in-vehicle device, a wearable device, or a computing device with wireless communication capabilities. The UE may be a mobile phone (mobile phone), a tablet computer, or a computer with a wireless transceiver function, for example. The terminal device may also be a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned, 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), etc. In the embodiment of the present application, the device for implementing the function of the terminal may be a terminal device; or may be a device, such as a chip system, capable of supporting the terminal to perform the function, which may be installed in the terminal. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal is a terminal device, which is described in the technical solution provided in the embodiment of the present application.

The network device according 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. Among them, the base station may have various forms such as macro base station, micro base station, relay station, access point, etc. The base station involved in the embodiment of the present application may be a base station in a 5G system or a base station in LTE, for example. Among other things, a base station in a 5G system may also be referred to as a transmission reception point (transmission reception point, TRP) or 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 constituting a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the network equipment. In some deployments, the gNB may include a Central Unit (CU) and a DU, each implementing part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer. The DU is responsible for handling physical layer protocols and real-time services, and implements functions of a radio link control (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 (ACTIVE ANTENNA units, AAU). The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may be eventually changed into or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is 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 be used as a network device in an access network, or may be used as a network device in a Core Network (CN), which is not limited by the present application. In the embodiment of the present application, the device for implementing the function of the network device may be a network device; or may be a device, such as a system-on-a-chip, capable of supporting the network device to perform this function, which may be installed in the network device. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the network device is exemplified by the 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 equipment. 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 a scheduling entity (such as network equipment) and a subordinate entity (such as terminal equipment). Wherein the scheduling entity may allocate resources for the subordinate entity. A person skilled in the art may use the technical solution provided by the embodiment 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 an architecture example diagram 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. A core network device 110 may also be included in the mobile communication system. The wireless access network device is connected with the core network device in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device may be fixed in position or may be movable. Fig. 1 is only an exemplary diagram, and other network devices may be further included in the communication system, such as a wireless relay device and a wireless backhaul device, which are not shown in fig. 1. The embodiment of the application does not limit the number of the core network equipment, the radio access network equipment and the terminal equipment included in the mobile communication system.

In the embodiment of the present application, if not specifically described, the network devices refer to 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) SHARED CHANNEL. For convenience of description, the PUSCH is only used as an example for the following description. The uplink data channel may have different names in different systems, and the specific name of the channel is not limited in the embodiments of the present application.

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

(1) Configuration authorization (configured grant, CG)

And the terminal equipment uses uplink transmission resources pre-configured by the network equipment or uplink transmission resources indicated by the network equipment for the terminal equipment through high-layer signaling, and sends uplink packet data to the network equipment through the PUSCH. The higher layer signaling may be RRC signaling or a MAC Control Element (CE), and the content of the configuration mainly includes one or more of the following parameters of PUSCH: time domain resources, frequency domain resources, demodulation reference signals (demodulation REFERENCE SIGNAL, DMRS), number of repeated transmissions, modulation coding scheme, redundancy version, number of hybrid automatic repeat request (hybrid automatic repeat request, HARQ) processes, etc. For example, the packet data is a packet with a Transport Block (TB) size of less than 100 bytes (byte), or a completed packet can be transmitted in one slot (slot). Optionally, the terminal device may also send a terminal Identifier (ID) to the network device. The CG resources configured by the network device in the terminal RRC connected state mainly include PUSCH resources and DMRS resources of PUSCH. CG resources used by a terminal device may be shared by multiple terminals or may be dedicated to one terminal. In the embodiment of the present application, the uplink packet data may also be referred to as an uplink packet (SMALL DATA).

The technical scheme provided by the embodiment of the application not only can be used for transmitting the uplink small packet, but also can be used for transmitting data packets with other sizes, such as data packets with a TB size greater than 100byte or data packets which can be transmitted in a plurality of slots, and the embodiment of the application is not limited.

(2) 2-Step random Access channel (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, also referred to as a preamble (or preamble sequence), is a sequence that can be used by the network device to determine the time advance (TIMING ADVANCE, TA) of the terminal device.

Step2, the network device sends a random access response (random access response, RAR) to the terminal device through a message B (Msg B). The RAR includes feedback information to inform the terminal device whether the uplink packet is received.

The different TA values of the terminal devices are generated by different distances of the terminal devices from the network device. The TA of the terminal device is typically determined by the network device through the detection of a preamble.

(3) 4-Step random Access channel (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. The scheme of transmitting packets over the 4-step RACH is also known as the data early transmission scheme (EARLY DATA transmission, EDT). The 4-step RACH scheme includes 4 steps:

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

Step 2, the network device sends an 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 (physical downlink SHARED CHANNEL, PDSCH).

And step 3, the terminal equipment sends the uplink small packet to the network equipment through the Msg3 on the RAR scheduled resource. Alternatively, 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 (message 4, msg 4) to inform the terminal equipment whether the uplink small 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 by the network device to the terminal device when the terminal RRC is in a connected state, and/or configured by the network device to the terminal 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 be transitioned in the following states: an RRC IDLE (rrc_idle) state, an rrc_connected state, and an RRC INACTIVE (rrc_inactive) state.

In one possible implementation, the data transmission between the network device and the terminal device is performed when the terminal device is in an RRC connected state. In some scenarios, only small packets are transmitted between the network device and the terminal device over a longer time frame. After the packet transmission is completed, from the viewpoint of energy saving, the terminal device is not required to be in the rrc_connected state for a long time. Thus, in another possible implementation, the terminal device may send the uplink packet to the network device in rrc_inactive state, which may save signaling overhead, and terminal device power consumption. The terminal device is in rrc_inactive state, where the network device may retain core network registration information of the terminal device, but the terminal device suspends most of the air interface actions with the network device, such as suspending monitoring of scheduling information (i.e. receiving a PDCCH scheduling unicast transmissions of the UE, the PDCCH being the UE-specific PDCCH), sending scheduling requests, radio resource management (radio resource management, RRM) measurements, beam maintenance, etc. The rrc_inactive state is a state in which the terminal is power-saving.

For the uplink packet transmission in 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 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 is necessary to detect whether the terminal device has transmitted information on all uplink resources, resulting in higher complexity of detection 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 will be appreciated 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), or may refer to a device in the terminal device (e.g., a processor, a chip, or a chip system, etc.). The network device may be the radio access network device 120 in fig. 1, or may refer to a device (e.g., a processor, a chip, or a system-on-chip, etc.) in the radio access network device. It is further understood that part or all of the information interacted between the terminal device and the network device in fig. 2 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 in particular. As shown in fig. 2, the method 200 includes:

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

Optionally, the terminal device sends the DMRS of the PUSCH to the network device. The DMRS may be located in a resource allocated for PUSCH.

The communication method according to the embodiment of the application is applicable to uplink data transmission. Illustratively, the transmission of the uplink data may include transmission of an uplink packet, but embodiments of the present application are not limited thereto.

Taking uplink data as an uplink packet as an example for description, if the terminal device adopts a CG transmission mode or a two-step random access method to send the uplink packet, step 1 of the two-step random access method needs to send PUSCH to the network device, where the PUSCH is used for carrying the uplink packet. Or the terminal equipment can also transmit the uplink small packet by adopting a four-step random access method. If the terminal device adopts the four-step random access method to send the uplink packet, the terminal device does not send 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 execute step S201), and sends the PRACH in step 1 of the four-step random access method.

The CG transmission method, the two-step random access method, and the four-step random access method may be explained with reference to the foregoing description, and will not be described herein.

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

The network device may or may not detect PUSCH-related information. If the network device detects the PUSCH related information, deciding whether to continue to detect the PRACH based on the condition satisfied by the PUSCH related information.

S203, the terminal equipment sends 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 PUSCH transmission mode 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 PUSCH but also 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 transmission of the PUSCH. That is, the terminal device transmits PUSCH to the network device without transmitting PRACH.

S204, 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.

That is, the PUSCH related information indicates a transmission scheme adopted by the terminal device. For the network device, when the network device detects the PUSCH related information, the network device may learn the transmission mode adopted by the terminal device, so as to learn whether to detect the PRACH. Specifically, when the network equipment knows that the PUSCH related information meets the first condition, the network equipment continues to detect the PRACH; and when the PUSCH related information is known 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. In addition, if the PRACH is used in competition by a plurality of terminal devices, the network device is also helped to determine whether a certain terminal device sends the preamble on the PRACH, so that the complexity of detecting the preamble can be reduced, and the accuracy of detecting 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.

Alternatively, the network device may not detect PUSCH related information. Optionally, the method 200 further includes: s205, in response to not detecting PUSCH related information, the network device detects PRACH from the terminal device.

If the network device does not detect PUSCH related information (e.g., the DMRS is not detected on PUSCH), the network device considers that the terminal device may employ a four-step random access method and then detect on PRACH. Here, if the network device detects 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, then 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 one

The PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, and the PUSCH related information satisfies a first condition includes: the pattern information of the DMRS is first pattern information, and the PUSCH related information satisfies the second condition includes: 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, whether the terminal device transmits a preamble on the PRACH is implicitly indicated here by the DMRS pattern. The first pattern information indicates that the terminal equipment transmits the PUSCH and does not transmit the preamble on the PRACH, i.e., the terminal equipment adopts the CG transmission mode. The second pattern information indicates that the terminal device sends PUSCH in step 1 of the two-step random access method, and sends preamble on PRACH, i.e. 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.

Describing 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, where the PUSCH carries a first DMRS; if the terminal equipment adopts the two-step random access method, the PUSCH is sent in the step 1 of the two-step random access method, the PUSCH carries the second DMRS, and the preamble is sent 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 may be distinguished from the pattern information of the second DMRS by various means provided below. If the terminal equipment adopts the four-step random access method, the PUSCH is not transmitted in the step 1 of the four-step random access method, and the preamble is transmitted 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 locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts.

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 pattern information of the DMRS is distinguished by the information of the sequence of the DMRS, the distinction may be performed by calculation of the sequence or by the length of the sequence, which is not limited thereto.

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

Mapped frequency domain resource locations: the physical layer frequency domain resource locations of the sequences of DMRS in the transmission slots, such as occupied subcarrier locations, resource Block (RB) locations.

Cyclic shift: the elements of the sequence of the DMRS are shifted by the same number of bits in a left shift or right shift manner, and the part vacated at one end after shifting is sequentially supplemented by the part shifted out at the other end. Information may be carried by the number of shifts.

Occupied symbol length: for example, the DMRS occupies 1 symbol or 2 symbols, or other numbers of symbols. For example, the difference between the first pattern information and the second pattern information may be expressed as: the occupied symbol lengths are different.

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

The related concepts differentiated by DMRS port numbers are explained below. It will be appreciated that the following description of the DMRS port division and the DMRS pattern illustrated in the drawings are merely for ease of understanding, and do not limit the embodiments of the present application. In fact, there may be other schemes for partitioning the DMRS ports, or other examples of DMRS patterns.

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

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

For example, referring to fig. 4, for DMRS of one (single) preamble symbol (corresponding to an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol numbered 2, horizontal axis in the figure), subcarriers of the OFDM symbol (vertical axis in the figure) are divided into two groups, that is, subcarriers of the OFDM symbol are divided into two DMRS CDM groups, each DMRS CDM group corresponds to 2 DMRS ports where a single OFDM symbol is multiplexed by OCC. Referring to fig. 4, DMRS CDM group 0 corresponds to DMRS Resource Element (RE) of antenna port 0/1, DMRS CDM group 1 corresponds to DMRS REs of antenna port 2/3, i.e., 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 DMRS 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, subcarriers of the OFDM symbol are divided into two DMRS CDM groups, each DMRS CDM group corresponding to 4 DMRS ports where dual OFDM symbols are multiplexed by OCC. Referring to the DMRS REs of antenna ports 0/1/4/5 for DMRS CDM group 0, 2/3/6/7 for DMRS CDM group 1, i.e., DMRS CDM group 0, 1, 4 and 5 for DMRS ports, 1,2, 3,6 and 7 for 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, subcarriers of the OFDM symbol are divided into three DMRS CDM groups, each DMRS CDM group corresponds to 2 DMRS ports to which a single OFDM symbol is multiplexed by an OCC scheme. Referring to fig. 6, DMRS CDM group 0 corresponds to DMRS REs of antenna port 0/1, DMRS CDM group 1 corresponds to DMRS REs of antenna port 2/3, DMRS CDM group 2 corresponds to DMRS REs of antenna port 4/5, i.e., DMRS CDM group 0 corresponds to DMRS port 0 and DMRS port 1, DMRS CDM group 1 corresponds to DMRS port 2 and DMRS port 3, and DMRS CDM group 2 corresponds to DMRS port 4 and DMRS port 5.

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

DMRS type 1 may be used only if transform precoding (transform precoding) is enabled, i.e., when a discrete fourier spread orthogonal frequency division multiplexing (discrete Fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM) waveform is used upstream, 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 (cyclic prefix orthogonal frequency division multiplexing, CP-OFDM) waveform is used.

A related description of DMRS configuration will be presented 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 denotes DMRS type 1, configuration type denotes DMRS type 2, k is frequency domain position, l is time domain position, Δ is frequency domain offset, w _f (k ') and w _t (l') denote OCC of frequency domain and time domain respectively, Represents the intermediate quantity before precoding and physical resource mapping operations, j represents the PUSCH layer index, v represents the PUSCH total number of layers, r (2n+k ') represents the DMRS sequence, and the values of k ', l ' refer to the following tables 1 and 2.

Parameters of each DMRS port in DMRS type 1 or DMRS type 2 can be determined through the following table 1 (corresponding to DMRS type 1) and table 2 (corresponding to DMRS type 2), and further, the resource of each DMRS port is determined according to the above-mentioned resource mapping formula of DMRS.

Table 1:Parameters for PUSCH DM-RS configuration type (parameters of DMRS type 1 of PUSCH)

Table 2:Parameters for PUSCH DM-RS configuration type (parameters of DMRS type 2 of PUSCH)

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

Table 3 antenna port(s), transform precoder is disabled, DMRS-type=1, maxlength=2, rank=4 (antenna port, forbidden transition precoding (CP-OFDM waveform), DMRS type=1, DMRS time domain maximum length=2, number of channels=4)

Implementation II

The PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition including that a resource location of the DMRS is a first resource location, and the PUSCH related information satisfies a second condition including that a resource location of the DMRS is a second resource location.

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 is different from the second resource location in the time domain and/or the first resource location is different from the second resource location in the frequency domain.

For the network device, if the network device detects that the terminal device transmits the DMRS at the first resource location, the network device considers that the terminal device selects the CG transmission mode, and the network device no longer detects the PRACH. If the network device detects that the terminal device transmits the DMRS at the second resource location, the network device considers that the terminal device selects the two-step random access method, and the network device needs to detect the preamble on the PRACH.

Describing the example in fig. 8 as an example, as shown in fig. 8, if the terminal device adopts a CG transmission mode, the DMRS is transmitted on DMRS position 1 through PUSCH; if the terminal device adopts a two-step random access method, the DMRS is sent at DMRS position 2 through PUSCH and the preamble is sent on 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 device adopts the four-step random access method, the terminal device 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 at the DMRS position 1, the terminal equipment is considered to select a CG transmission mode, and the PRACH is not detected; if the network equipment detects that the DMRS is at the DMRS position 2, the terminal equipment is considered to select a two-step random access method, and PRACH is detected; if the network equipment does not detect the PUSCH, the terminal equipment is considered to select a four-step random access method, and the PRACH is detected.

Implementation III

The PUSCH related information includes the PUSCH, the PUSCH related information satisfying a first condition includes the resource location of the PUSCH being a first resource location, and the PUSCH related information satisfying a second condition includes the resource location of the PUSCH being a second resource location.

It can be appreciated that the first resource location and the second resource location of the third implementation are for PUSCH, the first resource location and the second resource location of the second implementation are for DMRS, i.e., the first resource location and the second resource location of the third implementation, and the first resource location and the second resource location of the second implementation may not be related.

For the network device, if the network device detects that the terminal device sends the PUSCH at the first resource location, the network device considers that the terminal device selects the CG transmission mode, and the network device no longer detects the PRACH. If the network device detects that the terminal device sends the PUSCH at the second resource location, the network device considers that the terminal device selects the two-step random access method, and the network device needs to detect the preamble on the PRACH.

Describing the example in fig. 9 as an example, as shown in fig. 9, if the terminal device adopts CG transmission mode, PUSCH is transmitted at PUSCH position 1; if the terminal equipment adopts a two-step random access method, the PUSCH is sent at the PUSCH position 2, and the preamble is sent on the PRACH. PUSCH position 1 and PUSCH position 2 are different, e.g. PUSCH position 1 has a starting time domain position earlier than PUSCH position 2. If the terminal device adopts the four-step random access method, the terminal device 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 terminal equipment considers that the CG transmission mode is selected, and the PRACH is not detected; if the network equipment detects that the PUSCH is at the PUSCH position 2, the terminal equipment is considered to select a two-step random access method, and the PRACH is detected; if the network equipment does not detect the PUSCH, the terminal equipment is considered to select a four-step random access method, and the PRACH is detected.

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

In the embodiment of the present application, the terminal device selects which transmission mode (one selected from CG, two-step random access method or four-step random access method, or one selected from CG and two-step random access method, or one selected from CG and four-step random access method) may consider some factors. Optionally, the method 200 further includes: the terminal device is based on one or more of the following: the time advance TA, the reference signal received power (REFERENCE SIGNAL RECEIVING power, RSRP), and whether the terminal device moves to a neighbor cell, determines to transmit PRACH to a network device or not.

As an implementation, the terminal device decides which transmission mode to select according to whether the TA value is valid. For example, if the terminal device determines that the TA value is valid, selecting CG transmission mode, i.e. sending PUSCH to the network device, and not sending PRACH; if the terminal equipment judges that the TA value is invalid, a two-step random access method is selected, namely, the PUSCH is sent to the network equipment, and the 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. Alternatively, the terminal device may determine whether the TA value is valid by whether the timer has expired and moved to the neighbor cell. The timing at which the timer starts to operate is not particularly limited here. For example, the terminal device starts timing from entering RRC INACTIVE state. For another example, the terminal device starts timing after obtaining configuration information sent by the network device, the configuration information indicating the first condition and the second condition (which will be described in detail below in S206).

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

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

The method for acquiring the first threshold and/or the second threshold is not limited, and may be defined by a protocol, or may be configured or indicated by a network device to a terminal device.

As an implementation manner, the terminal device decides which transmission mode is selected 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, i.e. sending PUSCH to the network device of the neighboring cell, and sending PRACH to the network device of the neighboring cell, or the terminal device selects a four-step random access method, i.e. sending PRACH to the network device of the neighboring cell, and does not send 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 a PUSCH to the network equipment of the adjacent cell and does not send the PRACH.

The manner of determining whether to move to the neighboring cell is not limited here. Illustratively, the terminal device may determine whether it has moved to a neighboring Cell based on detecting a Cell identity (e.g., cell ID) indicated by a synchronization signal in a synchronization signal block (synchronization signal block, SSB).

In the embodiment of the present application, the relationship between the conditions satisfied by the PUSCH related information and the corresponding transmission mode may be defined by a protocol, that is, the relationship between the terminal device and the network device may be known in advance. Or the relation between the condition satisfied by the PUSCH related information and the corresponding transmission mode may be configured by the network device to the terminal device through broadcasting system information or RRC signaling, which is not limited.

Optionally, the method 200 further includes: 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. The network device may transmit the configuration information to the terminal device through system information, RRC message, MAC CE, or DCI signaling, for example.

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

For example, the network device may indicate, in the configuration information, a correspondence between a condition satisfied by the PUSCH related information and a transmission manner. 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. For 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 the second resource position, and the transmission mode adopted by the terminal equipment is a two-step random access method. For 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 the 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 PUSCH and PRACH. Alternatively, the correspondence may be part of a 2-step RACH configuration.

For example, when the terminal device is in RRC connected state, for example, RRC RELEASE, the network device may send configuration information to the terminal device through an RRC message, where the configuration information indicates a correspondence between PUSCH and PRACH, and two sets of patterns for DMRS in PUSCH, each set including at least one DMRS PATTERN. The first set of the terminal equipment sends the PUSCH, and does not send the preamble on the PRACH resource, namely the CG transmission scheme; 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 resources, namely a 2-step RACH scheme. For the terminal device, the terminal device in RRC INACTIVE state may select CG transmission scheme or 2-step RACH scheme, and send uplink packet on the configured resource. The network device detects the DMRS on PUSCH and determines whether to use the DMRS in the first set or the DMRS in the second set according to DMRS PATTERN. If the network device detects the DMRS in the first set, detecting a preamble on the corresponding PRACH; if DMRS in the second set is detected, a preamble is detected on the corresponding PRACH. If the network device does not detect DMRS and/or PUSCH, the network device considers that the terminal device may be performing 4-step RACH and must detect preamble on PRACH.

It should be understood that the content included in the configuration information is only described by way of example, and is not limiting on the embodiments of the present application.

In the embodiments of the present application, the method provided in the embodiments of the present application is described in terms of the network device, the terminal, and the interaction between the network device and the terminal, respectively. In order to implement the functions in the method provided by the embodiment of the present application, the network device and the terminal may include hardware structures and/or software modules, and implement the functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

Fig. 10 is a schematic block diagram of an apparatus 1000 in accordance with 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 a terminal device, for example, the device may be installed in the terminal device. In one possible design, communication module 1010 may be communication interface 1410 of FIG. 11. In one possible design, processing module 1020 may be processor 1420 of FIG. 11.

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

The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

Fig. 11 shows an apparatus 1400 provided in an embodiment of the present application, which is configured 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 a terminal device, for example, the device may be installed in the terminal device. Wherein the device may be a system-on-chip. In the embodiment of the application, the chip system can be formed by a chip, and can also comprise the chip and other discrete devices. The apparatus 1400 includes at least one processor 1420 configured to implement functions of a terminal device in a method provided by an embodiment 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 transmitting 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 PUSCH related information of the PUSCH satisfies a second condition, and so on, specifically referring to the detailed description in the method example, which is not described herein in detail.

Or the processor 1420 may send 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, wherein the two-step random access method comprises the step of transmitting the PUSCH and a physical random access channel PRACH;

When the PUSCH related information of the PUSCH satisfies a second condition, the PUSCH transmission mode is a configuration grant CG mode, where the CG mode includes transmitting the PUSCH.

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

The apparatus 1400 may also include a communication interface 1410 for communicating with other devices over a transmission medium, such that an apparatus used in the apparatus 1400 may communicate with other devices. In the embodiment of the application, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin or a device capable of realizing a transceiving function. The other device may be a network device, for example. The processor 1420 receives and transmits data using the communication interface 1410 and is used to implement the method performed by the terminal device described in the corresponding embodiment of fig. 2.

The specific connection medium between the communication interface 1410, the processor 1420, and the memory 1430 is not limited in the embodiment of the application. In the embodiment of the present application, the memory 1430, the processor 1420 and the communication interface 1410 are connected through a bus 1440 in fig. 11, the bus is shown by a thick line in fig. 11, and the connection manner between other components is only schematically illustrated and is not limited thereto. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in FIG. 11, but not only one bus or one type of bus.

Fig. 12 shows an apparatus 1500 according to an embodiment of the present application, which is configured to implement the functions of the network device in the above method. The apparatus may be a network device, or may be an apparatus that can be used in cooperation with a network device, for example, the apparatus may be installed in a network device. Wherein the device may be a system-on-chip. The apparatus 1500 includes at least one processor 1520 for implementing the functions of the network device in the method provided by the embodiment of the application. Illustratively, 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, with specific reference to detailed description in a method example, which is not repeated herein.

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

The apparatus 1500 may also include at least one memory 1530 for storing program instructions and/or data. Memory 1530 is coupled to processor 1520. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 1520 may operate in conjunction with memory 1530. Processor 1520 may execute program instructions stored in 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 an apparatus for use in the apparatus 1500 may communicate with other devices. The other device may be a terminal, for example. The processor 1520 receives and transmits data using the communication interface 1510 and is configured to implement the method performed by the network device as 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 to the specific connection medium described above in the embodiments of the present application. The connection between the memory 1530, the processor 1520, and the communication interface 1510 in fig. 12 is shown by a bus 1540, which is shown in bold lines in fig. 12, and the connection between other components is merely illustrative, and not limiting. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 12, but not only one bus or one type of bus.

In the embodiment 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. The 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 embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a hard disk (HARD DISK DRIVE, HDD) or a solid-state disk (SSD), or may be a volatile 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 embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.

The technical scheme provided by the embodiment of the application can be realized completely or partially 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, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a terminal device, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more 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 disc (digital video disc, DVD)), or a semiconductor medium, etc.

In the embodiments of the present application, where there is no logical conflict, embodiments may be referred to each other, for example, methods and/or terms between method embodiments may be referred to each other, for example, functions and/or terms between apparatus embodiments and method embodiments may be referred to each other.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of communication, comprising:

transmitting a Physical Uplink Shared Channel (PUSCH) to the network equipment; and

Transmitting a physical random access channel PRACH to the network equipment, wherein PUSCH related information of the PUSCH meets a first condition; or alternatively, the first and second heat exchangers may be,

2. The method according to claim 1, wherein the method further comprises:

According to one or more of the following: the method comprises the steps of determining whether to send PRACH to the network equipment or not according to time advance TA, reference signal receiving power RSRP and whether the terminal equipment moves to a neighbor cell.

3. The method according to claim 1, wherein the method further comprises:

Configuration information is received from a network device, the configuration information being indicative of the first condition and the second condition.

4. A method according to any one of claim 1 to 3, wherein,

The PUSCH related information includes a demodulation reference signal DMRS of the PUSCH, the PUSCH related information satisfies a first condition and includes pattern information of the DMRS as first pattern information, and the PUSCH related information satisfies a second condition and includes pattern information of the DMRS as second pattern information; or alternatively

The PUSCH related information comprises a demodulation reference signal (DMRS) of the PUSCH, the PUSCH related information meets a first condition and comprises a first resource position of the DMRS, and the PUSCH related information meets a second condition and comprises a second resource position of the DMRS; or alternatively

The PUSCH related information includes the PUSCH, the PUSCH related information satisfying a first condition includes that a 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.

5. The method of claim 4, wherein the pattern information for the DMRS comprises one or more of the following parameters for the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts.

6. A method of communication, comprising:

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

7. The method of claim 6, wherein 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 situation of whether the terminal equipment moves to the adjacent cell.

8. The method of claim 6, wherein the method further comprises:

9. The method according to any one of claims 6 to 8, wherein,

10. The method of claim 9, wherein the pattern information of the DMRS comprises one or more of the following parameters of the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts.

11. A method of communication, comprising:

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

12. The method of claim 11, wherein the method further comprises:

And detecting PRACH from the terminal equipment in response to not detecting the PUSCH related information.

13. The method of claim 11, wherein the method further comprises:

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

14. The method according to any one of claims 11 to 13, wherein,

15. The method of claim 14, wherein the pattern information of the DMRS comprises one or more of the following parameters of the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts.

16. A method of communication, comprising:

in response to detecting the PUSCH related information,

17. The method of claim 16, wherein the method further comprises:

18. The method of claim 16, wherein the method further comprises:

19. The method according to any one of claims 16 to 18, wherein,

20. The method of claim 19, wherein the pattern information for the DMRS comprises one or more of the following parameters for the DMRS: sequence information, mapped time domain resource locations, mapped frequency domain resource locations, occupied symbol lengths, port numbers, cyclic shifts.

21. An apparatus comprising means for implementing the method of any one of claims 1 to 20.

22. An apparatus comprising a processor and a memory coupled to the processor for performing the method of any of claims 1-20.

23. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 20.