Random access method and random access apparatus

Abstract

Provided in the present application are a random access method and a random access apparatus. The method comprises: when a random access request sent by a terminal device to a primary network node has been detected by a secondary network node, the secondary network node informing the primary network node of a detection result; and the primary network node sending to the terminal device a set of data transmission resources associated with a physical beam of the secondary network node. By means of the random access method provided in the embodiments of the present application, not only can the random access probability of the terminal device be improved, but the random access probability of other terminal devices which request random access to the primary network node can also be improved.

Description

Random access method and random access device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 29, 2024, with application number 202410128457.4 and application name “Random Access Method and Random Access Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more specifically, to a random access method and a random access device. Background Art

[0003] When a terminal device in an idle state (idle state or idle mode) or an inactive state (inactive state or inactive mode) needs to transmit data to a network device, the terminal device needs to perform random access to enter a connected state (connected state or connected mode) or an active state (active state or active mode) before it can transmit data to the network device. When performing random access, the terminal device selects a physical random access channel (PRACH) and a random access preamble from the physical random access channel (PRACH) resource pool and random access preamble resource pool configured by the network device for random access. Therefore, multiple terminal devices may select the same PRACH and the same random access preamble for contention-based random access (CBRA) at the same time. In this random access, only one of the multiple terminal devices may complete random access or multiple terminal devices may not complete random access, resulting in a low success rate of random access, which affects the user experience. Summary of the Invention

[0004] The present application provides a random access method and a random access device, which can improve the random access probability of a terminal device.

[0005] In a first aspect, a random access method is provided. The method can be performed by a first network node, or by a module (such as a chip or circuit) in the first network node, or by a logical node, logical module, or software that can implement all or part of the first network node. This application is not limited to this.

[0006] The method includes: a first network node receives a first message from a second network node, where the first message is used to indicate that the second network node has detected a random access request on a first physical random access channel, where the first physical random access channel is associated with a first physical beam, and where the first physical beam corresponds to the first network node; and the first network node sends a first random access response in response to the first message, where the first random access response carries information of a second physical beam, and where the second physical beam corresponds to the second network node.

[0007] Specifically, the above-mentioned first physical beam can also be a downlink reference signal sent by the first network node, or the first physical beam can also be understood as a downlink reference signal sent by the first network node through the first physical beam. This application does not limit this.

[0008] Specifically, the above-mentioned second physical beam can also be a downlink reference signal sent by the second network node (for example, a channel state information reference signal (CSI-RS), a synchronization signal block (SSB)), or the second physical beam can also be an uplink reference signal received by the second network node (for example, a sounding reference signal (SRS)), or the second physical beam can also be understood as a downlink reference signal sent by the second network node through the second physical beam, or the second physical beam can also be understood as an uplink reference signal received by the second network node through the second physical beam.

[0009] Through the above method, the terminal device requesting random access to the first network node can obtain the beam information associated with the second network node, so that the data transmission of the terminal device during the random access process does not occupy the resources of the first network node. This can not only improve the random access probability of the terminal device, but also improve the random access probability of other terminal devices requesting random access to the first network node.

[0010] Exemplarily, the first message includes at least one of the following information:

[0011] The information of the above-mentioned first physical random access channel, the first random access preamble code, the time slot information when the second network node detects the random access request, the timing advance (TA) amount obtained by the second network node based on the detected random access request, or the reference signal received power (RSRP) obtained by the second network node based on the detected random access request, etc. The first random access preamble code is associated with the above-mentioned first physical random access channel.

[0012] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first network node sends a second random access response, where the second random access response carries information about the first physical beam.

[0013] Through the above method, the first random access response carries information about the second physical beam corresponding to the second network node, and the second random access response carries information about the first physical beam corresponding to the first network node, so that the data transmission resources of at least two terminal devices with random access conflicts can be selected from the resources of at least two network nodes during the random access process, thereby reducing the probability of data transmission resource conflict during the random access process of at least two terminal devices with random access conflicts, thereby improving the probability of successful random access of at least two terminal devices with random access conflicts.

[0014] In combination with the first aspect, in some implementations of the first aspect, the first random access response includes first configuration information, and / or the second random access response includes second configuration information, and the first configuration information and the second configuration information are used to transmit data.

[0015] Specifically, the first configuration information included in the first random access response is associated with the second physical beam, and the second configuration information included in the second random access response is associated with the first physical beam.

[0016] In combination with the first aspect, in some implementations of the first aspect, the first random access response further includes a first validation condition for using the first configuration information, and / or the second random access response further includes a second validation condition for using the second configuration information.

[0017] By carrying the first effectiveness condition for using the first configuration information and / or the second effectiveness condition for using the second configuration information, not only can the terminal device with random access conflict select more reasonable configuration information to transmit data, but also the data transmission resource conflict of the terminal device with random access conflict can be avoided to a certain extent.

[0018] Exemplarily, the first configuration information includes at least one of the following information:

[0019] The identifier of the above-mentioned first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, configuration information of the demodulation reference signal (DMRS), timing advance (TA) value, or temporary cell radio network temporary identity (TC-RNTI), etc.

[0020] Exemplarily, the second configuration information includes at least one of the following information:

[0021] The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount, or TC-RNTI, etc.

[0022] On the second aspect, a random access method is provided, which can be executed by a first terminal device, or by a module (such as a chip or circuit) in the first terminal device, or by a logical node, logical module or software that can implement all or part of the first terminal device. This application does not limit this.

[0023] The method includes: a first terminal device determines a first physical beam, which corresponds to a first network node; the first terminal device sends a random access request through a first physical random access channel, which is associated with the first physical beam; the first terminal device receives a first random access response from the first network node in response to the above random access request, and the first random access response carries information of a second physical beam, which corresponds to a second network node.

[0024] Specifically, the above-mentioned first physical beam can also be a downlink reference signal sent by the first network node, or the first physical beam can also be understood as a downlink reference signal sent by the first network node through the first physical beam. This application does not limit this.

[0025] Specifically, the above-mentioned second physical beam may also be a downlink reference signal (for example, CSI-RS, SSB) sent by the second network node, or the second physical beam may also be an uplink reference signal (for example, SRS) received by the second network node, or the second physical beam may also be understood as a downlink reference signal sent by the second network node through the second physical beam, or the second physical beam may also be understood as an uplink reference signal received by the second network node through the second physical beam.

[0026] Through the above method, the terminal device requesting random access to the first network node can obtain the beam information associated with the second network node, so that the data transmission of the terminal device during the random access process does not occupy the resources of the first network node. This can not only improve the random access probability of the terminal device, but also improve the random access probability of other terminal devices requesting random access to the first network node.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the first random access response is sent by the first network node in response to a first message, and the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

[0028] Exemplarily, the first message includes at least one of the following information:

[0029] The information of the above-mentioned first physical random access channel, the first random access preamble code, the time slot information when the second network node detects the random access request, the TA amount obtained by the second network node based on the detected random access request, or the RSRP obtained by the second network node based on the detected random access request, etc. The first random access preamble code is associated with the first physical random access channel.

[0030] In combination with the second aspect, in some implementations of the second aspect, the above method also includes: the first terminal device receives a second random access response from the first network node, and the second random access response carries information of the above first physical beam.

[0031] Through the above method, the first random access response carries information about the second physical beam corresponding to the second network node, and the second random access response carries information about the first physical beam corresponding to the first network node, so that the data transmission resources of at least two terminal devices with random access conflicts can be selected from the resources of at least two network nodes during the random access process, thereby reducing the probability of data transmission resource conflict during the random access process of at least two terminal devices with random access conflicts, thereby improving the probability of successful random access of at least two terminal devices with random access conflicts.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the above-mentioned first random access response includes first configuration information, and / or the second random access response includes second configuration information, and the first configuration information and the second configuration information are used to transmit data. The above-mentioned method also includes: the first terminal device transmits data according to the above-mentioned first configuration information or the above-mentioned second configuration information.

[0033] Specifically, the first configuration information included in the first random access response is associated with the second physical beam, and the second configuration information included in the second random access response is associated with the first physical beam.

[0034] In combination with the second aspect, in certain implementations of the second aspect, the above-mentioned first random access response also includes a first effective condition for using the first configuration information, and / or the second random access response also includes a second effective condition for using the second configuration information, and the above-mentioned first terminal device transmits data according to the above-mentioned first configuration information or the above-mentioned second configuration information, including: the first terminal device determines the first configuration information or the second configuration information for transmitting data according to the first effective condition and / or the second effective condition; the first terminal device transmits data according to the determined first configuration information or second configuration information.

[0035] By carrying the first effectiveness condition for using the first configuration information and / or the second effectiveness condition for using the second configuration information, not only can the terminal device with random access conflict select more reasonable configuration information to transmit data, but also the data transmission resource conflict of the terminal device with random access conflict can be avoided to a certain extent.

[0036] Exemplarily, the first configuration information includes at least one of the following information:

[0037] The identifier of the above-mentioned first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, configuration information of the demodulation reference signal (DMRS), timing advance (TA) value, or temporary cell radio network temporary identity (TC-RNTI), etc.

[0038] Exemplarily, the second configuration information includes at least one of the following information:

[0039] The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount, or TC-RNTI, etc.

[0040] In a third aspect, a random access method is provided. The method can be executed by a second network node, or by a module (such as a chip or circuit) in the second network node, or by a logical node, logical module or software that can implement all or part of the second network node. This application is not limited to this.

[0041] The method includes: a second network node detecting a random access request on a first physical random access channel, where the first physical random access channel is associated with a first physical beam, and the first physical beam corresponds to the first network node; and the second network node sending a first message to the first network node in response to the random access request, where the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

[0042] Specifically, the above-mentioned first physical beam can also be a downlink reference signal sent by the first network node, or the first physical beam can also be understood as a downlink reference signal sent by the first network node through the first physical beam. This application does not limit this.

[0043] Through the above method, the random access request of the terminal device requesting random access to the first network node can be detected by the second network node, and the second network node can inform the first network node of the detection result, triggering the first network node to send the beam information associated with the second network node to the terminal device, so that the second network node assists the first network node to achieve random access of the terminal device.

[0044] Exemplarily, the first message includes at least one of the following information:

[0045] The information of the above-mentioned first physical random access channel, the first random access preamble code, the time slot information when the second network node detects the random access request, the TA amount obtained by the second network node based on the detected random access request, or the RSRP obtained by the second network node based on the detected random access request, etc. The first random access preamble code is associated with the above-mentioned first physical random access channel.

[0046] In a fourth aspect, a random access device is provided, comprising: a receiving unit for receiving a first message from a second network node, the first message being used to indicate that the second network node has detected a random access request on a first physical random access channel, the first physical random access channel being associated with a first physical beam, and the first physical beam corresponding to the first network node; a sending unit for sending a first random access response in response to the first message, the first random access response carrying information of a second physical beam, and the second physical beam corresponding to the second network node.

[0047] In combination with the fourth aspect, in certain implementations of the fourth aspect, the sending unit is further used to send a second random access response, where the second random access response carries information about the first physical beam.

[0048] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first random access response includes first configuration information, and / or the second random access response includes second configuration information, and the first configuration information and the second configuration information are used to transmit data.

[0049] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first random access response further includes a first validity condition for using the first configuration information, and / or the second random access response further includes a second validity condition for using the second configuration information.

[0050] In a fifth aspect, a random access device is provided, comprising: a processing unit for determining a first physical beam, the first physical beam corresponding to a first network node; a sending unit for sending a random access request through a first physical random access channel, the first physical random access channel being associated with the first physical beam; and a receiving unit for receiving a first random access response from the first network node in response to the random access request, the first random access response carrying information of a second physical beam, the second physical beam corresponding to the second network node.

[0051] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first random access response is sent by the first network node in response to a first message, and the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

[0052] In combination with the fifth aspect, in certain implementations of the fifth aspect, the receiving unit is further used to receive a second random access response from the first network node, where the second random access response carries information about the first physical beam.

[0053] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first random access response includes first configuration information, and / or the second random access response includes second configuration information, the first configuration information and the second configuration information are used to transmit data, and the processing unit is also used to transmit data according to the first configuration information or the second configuration information.

[0054] In combination with the fifth aspect, in certain implementations of the fifth aspect, the above-mentioned first random access response also includes a first effective condition for using the first configuration information, and / or the second random access response also includes a second effective condition for using the second configuration information, and the above-mentioned processing unit is used to transmit data according to the above-mentioned first configuration information or the above-mentioned second configuration information, including: the above-mentioned processing unit is used to determine the first configuration information or the second configuration information for transmitting data according to the first effective condition and / or the second effective condition; the above-mentioned processing unit is used to transmit data according to the determined first configuration information or the second configuration information.

[0055] In a sixth aspect, a random access device is provided, comprising: a receiving unit for detecting a random access request on a first physical random access channel, the first physical random access channel being associated with a first physical beam, and the first physical beam corresponding to a first network node; a sending unit for sending a first message to the above-mentioned first network node in response to the random access request, the first message being used to indicate that the second network node has detected a random access request on the first physical random access channel.

[0056] In the seventh aspect, a communication device is provided, comprising at least one processor, wherein the at least one processor is used to, by executing a computer program or instruction or through a logic circuit, enable the communication device to perform the method described in the first aspect and any possible embodiment of the first aspect, or enable the communication device to perform the method described in the second aspect and any possible embodiment of the second aspect, or enable the communication device to perform the method described in the third aspect and any possible embodiment of the third aspect.

[0057] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0058] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0059] In an eighth aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the method described in the first aspect and any possibility of the first aspect, or to execute the method described in the second aspect and any possibility of the second aspect, or to execute the method described in the third aspect and any possibility of the third aspect.

[0060] In a possible implementation, the communication device may be a chip or a chip system.

[0061] In the ninth aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method described in the first aspect and any possibility of the first aspect is executed, or the method described in the second aspect and any possibility of the second aspect is executed, or the method described in the third aspect and any possibility of the third aspect is executed.

[0062] In the tenth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method described in the first aspect and any possible method of the first aspect to be executed, or cause the method described in the second aspect and any possible method of the second aspect to be executed, or cause the method described in the third aspect and any possible method of the third aspect to be executed.

[0063] In the eleventh aspect, a communication system is provided, which includes the above-mentioned first network node and the above-mentioned second network node, the first network node is used to execute the method described in the above-mentioned first aspect and any possible method of the first aspect, and the second network node is used to execute the above-mentioned third aspect and any possible method of the third aspect.

[0064] For the relevant explanations and descriptions of the beneficial effects of the fourth to eleventh aspects, please refer to the descriptions of the first to third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] FIG1 is a schematic diagram of a communication system 100 to which the technical solution of the present application can be applied.

[0066] FIG2 is a schematic flowchart of a random access method 200 provided in an embodiment of the present application.

[0067] FIG3 is a schematic flowchart of a random access method 300 provided in an embodiment of the present application.

[0068] FIG4 is a schematic diagram of an example of association between a reference signal and a RO provided in an embodiment of the present application.

[0069] FIG5 is a schematic block diagram of a communication device 500 applicable to an embodiment of the present application.

[0070] FIG6 is a schematic block diagram of a communication device 600 applicable to an embodiment of the present application.

[0071] FIG7 is a schematic block diagram of a communication device 700 applicable to an embodiment of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0073] To facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0074] In this application, "used to indicate" or "indicates" can include direct indication and indirect indication, or "used to indicate" or "indicates" can indicate explicitly and / or implicitly. For example, when describing that a certain information is used to indicate information I, it can include that the information directly indicates I or indirectly indicates I, but it does not necessarily mean that the information contains I.

[0075] In the embodiments shown below, the first, second, third, fourth and various numbers are only used for the convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different messages are distinguished.

[0076] In the embodiments of this application, words such as "exemplary," "for example," "illustratively," and "as another example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as an "exemplary" in this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0077] The terms "include", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically emphasized otherwise.

[0078] In the embodiments of the present application, the descriptions involving A sending a message, information or data to B, and B receiving a message, information or data from A are intended to illustrate to which object the message, information or data is to be sent, and do not limit whether they are sent directly or indirectly via other nodes.

[0079] First, a communication system to which the embodiments of the present application are applicable is described.

[0080] FIG1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application. As shown in FIG1 , the communication system 100 includes: a network device 110 and a terminal device 120 .

[0081] The terminal device 120 is a device with wireless transceiver functions, which can be referred to as user equipment (UE), access terminal, subscriber unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device 120 may also be a satellite phone, a cellular phone, a smart phone, a wireless data card, a wireless modem, a machine type communication device, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a customer-premises equipment (CPE), a smart point of sale (POS), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a communication device carried on a high-altitude aircraft, a wearable device, a drone, a robot, a terminal in device-to-device (D2D) communication, a terminal in vehicle-to-everything (V2X), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a remote medical device, or a similar device. This application does not limit the wireless terminals in medical, smart grid, transportation safety, smart city, smart home, or terminal devices in communication networks evolved after 5G.

[0082] The communication device used to implement the functions of the terminal device 120 can be a terminal device, or a device that can support the terminal device to implement the functions, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In this application, the chip system can be composed of a chip or include a chip and other discrete devices.

[0083] The network device 110 is a device with wireless transceiver functions, which is used to communicate with the terminal device 120. The network device 110 can be a node in a radio access network (RAN), which can be called a base station or a RAN node. It can be an evolved Node B (eNB or eNodeB) of long term evolution (LTE); or a base station of a 5G network such as a gNodeB (gNB) or a base station in a public land mobile network (PLMN) evolved after 5G, a broadband network gateway (BNG), an aggregation switch, or a third generation partnership project (3GPP) access device.

[0084] The RAN can be configured as a RAN defined by the 3GPP protocol, an open radio access network (O-RAN), or a cloud radio access network (C-RAN). The network device 110 can also include various forms of base stations, such as macro base stations, micro base stations (also known as small stations), relay stations, transmission reception points (TRPs), transmitting points (TPs), mobile switching centers, and devices that perform base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, network devices in non-terrestrial networks (NTNs), etc., without specific limitation.

[0085] The network device 110 may also be a network element or module that can implement some functions of the base station. For example, the network device 110 may be one or more of the following: a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). The functions of the CU and DU may be implemented by different network elements, or simultaneously by the baseband unit (BBU) of the base station. Optionally, the CU may be further separated into a CU-control plane (CP) and a CU-user plane (UP). The functions of the RU may be implemented by the radio frequency equipment of the base station. For example, the radio frequency equipment of the base station may be a radio frequency remote processing unit (RRU), a pico remote radio unit (pRRU), an active antenna unit (AAU), or other units, modules, or devices with radio frequency processing functions. The communication interface protocol between the BBU and the radio frequency equipment can be a common public radio interface (CPRI) interface protocol, an enhanced common public radio interface (eCPRI) interface protocol, or a fronthaul interface protocol between the DU and RU in the O-RAN system, etc., without limitation.

[0086] The communication device used to implement the functions of the network device 110 can be a network device, or a device that can support the network device to implement the functions, such as a chip system. The device can be installed in the network device or used in conjunction with the network device. The chip system in the embodiment of the present application can be composed of a chip, or it can include a chip and other discrete devices.

[0087] It should be noted that the above-mentioned communication system 100 may include any number of network devices 110 and / or any number of terminal devices 120, and this application does not limit this.

[0088] In the embodiment of the present application, the communication system 100 may be the following systems: a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunication system (UMTS), a fifth generation (5G) communication system, a sixth generation (6G) communication system, a high altitude platform station (HAPS) communication system, a non-terrestrial network (NTN) communication system, etc. The communication system 100 may also be a terrestrial cellular communication system, a D2D communication system, a V2X communication system, an M2M communication system, a machine type communication (MTC), an Internet of Things (IoT) communication system, a vehicle-to-vehicle communication system, or other communication systems.

[0089] The communication system 100 may also be a single-hop relay system or a multi-hop relay system, an integrated access and backhaul (IAB) system, a reconfigurable intelligent surface (RIS) communication system, etc., without limitation.

[0090] When a terminal device in an idle state (idle mode) or inactive state (inactive mode) needs to transmit data to a network device, it must perform random access to enter a connected state (connected mode) or active state (active mode) before it can transmit data to the network device. During random access, the terminal device selects a physical random access channel (PRACH) and a random access preamble from the PRACH resource pool and preamble resource pool configured by the network device for random access.

[0091] Exemplarily, the terminal device may perform random access through a four-step (4-step) random access method or a two-step (2-step) random access method.

[0092] The 4-step random access method specifically includes the following steps:

[0093] 1. The terminal device sends message 1 (Msg1) to the network device. Correspondingly, the network device receives Msg1 from the terminal device.

[0094] Specifically, the terminal device selects a PRACH and a preamble from the PRACH resource pool and preamble resource pool configured by the network device, and sends the selected preamble through the selected PRACH.

[0095] 2. The network device sends message 2 (Msg2) to the terminal device. Correspondingly, the terminal device receives Msg2 from the network device.

[0096] The above Msg2 is also a random access report (RAR), including an uplink grant (UL grant).

[0097] 3. The terminal device sends message 3 (Msg3) to the network device via the physical uplink shared channel (PUSCH) according to the UL grant included in Msg2. Correspondingly, the network device receives Msg3 from the terminal device.

[0098] The above Msg3 includes control plane data and / or user plane data.

[0099] 4. After the network device correctly receives message 3 (Msg3), it sends message 4 (Msg4) to the terminal device. Correspondingly, the terminal device receives Msg4 from the network device.

[0100] The above Msg4 indicates contention resolution.

[0101] The 2-step random access method specifically includes the following steps:

[0102] 1. The terminal device sends message A (MsgA) to the network device. Correspondingly, the network device receives MsgA from the terminal device.

[0103] Specifically, the above message A includes information sent by the terminal device on the PRACH and PUSCH. The terminal device selects a PRACH and a preamble from the PRACH resource pool and preamble resource pool configured by the network device, and sends the selected preamble via the selected PRACH. In addition, the terminal device sends control plane data and / or user plane data to the network device via the PUSCH.

[0104] 2. The network device sends message B (MsgB) to the terminal device. Correspondingly, the terminal device receives MsgB from the network device.

[0105] The aforementioned MsgB is also a type of RAR.

[0106] For example, if the network device correctly decodes the PUSCH in the above message A, the MsgB is also called success RAR, indicating contention resolution; if the network device does not correctly demodulate the PUSCH in the above message A, the MsgB is also called fallback RAR, including uplink grant (UL grant).

[0107] If the terminal device receives a fallback RAR, it will execute step 3 of the four-step random access method according to the UL grant included in the fallback RAR, that is, send Msg3 to the network device through PUSCH according to the UL grant included in MsgB.

[0108] In both the 4-step and 2-step random access methods, multiple devices may select the same PRACH and preamble for contention-based random access (CBRA). In this CBRA, only one device may complete random access, or none may complete random access, reducing the success rate of random access and impacting the user experience.

[0109] Based on the above technical problems, the present application provides a random access method 200, which can improve the success rate of random access of terminal devices.

[0110] Figure 2 is a schematic flow chart of a random access method 200 provided in an embodiment of the present application. In this embodiment, the method is illustrated by taking the first terminal device, the first network node, and the second network node as the execution subjects of the interactive illustration as examples, but the present application does not limit the execution subjects of the interactive illustration. For example, the first terminal device in Figure 2 can also be a chip, a chip system, or a processor that supports the method that can be implemented by the first terminal device, or a logic module or software that can implement all or part of the first terminal device; the first network node can also be a chip, a chip system, or a processor that supports the method that can be implemented by the first network node, or a logic module or software that can implement all or part of the first network node; the second network node can also be a chip, a chip system, or a processor that supports the method that can be implemented by the second network node, or a logic module or software that can implement all or part of the second network node.

[0111] The random access method 200 may include the following steps:

[0112] In step S210 , the first terminal device determines a first physical beam, where the first physical beam corresponds to a first network node.

[0113] Exemplarily, the first terminal device determining the first physical beam includes: the first terminal device can detect the first physical beam from the first network node, so the first terminal device can determine the first physical beam.

[0114] Exemplarily, the above-mentioned first physical beam can also be a downlink reference signal sent by the first network node, or the first physical beam can also be understood as a downlink reference signal sent by the first network node through the first physical beam. This application does not limit this.

[0115] Step S212: The first terminal device sends a random access request through a first physical random access channel, where the first physical random access channel is associated with the above-mentioned first physical beam.

[0116] Optionally, the first network node may indicate the PRACH resource pool and preamble resource pool associated with the first physical beam through public radio resource control (RRC) signaling. After the first terminal device determines the first physical beam, it may select the first physical random access channel and the first random access preamble code from the PRACH resource pool and preamble resource pool associated with the first physical beam for random access. Exemplarily, the first terminal device sending a random access request through the first physical random access channel may be the first terminal device sending a first random access preamble code through the first physical random access channel.

[0117] Since the first terminal device has not yet accessed the cell, the terminal device will use a wide beam to send a random access request on the first random access channel, so the second network node can detect the above random access request on the first physical random access channel.

[0118] The first terminal device may be located in an overlapping area of ​​a first area covered by the first network node and a second area covered by the second network node.

[0119] In step S214, the second network node sends a first message to the first network node in response to the detected random access request, where the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel. Accordingly, the first network node receives the first message from the second network node.

[0120] Exemplarily, the first message includes at least one of the following information:

[0121] The information of the above-mentioned first physical random access channel, the first random access preamble code, the time slot information when the second network node detects the random access request, the TA amount obtained by the second network node based on the detected random access request, or the RSRP obtained by the second network node based on the detected random access request, etc. The first random access preamble code is associated with the first physical random access channel.

[0122] Step S216: The first network node sends a first random access response in response to the received first message, where the first random access response carries information of a second physical beam corresponding to the second network node.

[0123] Exemplarily, the second physical beam is associated with at least one of the following reference signals:

[0124] Channel state information reference signal (CSI-RS), synchronization signal block (SSB), or sounding reference signal (SRS), etc.

[0125] Exemplarily, the above-mentioned second physical beam can also be understood as a downlink reference signal (for example, CSI-RS, SSB) sent by the second network node or an uplink reference signal (for example, SRS) sent by the terminal device to the second network node, or the second physical beam can also be understood as a downlink reference signal (for example, CSI-RS, SSB) sent by the second network node through the second physical beam, or the second physical beam can also be understood as an uplink reference signal (for example, SRS) sent by the terminal device to the second network node through the second physical beam, etc. This application does not limit this.

[0126] Through the above-mentioned random access method 200, a terminal device requesting random access to the main network node (for example, the above-mentioned first network node) can obtain the beam information associated with the secondary network node (for example, the above-mentioned second network node), so that the terminal device does not occupy the resources of the main network node, which not only improves the random access probability of the terminal device, but also improves the random access probability of other terminal devices requesting random access to the main network node.

[0127] Next, the embodiment of the present application uses a multi-TRP scenario as an example to describe in detail the technical solution provided by the embodiment of the present application, as shown in FIG3 , which is a schematic flowchart of a random access method 300. Specifically, TRP1 in the random access method 300 can be an example of the first network node described above, TRP2 in the random access method 300 can be an example of the second network node described above, and UE1 in the random access method 300 can be an example of the first terminal device described above. Furthermore, the random access method 300 also includes UE2, whose random access conflicts with UE1.

[0128] Specifically, the random access method 300 may include the following steps:

[0129] In steps S310 to S312, TRP1 sends a first physical beam in a first area.

[0130] To help UEs quickly locate their cell when powered on or while moving, each cell is scanned in the spatial domain using physical beams. Each cell periodically sends reference signals in the time domain. The UE detects the physical broadcast channel (PBCH) and the reference signals to obtain basic cell information and achieve downlink synchronization, enabling effective communication with the cell.

[0131] Among them, TRP1, TRP2, etc. are configured with multiple reference signals, each of which can be uniquely identified by a reference signal index. For example, the reference signal sent by TRP1 can be SSB1, and the reference signal sent by TRP2 can be SSB2. The UE can detect the reference signals sent by TRP1 and / or TRP2 and determine the random access channel (RACH) transmission occasion (RO) based on the detected reference signals. That is, the reference signal is associated with the RO.

[0132] Exemplarily, the reference signal is an SSB, and the association relationship between the SSB and the RO may be as shown in Figure 4. Figure 4 (a) shows a case where one SSB corresponds to multiple ROs, and Figure 4 (b) shows a case where multiple SSBs correspond to one RO.

[0133] For example, one SSB in FIG4(a) is mapped to eight ROs (RO1, RO2, RO3, RO4, RO5, RO6, RO7, and RO8), and the starting index of the preamble on each RO is 0, and the number is 60, that is, the index of the preamble on each RO is 0 to 59. A UE that detects the SSB shown in FIG4(a) can select any preamble in any of the eight ROs shown in FIG4(a) for random access.

[0134] For example, the four SSBs (SSB0, SSB1, SSB2, SSB3) in FIG4(b) are mapped to one RO, the number of preambles on the RO is 48, and the number of preambles corresponding to each SSB is 12. A UE that detects SSB0 shown in FIG4(b) can select preambles with indexes of 0 to 11 in the RO shown in FIG4(b) for random access; a UE that detects SSB1 shown in FIG4(b) can select preambles with indexes of 16 to 27 in the RO shown in FIG4(b) for random access; a UE that detects SSB2 shown in FIG4(b) can select preambles with indexes of 32 to 43 in the RO shown in FIG4(b) for random access; a UE that detects SSB3 shown in FIG4(b) can select preambles with indexes of 48 to 59 in the RO shown in FIG4(b) for random access.

[0135] By associating the reference signal with the RO, TRP1 and / or TRP2 can determine the downlink beam of the reference signal detected by the UE through the RO selected by the UE, thereby determining the downlink beam for subsequently sending information to the UE.

[0136] When TRP1 sends the first physical beam in the first area, both UE1 and UE2 can detect the first physical beam sent by TRP1.

[0137] Similarly, when TRP2 sends the second physical beam in the second area, UE1 can detect the second physical beam sent by TRP2, but UE2 cannot detect the second physical beam sent by TRP2 due to reasons such as being too far away from TRP2.

[0138] In step S314 , UE1 determines a first physical beam and selects a first PRACH and a first preamble associated with the first physical beam for random access.

[0139] In step S316, UE2 determines the first physical beam, and also selects the first PRACH and the first preamble associated with the first physical beam for random access.

[0140] It can be seen from this that the random accesses of UE1 and UE2 conflict.

[0141] In steps S318 to S320, UE1 sends a random access request #1 through the first PRACH, where the first PRACH is associated with the first physical beam.

[0142] Exemplarily, UE1 sending the random access request #1 through the first PRACH may be that UE1 sends the first preamble through the first PRACH.

[0143] Since UE1 has not yet accessed the cell, UE1 will use a wide beam to send a random access request #1 on the first PRACH. Therefore, both TRP1 and TRP2 can detect the random access request #1 sent by UE1 on the first PRACH.

[0144] For example, the random access request #1 from UE1 detected by TRP2 can be expressed by the following formula 1: 2,RACH =h 21 S RACH +n 2,RACH

[0145] Among them, h 21 represents the channel factor between TRP2 and UE1, S RACH Indicates the first preamble used by UE1, n 2,RACH It is the Gaussian white noise superimposed when passing through the channel.

[0146] In step S322, UE2 sends a random access request #2 via a first PRACH, where the first PRACH is associated with the first physical beam.

[0147] Exemplarily, UE2 sending the random access request #2 through the first PRACH may be UE2 sending the first preamble through the first PRACH.

[0148] Since UE2 has not yet accessed the cell, UE2 will use a wide beam to send a random access request #2 on the first PRACH. Therefore, TRP1 can detect the random access request #2 sent by UE2 on the first PRACH. However, TRP2 cannot detect the random access request #2 sent by UE2 on the first PRACH due to reasons such as being too far away from UE2.

[0149] For example, the random access request #3 detected by TRP1 is a signal combining the random access request #1 from UE1 and the random access request #2 from UE2. The random access request #3 can be expressed by the following formula 2: 1,RACH =(h 11 +h 12 )S RACH +n 1,RACH

[0150] Among them, h 11 represents the channel factor between TRP1 and UE1, h 12 represents the channel factor between TRP1 and UE2, S RACH Indicates the first preamble used by UE1 and UE2, n 1,RACH It is the Gaussian white noise superimposed when passing through the channel.

[0151] Step S324: TRP2 sends a first message to TRP1 in response to the detected random access request #1, where the first message is used to indicate that TRP2 has detected the random access request #1 on the first PRACH. Accordingly, TRP1 receives the first message from TRP2.

[0152] Exemplarily, the first message includes at least one of the following information:

[0153] The first preamble is associated with the first PRACH, including the information of the first PRACH, the first preamble, the time slot information when TRP2 detects the first preamble, the TA amount obtained by TRP2 based on the detected first preamble, or the RSRP obtained by TRP2 based on the detected first preamble.

[0154] In steps S326 to S328, TRP1 sends a first random access response in response to the first message. The first random access response carries information of the second physical beam, and the second physical beam corresponds to TRP2.

[0155] Specifically, the first random access response may include a first preamble.

[0156] Specifically, the first random access response may further include first configuration information, where the first configuration information is used to transmit data.

[0157] Exemplarily, the first configuration information includes at least one of the following information:

[0158] The above-mentioned first preamble identifier (preamble ID#1), time domain resources for data transmission, frequency domain resources for data transmission, configuration information of demodulation reference signal (DMRS), TA amount, or temporary cell radio network temporary identity (TC-RNTI), etc.

[0159] Optionally, the first random access response may further include a first validation condition for using the first configuration information.

[0160] For example, the first validity condition is: the RSRP of the downlink reference signal received by UEi from TRP2 is greater than or equal to threshold #1, which can be expressed as RSRP TRP2,UEi ≥Th#1. And / or, the first validity condition is: the difference between the RSRP of the downlink reference signal received by UEi from TRP1 and the RSRP of the downlink reference signal received by UEi from TRP2 is less than or equal to threshold #2, which can be expressed as RSRP TRP1,UEi -RSRP TRP2,UEi ≤Th#2.

[0161] One implementation manner in which the above-mentioned first random access response includes the first validation condition is: the first random access response may carry the above-mentioned threshold #1, or the first random access response may carry the above-mentioned threshold #2, and the validation methods corresponding to the threshold #1 and the threshold #2 may be pre-configured on UEi.

[0162] Another implementation manner in which the first random access response includes the first validation condition is as follows: the first random access response may carry the threshold #1 and the validation method corresponding to the threshold #1, or the first random access response may carry the threshold #2 and the validation method corresponding to the threshold #2. This application does not limit this.

[0163] Optionally, the above-mentioned first random access response may also include first indication information, and the first indication information is used to indicate a method for sending a contention resolution signal. Exemplarily, the first indication information may be used to indicate a method for sending contention resolution: TRP1 sends a contention resolution signal to a UE that uses the first configuration information to transmit data through a first physical beam, and accordingly, the UE that uses the first configuration information to transmit data receives the contention resolution signal from the first physical beam corresponding to TRP1. Or, exemplarily, the first indication information may be used to indicate a method for sending contention resolution: TRP1 sends a contention resolution signal to a UE that uses the first configuration information to transmit data through a second physical beam of TRP2, and accordingly, the UE that uses the first configuration information to transmit data receives the contention resolution signal from the second physical beam corresponding to TRP2.

[0164] In steps S330 to S332 , TRP1 sends a second random access response in response to the detected random access request message # 3 , where the second random access response carries information about the first physical beam.

[0165] Specifically, the second random access response may include the first preamble.

[0166] Specifically, the second random access response may further include second configuration information, where the second configuration information is used to transmit data.

[0167] Exemplarily, the second configuration information includes at least one of the following information:

[0168] The identifier of the first preamble (preamble ID#1), time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount, or TC-RNTI, etc.

[0169] Optionally, the second random access response may further include a second validation condition for using the second configuration information.

[0170] For example, the second validity condition is: the RSRP of the downlink reference signal received by UEi from TRP1 is greater than or equal to threshold #3, which can be expressed as RSRP TRP1,UEi ≥Th#3. And / or, the second validity condition is: the difference between the RSRP of the downlink reference signal received by UEi from TRP2 and the RSRP of the downlink reference signal received by UEi from TRP1 is less than or equal to threshold #4, which can be expressed as RSRP TRP2,UEi -RSRP TRP1,UEi ≤Th#4.

[0171] One implementation manner in which the above-mentioned second random access response includes the second validation condition is: the second random access response may carry the above-mentioned threshold #3, or the second random access response may carry the above-mentioned threshold #4, and the validation method corresponding to the threshold #3 and the threshold #4 may be pre-configured on UEi.

[0172] Another implementation manner in which the second random access response includes the second validation condition is as follows: the second random access response may carry the threshold #3 and the validation method corresponding to the threshold #3, or the second random access response may carry the threshold #4 and the validation method corresponding to the threshold #4. This application does not limit this.

[0173] By carrying the first validity condition for using the first configuration information and / or the second validity condition for using the second configuration information, not only can the UE select more reasonable configuration information to transmit data, but to a certain extent, it can also avoid configuration resource conflicts for data transmission of multiple UEs with random access conflicts.

[0174] It should be noted that the first random access response and the second random access response may be the same message or different messages, and this application does not limit this.

[0175] Exemplarily, when the first random access response and the second random access response are different messages, the content included in the first random access response may be as shown in Table 1 below, and the content included in the second random access response may be as shown in Table 2 below.

[0176] Table 1

[0177] It should be noted that the first random access response may include part of the content in Table 1 above. For example, the above-mentioned first random access response may include preamble ID#1, the first configuration information, the index of the second physical beam / the index of the second physical beam group / the index of the second reference signal, or the above-mentioned first random access response may include preamble ID#1, the first configuration information, the index of the second physical beam / the index of the second physical beam group / the index of the second reference signal, Th#1 / Th#2. Alternatively, the above-mentioned first random access response may include all the content in Table 1 above, which is not limited in this application.

[0178] Table 2

[0179] It should be noted that the second random access response may include part of the content in Table 2 above. For example, the second random access response may include preamble ID#1, the second configuration information, the index of the first physical beam / the index of the first physical beam group / the index of the first reference signal, or the second random access response may include preamble ID#1, the second configuration information, the index of the first physical beam / the index of the first physical beam group / the index of the first reference signal, Th#3 / Th#4. Alternatively, the second random access response may include all the content in Table 2 above, which is not limited in this application.

[0180] Exemplarily, when the first random access response and the second random access response are the same message, the content included in the message may be as shown in Table 3 below.

[0181] Table 3

[0182] It should be noted that when the first random access response and the second random access response are the same message, the message may include part of the content in Table 3 above. For example, the message may include preamble ID#1, first configuration information, index of the second physical beam / index of the second physical beam group / index of the second reference signal, second configuration information, index of the first physical beam / index of the first physical beam group / index of the first reference signal, or the message may include preamble ID#1, first configuration information, index of the second physical beam / index of the second physical beam group / index of the second reference signal, Th#1 / Th#2, second configuration information, index of the first physical beam / index of the first physical beam group / index of the first reference signal, Th#3 / Th#4. Alternatively, the message may include all the content in Table 3 above, which is not limited in this application.

[0183] For example, the first physical beam can be replaced with a first physical beam group corresponding to the first network node or a first reference signal corresponding to the first network node, etc., which is not limited in this application. The first physical beam group includes multiple physical beams. Similarly, the second physical beam can be replaced with a second physical beam group corresponding to the second network node or a second reference signal corresponding to the second network node, etc., which is not limited in this application. The second physical beam group includes multiple physical beams.

[0184] Specifically, after sending random access request #1, UE1 starts response time window #1 and listens for a random access response from TRP1 within the response time window #1. Specifically, UE1 determines a radio network temporary identity (RNTI) #1 based on the channel resources used to send random access request #1, and uses the RNTI #1 to listen to the physical downlink control channel (PDCCH) used to schedule TRP1's random access response within the response time window #1, and receives the random access response from TRP1 based on the monitored PDCCH. UE1 determines whether the received random access response is a response to random access request #1 based on the preamble ID included in the received random access response.

[0185] Because the channel resources used by UE2 to send random access request #2 are the same as those used by UE1 to send random access request #1, UE2 also uses the same RNTI #1 as UE1 and monitors the PDCCH used to schedule the random access response of TRP1 within the same response time window #1 as UE1. UE2 receives the random access response from TRP1 based on the monitored PDCCH. UE2 determines whether the received random access response is a response to random access request #2 based on the preamble ID included in the received random access response.

[0186] UE1 may monitor the first random access response and the second random access response from TRP1, and UE2 may also monitor the first random access response and the second random access response from TRP1.

[0187] Step S334: UE1 determines to use the first configuration information or the second configuration information to transmit data.

[0188] Exemplarily, since UE1 can receive both the first physical beam from TRP1 and the second physical beam from TRP2, UE1 can randomly determine to use the first configuration information or the second configuration information to transmit data.

[0189] Alternatively, UE1 may determine, based on the received multiple sets of configuration information, that the first configuration information associated with the first physical beam conflicts, and thus UE1 determines to use the first configuration information to transmit data.

[0190] Alternatively, UE1 may determine the first configuration information or the second configuration information for transmitting data according to the first validation condition and / or the second validation condition.

[0191] For example, UE1 determines the configuration information for transmitting data according to the first validity condition: when RSRP TRP2,UE1 ≥Th#1 and / or RSRP TRP1,UE1 -RSRP TRP2,UE1 ≤Th#2, UE1 determines to use the first configuration information to transmit data; otherwise, UE1 determines to use the second configuration information to transmit data.

[0192] For example, UE1 determines the configuration information for transmitting data according to the second validity condition: when RSRP TRP1,UE1 ≥Th#3 and / or RSRP TRP2,UE1 -RSRP TRP1,UE1 ≤Th#4, UE1 determines to use the second configuration information to transmit data; otherwise, UE1 determines to use the first configuration information to transmit data.

[0193] Step S336: UE1 transmits data according to the determined first configuration information or second configuration information.

[0194] Step S338: After correctly receiving the data, TRP1 sends message #1 to UE1. Message #1 is used to indicate contention resolution for UE1.

[0195] Optionally, if UE1 uses the first configuration information to transmit data, TRP1 sends Message #1 to UE1 through steps S346 and S348. In step S346, after correctly receiving the data, TRP1 sends Message #1 to TRP2. In response, TRP2 receives Message #1 from TRP1. In step S348, TRP2 sends Message #1 to UE1 via the second physical beam.

[0196] By sending the contention resolution signal to UE1 through TRP2, signal interference caused when TRP1 sends contention resolution signals to UE1 and UE2 at the same time can be avoided.

[0197] Step S340: UE2 determines whether to use the first configuration information or the second configuration information to transmit data.

[0198] For example, since UE2 can receive the first physical beam from TRP1 but cannot receive the second physical beam from TRP2, UE2 determines to use the second configuration information to transmit data.

[0199] Alternatively, UE2 may determine the first configuration information or the second configuration information for transmitting data according to the first validation condition and / or the second validation condition.

[0200] For example, when RSRP TRP1,UE2 ≥Th#3 and / or RSRP TRP2,UE2 -RSRP TRP1,UE2≤Th#4, UE2 determines to use the second configuration information to transmit data; otherwise, UE2 determines to use the first configuration information to transmit data.

[0201] For example, when RSRP TRP2,UE2 ≥Th#1 and / or RSRP TRP1,UE2 -RSRP TRP2,UE2 ≤Th#2, UE2 determines to use the first configuration information to transmit data; otherwise, UE2 determines to use the second configuration information to transmit data.

[0202] Step S342: UE2 transmits data according to the determined first configuration information or second configuration information.

[0203] Step S344: After correctly receiving the data, TRP1 sends message #2 to UE2. Message #1 is used to indicate contention resolution for UE2.

[0204] Through the above-mentioned random access method 300, the auxiliary TRP (for example, the above-mentioned TRP2) can assist in triggering the main TRP (for example, the above-mentioned TRP1) to indicate at least one set of configuration resources for data transmission to multiple terminals with random access conflicts, so as to avoid conflicts in configuration resources for data transmission of multiple terminals with random access conflicts as much as possible, thereby improving the random access success rate of multiple terminals with random access conflicts.

[0205] The random access method 200 and the random access method 300 may be applied to both the 4-step random access method and the 2-step random access method.

[0206] Exemplarily, when the random access method 200 and the random access method 300 are applicable to the 4-step random access method, the random access request involved in the random access method 200, the random access request #1, and the random access request #2 involved in the random access method 300 may be equivalent to Msg1 in the 4-step random access method, the first random access response and the second random access response involved in the random access method 200 and the random access method 300 may be equivalent to Msg2 in the 4-step random access method, step S336 and step S342 involved in the random access method 300 may be equivalent to Msg3 in the 4-step random access method, and message #1 and message #2 involved in the random access method 300 may be equivalent to Msg4 in the 4-step random access method.

[0207] Exemplarily, when the random access method 200 and the random access method 300 are applicable to the 2-step random access method, the random access request involved in the random access method 200, the random access request #1, and the random access request #2 involved in the random access method 300 may be equivalent to MsgA in the 2-step random access method. The first random access response and the second random access response involved in the random access method 200 and the random access method 300 may be equivalent to MsgB in the 2-step random access method, where MsgB is a fallback RAR. Specifically, after detecting the MsgA, the above-mentioned TRP2 is unable to correctly demodulate the PUSCH in the MsgA, and TRP2 sends the above-mentioned first message to TRP1. TRP1 sends a first fallback RAR (fallback RAR) in response to the received first message; and after detecting the MsgA, TRP1 is unable to correctly demodulate the PUSCH in the MsgA. TRP1 sends a second fallback RAR (fallback RAR) in response to the detected MsgA. The first fallback RAR (fallback RAR) here is equivalent to the first random access response involved in the above-mentioned random access method 200 and the above-mentioned random access method 300, that is, the content included in the first fallback RAR (fallback RAR) can be similar to the content included in the above-mentioned first random access response; the second fallback RAR (fallback RAR) here is equivalent to the second random access response involved in the above-mentioned random access method 300, that is, the content included in the second fallback RAR (fallback RAR) can be similar to the content included in the above-mentioned second random access response.

[0208] Finally, the device embodiment of the embodiment of the present application is introduced.

[0209] To implement the various functions of the method provided herein, the first terminal device, the first network node, and the second network node may each include hardware structures and / or software modules, and implement the aforementioned functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular one of the aforementioned functions is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0210] Figure 5 is a schematic block diagram of a communication device 500 according to an embodiment of the present application. The communication device 500 includes at least one processor 510 and a communication interface 520. Optionally, the at least one processor 510 and the communication interface 520 may be interconnected via a bus 530. The communication device 500 may be a first terminal device, a first network node, or a second network node.

[0211] Optionally, the communication device 500 may further include a memory 540. The memory 540 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and is used to store relevant instructions and data.

[0212] The at least one processor 510 may be one or more central processing units (CPUs). In the case where the at least one processor 510 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0213] When the communication device 500 is a first terminal device, illustratively, the communication device 500 is used to perform the following operations: determine a first physical beam, or send a random access request through a first physical random access channel, etc.

[0214] When the communication device 500 is a second network node, illustratively, the communication device 500 is configured to perform the following operations: detecting a random access request on a first physical random access channel, or sending a first message to the first network node in response to the random access request, etc.

[0215] When the communication device 500 is a first network node, illustratively, the communication device 500 is configured to perform the following operations: receive a first message from a second network node, or send a first random access response in response to the received first message, etc.

[0216] When the communication device 500 is the first terminal device / first network node / second network node, it will be responsible for executing the methods or steps related to the first terminal device / first network node / second network node in the aforementioned method embodiments.

[0217] The above description is merely exemplary. For details, please refer to the contents of the above method embodiments. The implementation of each operation in FIG5 may also correspond to the corresponding description of the method embodiment shown in FIG2 or FIG3.

[0218] Figure 6 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. Communication device 600 can be a first terminal device, a second network node, or a first network node, or can be a chip or module within the first terminal device, the second network node, or the first network node, configured to implement the methods described in the above embodiments. Communication device 600 includes a transmitting unit 610, a receiving unit 620, and a processing unit 630. The following provides an exemplary description of transmitting unit 610, receiving unit 620, and processing unit 630.

[0219] The sending unit 610 is used to perform a sending action of the communication device 600, and the receiving unit 620 is used to perform a receiving action of the communication device 600. Optionally, the sending unit 610 and the receiving unit 620 in the embodiment of the present application can also be combined into one transceiver unit.

[0220] When the communication apparatus 600 is a first terminal device, illustratively, the processing unit 630 is used to determine a first physical beam, and the sending unit 610 is used to send a random access request through a first physical random access channel, etc.

[0221] When the communication device 600 is a second network node, illustratively, the receiving unit 620 is configured to detect a random access request on a first physical random access channel, and the sending unit 610 is configured to send a first message to the first network node in response to the random access request.

[0222] When the communication device 600 is a first network node, illustratively, the receiving unit 620 is configured to receive a first message from a second network node, and the sending unit 610 is configured to send a first random access response in response to the received first message.

[0223] When the communication device 600 is a first terminal device / second network node / first network node, it will be responsible for executing the methods or steps related to the first terminal device, second network node, or first network node in the aforementioned method embodiments.

[0224] Optionally, the communication device 600 further includes a storage unit 640, which is used to store a program or code for executing the aforementioned method.

[0225] The device embodiments shown in Figures 5 and 6 are used to implement the content described in Figure 2 or Figure 3. The specific execution steps and methods of the devices shown in Figures 5 and 6 can refer to the content described in the above method embodiments.

[0226] Figure 7 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. The communication device 700 is used to implement the functions of the first terminal device / the second network node / the first network node. The communication device 700 may be a chip in the first terminal device / the second network node / the first network node.

[0227] Communication device 700 includes an input / output interface 720 and at least one processor 710. The input / output interface 720 may be an input / output circuit. The at least one processor 710 may be a signal processor, a chip, or other integrated circuit capable of implementing the methods of the present application. The input / output interface 720 is used for inputting or outputting signals or data.

[0228] For example, when the communication apparatus 700 is a first terminal device, the input / output interface 720 is configured to send a random access request via a first physical random access channel. The at least one processor 710 is configured to determine a first physical beam.

[0229] For example, when the communication device 700 is a second network node, the input / output interface 720 is configured to detect a random access request on a first physical random access channel, or the input / output interface 720 is configured to send a first message to the first network node in response to the random access request.

[0230] For example, when the communication device 700 is a first network node, the input / output interface 720 is configured to receive a first message from a second network node, or the input / output interface 720 is configured to send a first random access response in response to the received first message.

[0231] In one possible implementation, at least one processor 710 implements the functions implemented by the first terminal device or the second network node or the first network node by executing instructions stored in the memory.

[0232] Optionally, the communication device 700 further includes a memory.

[0233] Optionally, the processor and memory are integrated together.

[0234] Optionally, the memory is outside the communication device 700 .

[0235] In one possible implementation, at least one processor 710 may be a logic circuit, and at least one processor 710 inputs / outputs messages or signals through an input / output interface 720. The logic circuit may be a signal processor, a chip, or other integrated circuit that can implement the method of the embodiment of the application.

[0236] The above description of the communication device 700 is only an exemplary description. The communication device 700 can be used to execute the method described in the above embodiments. For specific content, please refer to the description of the above method embodiments, which will not be repeated here.

[0237] The present application also provides a chip, comprising at least one processor, configured to call and execute instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0238] The present application also provides a chip, comprising: an input interface, an output interface, and at least one processor, wherein the input interface, the output interface, and the at least one processor are connected via an internal connection path, and the at least one processor is configured to execute code in a memory. When the code is executed, the at least one processor is configured to execute the methods in the above examples. Optionally, the chip also includes a memory configured to store computer programs or code.

[0239] The present application also provides a processor, which is coupled to a memory and is used to execute the method and function involving the first terminal device, the second network node, or the first network node in any of the above embodiments.

[0240] The present application provides a computer program product comprising instructions. When the computer program product is run on a computer, the method of the aforementioned embodiment is implemented.

[0241] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0242] The present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0243] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0244] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0245] In the several embodiments provided in this application, the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0246] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solutions of the embodiments of the present application.

[0247] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0248] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of each method embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0249] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A random access method, characterized in that: The method comprises: receiving a first message from a second network node, the first message being used to indicate that the second network node has detected a random access request on a first physical random access channel, where the first physical random access channel is associated with a first physical beam, and the first physical beam corresponds to the first network node; A first random access response is sent in response to the first message, where the first random access response carries information of a second physical beam, and the second physical beam corresponds to the second network node.

2. The method according to claim 1, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Send a second random access response, where the second random access response carries information about the first physical beam.

4. The method according to any one of claims 1 to 3, characterized in that The first random access response includes first configuration information, and / or the second random access response includes second configuration information, The first configuration information and the second configuration information are used to transmit data.

5. The method according to claim 4, characterized in that The first random access response further includes a first validation condition for using the first configuration information, and / or the second random access response further includes a second validation condition for using the second configuration information.

6. The method according to claim 4 or 5, characterized in that The first configuration information includes at least one of the following information: The identifier of the first random access preamble, the time domain resources for data transmission, the frequency domain resources for data transmission, the configuration information of the demodulation reference signal DMRS, the timing advance TA amount or the temporary cell radio network temporary identifier TC-RNTI; The second configuration information includes at least one of the following information: The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount or TC-RNTI.

7. The method according to any one of claims 1 to 6, characterized in that The second physical beam is associated with at least one of the following reference signals: Sounding reference signal SRS, channel state information reference signal CSI-RS or synchronization signal block SSB.

8. A random access method, characterized in that: The method comprises: Determining a first physical beam, where the first physical beam corresponds to a first network node; sending a random access request via a first physical random access channel, where the first physical random access channel is associated with the first physical beam; A first random access response is received from the first network node in response to the random access request, where the first random access response carries information of a second physical beam, and the second physical beam corresponds to the second network node.

9. The method according to claim 8, characterized in that The first random access response is sent by the first network node in response to a first message, where the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

10. The method according to claim 9, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: A second random access response is received from the first network node, where the second random access response carries information about the first physical beam.

12. The method according to any one of claims 8 to 11, characterized in that The first random access response includes first configuration information, and / or the second random access response includes second configuration information, and the method further includes: Data is transmitted according to the first configuration information or the second configuration information.

13. The method according to claim 12, characterized in that The first random access response further includes a first validation condition for using the first configuration information, and / or the second random access response further includes a second validation condition for using the second configuration information, The transmitting of data according to the first configuration information or the second configuration information includes: Determining the first configuration information or the second configuration information for transmitting data according to the first validation condition and / or the second validation condition; Data is transmitted according to the determined first configuration information or the second configuration information.

14. The method according to claim 12 or 13, characterized in that The first configuration information includes at least one of the following information: The identifier of the first random access preamble, the time domain resources for data transmission, the frequency domain resources for data transmission, the configuration information of the demodulation reference signal DMRS, the timing advance TA amount or the temporary cell radio network temporary identifier TC-RNTI; The second configuration information includes at least one of the following information: The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount or TC-RNTI.

15. The method according to any one of claims 8 to 14, characterized in that The second physical beam is associated with at least one of the following reference signals: Sounding reference signal SRS, channel state information reference signal CSI-RS or synchronization signal block SSB.

16. A random access method, characterized in that: The method comprises: detecting a random access request on a first physical random access channel, the first physical random access channel being associated with a first physical beam corresponding to a first network node; A first message is sent to the first network node in response to the random access request, where the first message is used to indicate that a second network node has detected the random access request on the first physical random access channel.

17. The method according to claim 16, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

18. A random access device, characterized in that: The device comprises: a receiving unit, configured to receive a first message from a second network node, the first message being used to indicate that the second network node has detected a random access request on a first physical random access channel, where the first physical random access channel is associated with a first physical beam, and the first physical beam corresponds to the first network node; A sending unit is configured to send a first random access response in response to the first message, where the first random access response carries information of a second physical beam, and the second physical beam corresponds to the second network node.

19. The device according to claim 18, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

20. The device according to claim 18 or 19, characterized in that The sending unit is further configured to send a second random access response, where the second random access response carries information about the first physical beam.

21. The device according to any one of claims 18 to 20, characterized in that The first random access response includes first configuration information, and / or the second random access response includes second configuration information, The first configuration information and the second configuration information are used to transmit data.

22. The device according to claim 21, characterized in that The first random access response further includes a first validation condition for using the first configuration information, and / or the second random access response further includes a second validation condition for using the second configuration information.

23. The device according to claim 21 or 22, characterized in that The first configuration information includes at least one of the following information: The identifier of the first random access preamble, the time domain resources for data transmission, the frequency domain resources for data transmission, the configuration information of the demodulation reference signal DMRS, the timing advance TA amount or the temporary cell radio network temporary identifier TC-RNTI; The second configuration information includes at least one of the following information: The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount or TC-RNTI.

24. The device according to any one of claims 18 to 23, characterized in that The second physical beam is associated with at least one of the following reference signals: Sounding reference signal SRS, channel state information reference signal CSI-RS or synchronization signal block SSB.

25. A random access device, characterized in that: The device comprises: A unit is configured to determine a first physical beam, where the first physical beam corresponds to a first network node; a sending unit, configured to send a random access request through a first physical random access channel, where the first physical random access channel is associated with the first physical beam; The receiving unit is configured to receive a first random access response from the first network node in response to the random access request, where the first random access response carries information of a second physical beam, and the second physical beam corresponds to the second network node.

26. The device according to claim 25, characterized in that The first random access response is sent by the first network node in response to a first message, where the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

27. The device according to claim 26, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

28. The device according to any one of claims 25 to 27, characterized in that The receiving unit is further configured to receive a second random access response from the first network node, where the second random access response carries information about the first physical beam.

29. The device according to any one of claims 25 to 28, characterized in that The first random access response includes first configuration information, and / or the second random access response includes second configuration information, and the processing unit is further configured to transmit data according to the first configuration information or the second configuration information.

30. The device according to claim 29, characterized in that The first random access response further includes a first validation condition for using the first configuration information, and / or the second random access response further includes a second validation condition for using the second configuration information, The processing unit is further configured to transmit data according to the first configuration information or the second configuration information, including: The processing unit is further configured to determine, based on the first validation condition and / or the second validation condition, whether to use the first configuration information or the second configuration information to transmit data.

31. The device according to claim 29 or 30, characterized in that The first configuration information includes at least one of the following information: The identifier of the first random access preamble, the time domain resources for data transmission, the frequency domain resources for data transmission, the configuration information of the demodulation reference signal DMRS, the timing advance TA amount or the temporary cell radio network temporary identifier TC-RNTI; The second configuration information includes at least one of the following information: The identifier of the first random access preamble code, time domain resources for data transmission, frequency domain resources for data transmission, DMRS configuration information, TA amount or TC-RNTI.

32. The device according to any one of claims 25 to 31, characterized in that The second physical beam is associated with at least one of the following reference signals: Sounding reference signal SRS, channel state information reference signal CSI-RS or synchronization signal block SSB.

33. A random access device, characterized in that: The device comprises: a receiving unit, configured to detect a random access request on a first physical random access channel, where the first physical random access channel is associated with a first physical beam, and the first physical beam corresponds to a first network node; A sending unit is configured to send a first message to the first network node in response to the random access request, where the first message is used to indicate that the second network node has detected the random access request on the first physical random access channel.

34. The device according to claim 33, characterized in that The first message includes at least one of the following information: The information of the first physical random access channel, the first random access preamble, the time slot information when the second network node detects the random access request, the timing advance TA amount obtained by the second network node based on the detected random access request, or the reference signal received power RSRP obtained by the second network node based on the detected random access request, the first random access preamble being associated with the first physical random access channel.

35. A communication device, characterized in that: comprising at least one processor configured to, by executing computer programs or instructions, The communication device is caused to perform the method according to any one of claims 1 to 7, or the communication device is caused to perform the method according to any one of claims 8 to 15, or the communication device is caused to perform the method according to claim 16 or 17.

36. The communication device according to claim 35, characterized in that The communication device further comprises a memory for storing the computer program or instructions.

37. The communication device according to claim 35, wherein: The communication device further includes a communication interface, which is used to input and / or output signals.

38. A computer-readable storage medium, characterized in that The computer readable storage medium stores a computer program or instruction. When the computer program or instruction is executed on a computer, The method of any one of claims 1 to 7 is performed, or the method of any one of claims 8 to 15 is performed, or the method of claim 16 or 17 is performed.

39. A computer program product, characterized in that Contains instructions that, when executed on a computer, The method of any one of claims 1 to 7 is performed, or the method of any one of claims 8 to 15 is performed, or the method of claim 16 or 17 is performed.

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