Access method and communication apparatus

Abstract

An access method and a communication apparatus, which can be applied to the field of satellite communications, such as an NTN. In the method, a terminal device sends a plurality of radio resource control setup request messages, the radio resource control setup request messages corresponding to a same RNTI (i.e., a first RNTI); the terminal device performs blind detection on a PDCCH on the basis of the first RNTI, and does not need to perform blind detection on a PDCCH on the basis of a plurality of RNTIs, so that the complexity of blind detection can be reduced, and the power consumption of the terminal device can be reduced.

Description

An access method and communication device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411595002.X, filed on November 8, 2024, entitled "An Access Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to an access method and communication device. Background Technology

[0004] To improve the speed at which terminal devices access the network and thus increase the number of terminal devices connected to the network, the 3rd Generation Partnership Project (3GPP) standard discussion is considering omitting msg1 and msg2 in the random access procedure. That is, the terminal device does not send msg1 or receive msg2, but directly sends msg3 and receives msg4.

[0005] Since msg1 is not sent, the preamble carried in msg1 cannot be used to reduce contention, which increases the probability of collisions between msg3 sent by different terminal devices and reduces the success rate of terminal devices accessing the network. To improve the success rate of terminal devices accessing the network, terminal devices can be allowed to send multiple msg3s at once. As long as the network side correctly parses one of the msg3s, it can send the corresponding msg4 to the terminal device.

[0006] After the terminal device sends msg3, it blindly detects the physical downlink control channel (PDCCH) sent by the access network device based on the radio network temporary identifier (RNTI). This PDCCH is used to schedule msg4, i.e., it indicates the resource carrying msg4. After blindly detecting the PDCCH, the terminal device receives msg4 according to the resource location scheduled by the PDCCH. This PDCCH is scrambled by the RNTI, and the RNTI is related to the time-domain location of the resource carrying msg3.

[0007] In scenarios where terminal devices send multiple msg3s, how to design the scrambling method of PDCCH to reduce the power consumption of power-consuming devices remains to be solved. Summary of the Invention

[0008] This application provides an access method and communication device that can reduce the power consumption of terminal devices.

[0009] In a first aspect, embodiments of this application provide an access method that can be applied to the terminal device side. For example, the executing entity can be the terminal device or a component in the terminal device, such as a communication module in the terminal device, or a circuit or chip in the terminal device responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core or a system-in-package (SIP) chip). It can also be a logic module or software that can implement all or part of the functions of the terminal device. The method includes: sending multiple Radio Resource Control Establishment Request (RNTI) messages, the RNTI messages being used for random access; blindly detecting a PDCCH based on a first RNTI, the PDCCH being used to schedule the RNTI messages, the PDCCH being scrambled by the first RNTI; wherein the first RNTI is determined based on the starting time-domain position of the resource carrying the first RNTI message among the multiple RNTI messages; or, the first RNTI is determined based on the starting time-domain position of a random access resource group, wherein the multiple resources carrying the multiple RNTI messages all belong to the random access resource group.

[0010] Based on the above scheme, the terminal device sends multiple Radio Resource Control Establishment Request (RRC) messages, each corresponding to the same RNTI (i.e., the first RNTI). Regardless of which RRC message the access network device receives from the terminal device, it uses the first RNTI to scramble the PDCCH. The PDCCH is used to schedule the RRC message corresponding to the RRC message. The terminal device performs blind detection of the PDCCH based on the first RNTI, eliminating the need for blind detection based on multiple RNTIs, thus reducing the complexity of blind detection and consequently reducing the power consumption of the terminal device.

[0011] In one possible implementation, the starting time-domain location of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first radio resource control establishment request message.

[0012] In one possible implementation, the method further includes: receiving a first radio resource control establishment message, wherein the first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message, and the plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

[0013] Based on the above scheme, the first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resources carrying the first radio resource control establishment request message, which helps the terminal device to accurately determine whether the first radio resource control establishment message is a radio resource control establishment message sent to itself.

[0014] In one possible implementation, receiving the first radio resource control establishment message includes: receiving a first message, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0015] Based on the above scheme, radio resource control establishment messages are sent to multiple terminal devices in one message (e.g., the first message), which reduces the number of messages sent by the access network devices, thus saving the resource overhead of the access network devices and reducing air interface overhead.

[0016] In one possible implementation, the blind detection of PDCCH according to the first RNTI includes: blindly detecting PDCCH within the feedback time window corresponding to the Radio Resource Control Establishment Request message according to the first RNTI.

[0017] Based on the above scheme, the terminal device only needs to perform blind detection of PDCCH within the feedback time window corresponding to each Radio Resource Control Establishment Request message, which can reduce the complexity of blind detection and thus reduce the power consumption of the terminal device.

[0018] Secondly, embodiments of this application provide an access method that can be applied to the network side. For example, the executing entity can be an access network device on the network side, a module (e.g., a circuit, chip, or chip system) in the access network device, or a logical node, logical module, or software that can implement all or part of the functions of the access network device. The method includes: receiving a first Radio Resource Control Establishment Request (RRC) message, wherein the first RRC message is used for random access and is one of a plurality of RRC messages sent by a terminal device; sending a PDCCH, wherein the PDCCH is used to schedule the first RRC message, and the PDCCH is scrambled by a first RNTI; wherein the first RNTI is determined based on the starting time-domain position of the resource carrying the first RRC message among the plurality of RRC messages; or, the first RNTI is determined based on the starting time-domain position of a random access resource group, wherein the plurality of resources carrying the plurality of RRC messages all belong to the random access resource group.

[0019] In one possible implementation, the starting time-domain location of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first radio resource control establishment request message.

[0020] In one possible implementation, the method further includes: sending the first radio resource control establishment message, wherein the first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message.

[0021] In one possible implementation, sending the first radio resource control establishment message includes: sending a first message, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0022] In one possible implementation, sending the PDCCH includes: sending the PDCCH within the feedback time window corresponding to the first Radio Resource Control Establishment Request message.

[0023] For the beneficial effects of the second aspect and any possible implementation methods, please refer to the beneficial effects of the first aspect and the corresponding implementation methods.

[0024] Thirdly, this application provides an access method that can be applied to the terminal device side. For example, the executing entity can be the terminal device or a component within the terminal device, such as a communication module within the terminal device, or a circuit or chip responsible for communication functions within the terminal device (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core). It can also be a logic module or software capable of implementing all or part of the terminal device's functions. The method includes: sending multiple Radio Resource Control Establishment Request (RRAC) messages, the RRC messages being used for random access; blindly detecting a PDCCH within a feedback time window corresponding to the first RRC message based on a first RNTI, the PDCCH being used to schedule RRC messages, the PDCCH being scrambled by the first RNTI, the first RNTI being determined based on the starting time domain position of the resource carrying the first RRC message, the first RRC message being one of the multiple RRC messages; wherein each of the multiple RRC messages corresponds to a feedback time window.

[0025] Based on the above scheme, the terminal device sends multiple Radio Resource Control Establishment Request (RRAC) messages, each corresponding to a different RNTI. The terminal device blindly performs PDCCH detection based on the RNTI corresponding to the RRAC message, for example, blindly performing PDCCH detection based on the first RNTI corresponding to the first RRAC message. Since one PDCCH is only used to schedule the RRAC message corresponding to one RRAC message sent by the terminal device, the terminal device only needs to blindly perform PDCCH detection within the feedback time window corresponding to the RRAC message, which reduces the complexity of blind detection and thus reduces the power consumption of the terminal device.

[0026] In one possible implementation, the starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first Radio Resource Control Establishment Request message.

[0027] In one possible implementation, the method further includes: receiving a first radio resource control establishment message, wherein the first radio resource control establishment message includes an identifier of the terminal device and / or an index of the frequency domain resource carrying the first radio resource control establishment request message.

[0028] Based on the above scheme, the first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resources carrying the first radio resource control establishment request message, which helps the terminal device to accurately determine whether the first radio resource control establishment message is a radio resource control establishment message sent to itself.

[0029] In one possible implementation, receiving the first radio resource control establishment message includes: receiving a first message, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0030] Based on the above scheme, radio resource control establishment messages are sent to multiple terminal devices in one message (e.g., the first message), which reduces the number of messages sent by the access network devices, thus saving the resource overhead of the access network devices and reducing air interface overhead.

[0031] Fourthly, embodiments of this application provide an access method that can be applied to the network side. For example, the executing entity can be an access network device on the network side, a module (e.g., a circuit, chip, or chip system) within the access network device, or a logical node, logical module, or software capable of implementing all or part of the functions of the access network device. The method includes: receiving a first Radio Resource Control Establishment Request (RRAC) message, wherein the first RRC establishment request message is used for random access and is one of a plurality of RRC establishment request messages sent by a terminal device; and sending a PDCCH scrambled by a first RNTI, wherein the PDCCH is used to schedule RRC establishment messages, and the first RNTI is determined based on the starting time-domain position of the resource carrying the first RRC establishment request message.

[0032] In one possible implementation, the starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first Radio Resource Control Establishment Request message.

[0033] In one possible implementation, the method further includes: sending a first radio resource control establishment message, wherein the first radio resource control establishment message includes an identifier of the terminal device and / or an index of the frequency domain resources carrying the first radio resource control establishment request message, and the plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

[0034] In one possible implementation, sending the first radio resource control establishment message includes: sending a first message, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0035] For the beneficial effects of the fourth aspect and any possible implementation methods, please refer to the beneficial effects of the second aspect and the corresponding implementation methods.

[0036] Fifthly, this application provides a communication device that has the functions of implementing the first or third aspects described above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the first aspect. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0037] Sixthly, this application provides a communication device that has the functions of implementing the second or fourth aspects described above. For example, the communication device includes modules, units, or means corresponding to the operations involved in the second aspect described above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0038] In a seventh aspect, this application provides a communication device including an interface circuit and one or more processors. The one or more processors are coupled to a memory. The memory stores part or all of the necessary computer program or instructions for implementing the functions described in the first or third aspect. The one or more processors are executable to the computer program or instructions, which, when executed, cause the communication device to implement the methods in any possible design or implementation of the first or third aspect. The interface circuit is used to implement communication functions within the communication device and / or communication functions between the communication device and other devices or components.

[0039] In one possible design, the processor is used to communicate with other devices or components through the interface circuit.

[0040] In one possible design, the communication device may also include the memory.

[0041] The aforementioned communication device may be a terminal device, a communication module in a terminal device, or a chip in a terminal device that is responsible for communication functions, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip that contains a modem module.

[0042] Eighthly, this application provides a communication device including an interface circuit and one or more processors. The one or more processors are coupled to a memory. The memory stores part or all of the necessary computer program or instructions for implementing the functions described in the second or fourth aspect above. The one or more processors are executable to carry out the computer program or instructions, which, when executed, cause the communication device to implement the methods in any possible design or implementation of the second or fourth aspect above. The interface circuit is used to implement communication functions within the communication device and / or communication functions between the communication device and other devices or components.

[0043] The aforementioned communication device may be an access network device, a module (e.g., a circuit, chip, or chip system) within the access network device, or a logical node, logical module, or software capable of implementing all or part of the functions of the access network device.

[0044] Ninthly, this application provides a chip (or chip system) including a processor for implementing any of the possible implementation methods of the first to fourth aspects described above.

[0045] In a tenth aspect, this application provides a computer-readable storage medium storing a computer program or instructions that, when executed, implement the method in any of the possible designs of the first to fourth aspects described above.

[0046] In the eleventh aspect, this application provides a computer program product comprising a computer program or instructions that, when executed, implement the method in any of the possible designs of the first to fourth aspects described above.

[0047] In a twelfth aspect, this application provides a communication system, including a terminal device for performing any possible implementation of the first aspect described above, and an access network device for performing any possible implementation of the second aspect described above.

[0048] In a thirteenth aspect, this application provides a communication system, including a terminal device for performing any possible implementation of the third aspect above, and an access network device for performing any possible implementation of the fourth aspect above. Attached Figure Description

[0049] Figure 1 is a schematic diagram of a possible, non-limiting system;

[0050] Figure 2 is a schematic diagram of the four-step random access process;

[0051] Figure 3 is a flowchart illustrating an access method provided in an embodiment of this application;

[0052] Figure 4(a) shows an example of sending a Radio Resource Control Establishment Request message according to an embodiment of this application;

[0053] Figure 4(b) shows another example of sending a Radio Resource Control Establishment Request message according to an embodiment of this application;

[0054] Figure 5 is a flowchart illustrating an access method provided in an embodiment of this application;

[0055] Figure 6 is a possible exemplary block diagram of the communication device involved in the embodiments of this application;

[0056] Figure 7 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0057] Figure 1 is a possible, non-limiting system schematic diagram. As shown in Figure 1, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the communication system also includes an Internet 300. RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110) and at least one terminal device (120a-120j in Figure 1, collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). Terminal device 120 is wirelessly connected to RAN node 110. RAN node 110 is wirelessly or wired connected to core network 200. The core network device in core network 200 and RAN node 110 in RAN 100 can be different physical devices, or they can be the same physical device integrating core network logical functions and radio access network logical functions.

[0058] RAN100 can be a 3GPP-related cellular system, such as a 4th generation (4G), 5th generation (5G) mobile communication system, a non-terrestrial network (NTN) communication system, or a future-oriented evolution system. NTN can be a communication system integrated with 4G, 5G, or future communication systems; this application does not limit this. RAN100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. RAN100 can also be a communication system integrating two or more of the above systems.

[0059] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, constitutes part of the communication system and is used to help terminal devices achieve wireless access. Multiple RAN nodes 110 in communication system 10 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal device 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal devices 120j accessing RAN 100 through network element 120i, network element 120i is a base station; but for base station 110a, network element 120i is a terminal device. RAN node 110 and terminal device 120 are sometimes both referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functions, and network elements 120a-120j can be understood as communication devices with terminal device functions.

[0060] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node can be a macro base station (as shown in Figure 1, 110a), a micro base station or indoor station (as shown in Figure 1, 110b), a relay node or donor node, or a radio controller in a CRAN scenario. In satellite communication systems, a RAN node can be a satellite or a high altitude platform station (HAPS), or a base station device mounted on a satellite. A RAN node can also be a gateway station (or ground station, earth station, signaling station, gateway, or gateway station). Optionally, a RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). All or part of the functions of the RAN node in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (e.g., a cloud platform). The RAN node may also be equipped with communication modules, circuits, or chips that perform corresponding communication functions. The RAN node may also be configured with program instructions for performing corresponding communication functions and corresponding program instructions. The RAN node in this application can also be a logical node, logical module, or software capable of implementing all or part of the RAN node functions.

[0061] In another possible scenario, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, with different RAN nodes each implementing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be configured separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio equipment, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0062] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0063] A terminal device can be a device or module that connects to the aforementioned communication system and has corresponding communication functions. Terminal devices can also be called terminals, user equipment (UE), mobile stations, mobile terminal devices, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, transportation vehicles with wireless communication capabilities, communication modules, etc. The embodiments of this application do not limit the device form of the terminal device. Terminal devices typically contain communication modules, circuits, or chips that perform corresponding communication functions. Terminal devices can also be configured with program instructions for performing corresponding communication functions.

[0064] Terminal devices can access the network through a random access procedure. Currently, terminal devices generally access the network through a four-step random access procedure. Figure 2 is a schematic diagram of the four-step random access procedure, which includes the following steps:

[0065] Step 201: The terminal device sends message 1 (msg1) to the access network device. Correspondingly, the access network device receives message 1.

[0066] The terminal device selects and sends a random access preamble according to the system information 1 (SIB1) broadcast by the cell. The random access preamble is carried in message 1.

[0067] This message is also known as the random access request message.

[0068] In this application, the random access preamble can also be called a random access channel (RACH) preamble or preamble. For ease of explanation, it will be referred to as preamble from now on. This will be explained uniformly here and will not be repeated later.

[0069] Step 202: The access network device sends message 2 (msg2) to the terminal device. Correspondingly, the terminal device receives message 2.

[0070] After detecting the preamble sent by the terminal device, the access network device sends message 2 to the terminal device. Message 2 includes one or more of the following information: the identifier of the detected preamble, the timing advance (TA) command, the cell-radio network temporary identifier (C-RNTI), or the uplink grant (UL grant) for transmission on the physical uplink shared channel (PUSCH).

[0071] This message 2 is also known as the random access response message.

[0072] In this context, message 2 is scheduled by the PDCCH. That is, before sending message 2, the access network device first sends a PDCCH, which indicates the resource carrying message 2. After blindly detecting the PDCCH, the terminal device receives message 2 according to the resource location scheduled by the PDCCH. This PDCCH is scrambled with a Radio Access Radio Network Temporary Identifier (RA-RNTI), which is determined based on the starting radio frame number of the resource carrying message 1 sent by the terminal device. For example, RA-RNTI = 1 + floor(SFN_id / 4), where SFN_id is the starting radio frame number of the resource carrying message 1, and floor represents rounding down.

[0073] Step 203: The terminal device sends message 3 (msg3) to the access network device. Correspondingly, the access network device receives message 3.

[0074] After receiving message 2, the terminal device sends message 3 to the access network device on the resource indicated by the UL grant, that is, it transmits message 3 on the PUSCH. Message 3 includes a contention resolution identifier.

[0075] This message 3 is also known as the Radio Resource Control Setup Request (RRCSetupRequest) message.

[0076] Step 204: The access network device sends message 4 (message4, msg4) to the terminal device. Correspondingly, the terminal device receives message 4.

[0077] After receiving message 3, the access network device sends message 4 to the terminal device, which includes a contention resolution identifier.

[0078] After receiving message 4, the terminal device checks whether the contention resolution identifier in message 4 is the same as the contention resolution identifier sent by the terminal device in message 3. If they are the same, the terminal device considers the contention resolved and the access successful; if they are different, the terminal device considers the contention failed and can re-initiate the random access procedure.

[0079] This message 4 is also known as the Radio Resource Control Setup (RRCSetup) message.

[0080] The above is a brief overview of the four-step random access process.

[0081] To improve the speed at which terminal devices access the network and thus increase the number of terminal devices connected to the network, we are currently considering omitting msg1 and msg2 in the random access process. That is, the terminal device will not send msg1 or receive msg2, but will directly send msg3 and receive msg4.

[0082] Since msg1 is not sent, the preamble carried in msg1 cannot be used to reduce contention, which increases the probability of collisions between msg3 sent by different terminal devices and reduces the success rate of terminal devices accessing the network. To improve the success rate of terminal devices accessing the network, terminal devices can be allowed to send multiple msg3s at once. As long as the network side correctly parses one of the msg3s, it can send the corresponding msg4 to the terminal device.

[0083] After the terminal device sends msg3, it blindly detects the PDCCH sent by the access network device according to the RNTI. This PDCCH indicates the resource carrying msg4. After blindly detecting the PDCCH, the terminal device receives msg4 according to the resource location scheduled by the PDCCH. This PDCCH is scrambled by the RNTI, and the RNTI is related to the time-domain location of the resource carrying msg3.

[0084] However, when a terminal device sends multiple msg3s, these msg3s may be carried on different time-domain resources. Therefore, the terminal device needs to use the RNTIs corresponding to each of the multiple msg3s for blind detection of the PDCCH. Furthermore, since the terminal device does not know which msg3 the access network device has correctly parsed, it needs to attempt to blindly detect the PDCCH sequentially using the RNTIs corresponding to each of the sent msg3s. This results in high blind detection complexity for the terminal device and increases its power consumption. How to design the PDCCH scrambling method to reduce the power consumption of the terminal device remains to be solved.

[0085] To address the aforementioned issues, this application provides corresponding solutions.

[0086] The access method and communication device are described below with reference to the accompanying drawings. It is understood that this application uses access network equipment and terminal equipment as examples of the entities executing the interaction, but this application does not limit the entities executing the interaction. For example, the method executed by the access network equipment in this application can also be implemented by modules (e.g., circuits, chips, or chip systems) within the access network equipment, or by logic nodes, logic modules, or software capable of implementing all or part of the functions of the access network equipment; similarly, the method executed by the terminal equipment in this application can also be implemented by components within the terminal equipment, such as communication modules applicable to the terminal equipment or circuits or chips responsible for communication functions within the terminal equipment (e.g., modem chips (also known as baseband chips), or SoC chips containing modem cores, or SIP chips), or by logic modules or software capable of implementing all or part of the functions of the terminal equipment.

[0087] Figure 3 is a flowchart illustrating an access method provided in an embodiment of this application. The method includes the following steps:

[0088] Step 301: The terminal device sends multiple Radio Resource Control Establishment Request messages.

[0089] Each of these multiple Radio Resource Control Establishment Request messages is used for random access.

[0090] The Radio Resource Control Establishment Request message can be the existing msg3, with added functionality for random access. Alternatively, the Radio Resource Control Establishment Request message can be a newly defined message that can be used for random access.

[0091] The Radio Resource Control Establishment Request message may be replaced with other names in future communications, and this application does not limit it.

[0092] Step 302: The access network device receives the first radio resource control establishment request message.

[0093] The first radio resource control establishment request message is one of a plurality of radio resource control establishment request messages sent by the terminal device.

[0094] Although a terminal device sends multiple Radio Resource Control Establishment Request (RRAC) messages, the access network device may not receive all of them. This is because: firstly, while one terminal device is sending an RRC, other terminal devices may also be sending RRC, causing conflicts when different terminal devices send RRC on the same time-frequency resource, preventing the access network device from successfully receiving conflicting RRC, and secondly, once the access network device successfully receives a RRC from a terminal device, it can send a PDCCH to the terminal device. The PDCCH is used to schedule the RRC corresponding to that RRC and to send RRCs scheduled by the PDCCH to the terminal device. The access network device does not need to continue receiving other RRCs from the terminal device, thus saving power consumption.

[0095] Step 302 is illustrated using the example of the access network device successfully receiving the first Radio Resource Control Establishment Request message from among multiple Radio Resource Control Establishment Request messages sent by the terminal device.

[0096] Step 303: The access network device sends a PDCCH to the terminal device.

[0097] The PDCCH is used to schedule the first radio resource control establishment message, which is a feedback message of the first radio resource control establishment request message.

[0098] In this application, the Radio Resource Control (RRC) Establishment message can be the existing msg4, with the addition of a function to respond to random access. Alternatively, the RRC Establishment message can be a newly defined message that can be used to respond to random access.

[0099] The radio resource control establishment message may be replaced with other names in future communications, and this application does not limit it.

[0100] The PDCCH is scrambled with the first RNTI. Furthermore, in this embodiment, regardless of which of the multiple Radio Resource Control Establishment Request (RRAC) messages successfully received by the access network device from the terminal device, the same RNTI (i.e., the first RNTI) is used to scramble the PDCCH. For example, if the terminal device sends RRAC message #1 in time period #1, RRAC message #2 in time period #2, and RRAC message #3 in time period #3, and the access network device successfully receives RRAC message #1, it sends a PDCCH to the terminal device. This PDCCH is scrambled with the first RNTI and is used to schedule the RRAC establishment message corresponding to RRAC message #1. If the access network device successfully receives RRAC message #2, it sends a PDCCH to the terminal device. This PDCCH is also scrambled with the first RNTI and is used to schedule the RRAC establishment message corresponding to RRAC message #2. If the access network device successfully receives the Radio Resource Control Establishment Request message #3, it sends a PDCCH to the terminal device. This PDCCH is also scrambled by the first RNTI, and it is used to schedule the Radio Resource Control Establishment message corresponding to the Radio Resource Control Establishment Request message #3.

[0101] For example, two different implementations of the first RNTI are described below.

[0102] In the first implementation method, the first RNTI is determined based on the starting time domain position of the resource in the first Radio Resource Control Establishment Request message among the multiple Radio Resource Control Establishment Request messages sent by the bearer terminal device.

[0103] The first Radio Resource Control Establishment Request message here refers to the earliest Radio Resource Control Establishment Request message among the multiple Radio Resource Control Establishment Request messages sent by the terminal device within a cycle.

[0104] Referring to the example shown in Figure 4(a), each rectangular square in the figure represents a resource carrying a Radio Resource Control Establishment Request (RROR) message. This application does not limit the size of the resource in the time domain or frequency domain. In the example of Figure 4(a), terminal device #1 sends 4 RRROR messages, and terminal device #2 sends 5 RRROR messages. The first RRROR message sent by terminal device #1 and the second RRROR message sent by terminal device #2 are carried on the same resource, that is, a resource conflict occurs. The access network device will not be able to successfully receive the RRROR messages with resource conflicts, that is, it will not be able to successfully receive the first RRROR message sent by terminal device #1 and the second RRROR message sent by terminal device #2.

[0105] For this example, regardless of which of the four Radio Resource Establishment Request (RROP) messages sent by Terminal Device #1 is successfully received by the access network device, the same first RNTI is used for scrambling when sending PDCCH to Terminal Device #1. This first RNTI is determined based on the starting time-domain position of the resource in the first ROP message among the four ROP messages sent by Terminal Device #1. This starting time-domain position can be the starting radio frame number, starting radio subframe number, or starting timeslot number of the resource in the first ROP message sent by Terminal Device #1. For example, the first RNTI = 1 + floor(X / K) + Offset. Here, X is the starting time-domain position of the resource in the first ROP message among the four ROP messages sent by Terminal Device #1, K is an integer greater than or equal to 2 (e.g., K = 4), and Offset is the carrier index of the resource used to carry the ROP message.

[0106] For this example, regardless of which of the five Radio Resource Establishment Request (RROP) messages sent by Terminal Device #2 is successfully received by the access network device, the same first RNTI is used for scrambling when sending PDCCH to Terminal Device #2. This first RNTI is determined based on the starting time-domain position of the resource in the first of the five RROP messages sent by Terminal Device #2. This starting time-domain position can be the starting radio frame number, starting radio subframe number, or starting timeslot number of the resource in the first RROP message sent by Terminal Device #2. For example, the first RNTI = 1 + floor(X / K) + Offset. Here, X is the starting time-domain position of the resource in the first of the five RROP messages sent by Terminal Device #2, K is an integer greater than or equal to 2 (e.g., K = 4), and Offset is the carrier index of the resource used to carry the RROP message.

[0107] In this implementation method, when a PDCCH is scrambled, the terminal device carries the starting time domain position of the resource carrying the first radio resource control establishment request message in each radio resource control establishment request message it sends. Thus, regardless of which radio resource control establishment request message the access network device successfully receives, it can obtain the starting time domain position of the resource carrying the first radio resource control establishment request message from that radio resource control establishment request message, and then calculate the first RNTI used for scrambling the PDCCH.

[0108] In the second implementation method, the first RNTI is determined based on the starting time domain position of the random access resource group, and the multiple resources of the multiple radio resource control establishment request messages sent by the carrying terminal device all belong to the random access resource group.

[0109] Based on this second implementation method, the network pre-assigns a random access resource group for the terminal device to send a Radio Resource Control Establishment Request (RRAC) message. The terminal device can select a resource from the random access resource group and use that resource to send the RAC message. This random access resource group can be a periodic resource. Different terminal devices can be configured with the same random access resource group or different random access resource groups.

[0110] Referring to the example shown in Figure 4(b), each rectangular square in the figure represents a resource carrying a Radio Resource Control Establishment Request (RROR) message. This application does not limit the size of this resource in the time and frequency domains. In the example in Figure 4(b), terminal device #1 sends four RRROR messages, and terminal device #2 sends five RRROR messages. The first RRROR message sent by terminal device #1 and the second RRROR message sent by terminal device #2 are carried on the same resource, i.e., a resource conflict occurs. The access network device will be unable to successfully receive the conflicting RRROR messages, that is, it will be unable to successfully receive the first RRROR message sent by terminal device #1 and the second RRROR message sent by terminal device #2. Assume that all the resources shown in the figure constitute a random access resource group, and both terminal device #1 and terminal device #2 are configured with this random access resource group.

[0111] In this example, regardless of which of the four Radio Resource Establishment Request (RROP) messages sent by Terminal Device #1 is successfully received by the access network device, the same first RNTI is used for scrambling when sending the PDCCH to Terminal Device #1. This first RNTI is determined based on the starting time-domain position of the random access resource group. The starting time-domain position can be the starting radio frame number, starting radio subframe number, or starting timeslot number of the random access resource group. For example, the first RNTI = 1 + floor(X / K) + Offset. Here, X is the starting time-domain position of the random access resource group, K is an integer greater than or equal to 2 (e.g., K = 4), and Offset is the carrier index of the resource used to carry the ROP message.

[0112] For this example, regardless of which of the five Radio Resource Establishment Request (RROP) messages sent by Terminal Device #2 is successfully received by the access network device, the same first RNTI is used for scrambling when sending PDCCH to Terminal Device #2. This first RNTI is determined based on the starting time-domain position of the random access resource group. The starting time-domain position can be the starting radio frame number, starting radio subframe number, or starting timeslot number of the random access resource group. For example, the first RNTI = 1 + floor(X / K) + Offset. Here, X is the starting time-domain position of the random access resource group, K is an integer greater than or equal to 2 (e.g., K = 4), and Offset is the carrier index of the resource used to carry the ROP message.

[0113] In this example, since terminal device #1 and terminal device #2 use the same random access resource group to send radio resource control establishment request messages, the RNTI they use is also the same.

[0114] In this implementation method, when the PDCCH is scrambled using this second method, the terminal device does not need to carry the starting time domain position of the random access resource group in each Radio Resource Control Establishment Request message it sends. This is because the random access resource group is allocated by the network side, and therefore the access network device can know the starting time domain position of the random access resource group. Based on this method, since the terminal device does not need to carry the starting time domain position of the random access resource group in each Radio Resource Control Establishment Request message it sends, the overhead of the terminal device sending Radio Resource Control Establishment Requests can be reduced.

[0115] Step 304: The terminal device performs a blind PDCCH check based on the first RNTI.

[0116] In this application, blind inspection can also be referred to as testing, etc., which will be explained uniformly here and will not be elaborated on later.

[0117] The first RNTI is the RNTI used to scramble the PDCCH, and the multiple Radio Resource Control Establishment Request messages sent by the terminal device all correspond to the same RNTI. That is, no matter which Radio Resource Control Establishment Request message the terminal device sends, the first RNTI is used to blindly detect the PDCCH.

[0118] Based on the above scheme, the terminal device sends multiple Radio Resource Control Establishment Request (RRC) messages, each corresponding to the same RNTI (i.e., the first RNTI). Regardless of which RRC message the access network device receives from the terminal device, it uses the first RNTI to scramble the PDCCH. The PDCCH is used to schedule the RRC message corresponding to the RRC message. The terminal device performs blind detection of the PDCCH based on the first RNTI, eliminating the need for blind detection based on multiple RNTIs, thus reducing the complexity of blind detection and consequently reducing the power consumption of the terminal device.

[0119] As one possible implementation, after sending multiple Radio Resource Control Establishment Request (RRC) messages, the terminal device can perform blind PDCCH detection within the feedback time window corresponding to each RRC message, based on the first RNTI. That is, each RRC message sent corresponds to a feedback time window, and RRC messages sent by the terminal device at different times correspond to different feedback time windows. The terminal device only performs blind PDCCH detection within the feedback time window corresponding to the RRC message. If the feedback time window for that RRC message is exceeded, the PDCCH corresponding to that RRC message is no longer blindly detected. Based on this method, a PDCCH is only used to schedule the RRC message corresponding to one RRC message sent by the terminal device. The terminal device only needs to perform blind PDCCH detection within the feedback time window corresponding to the RRC message, which reduces the complexity of blind detection.

[0120] Figure 5 is a flowchart illustrating an access method provided in an embodiment of this application. The method includes the following steps:

[0121] Step 501: The terminal device sends multiple Radio Resource Control Establishment Request messages.

[0122] Each of these multiple Radio Resource Control Establishment Request messages is used for random access.

[0123] The Radio Resource Control Establishment Request message can be the existing msg3, with added functionality for random access. Alternatively, the Radio Resource Control Establishment Request message can be a newly defined message that can be used for random access.

[0124] The Radio Resource Control Establishment Request message may be replaced with other names in future communications, and this application does not limit it.

[0125] Step 502: The access network device receives the first radio resource control establishment request message.

[0126] The first radio resource control establishment request message is one of a plurality of radio resource control establishment request messages sent by the terminal device.

[0127] Although a terminal device sends multiple Radio Resource Control Establishment Request (RRAC) messages, the access network device may not receive all of them. This is because: firstly, while one terminal device is sending an RRC, other terminal devices may also be sending RRC, causing conflicts when different terminal devices send RRC on the same time-frequency resource, preventing the access network device from successfully receiving conflicting RRC, and secondly, once the access network device successfully receives a RRC from a terminal device, it can send a PDCCH to the terminal device. The PDCCH is used to schedule the RRC corresponding to that RRC and to send RRCs scheduled by the PDCCH to the terminal device. The access network device does not need to continue receiving other RRCs from the terminal device, thus saving power consumption.

[0128] Step 502 is illustrated using the example of the access network device successfully receiving the first Radio Resource Control Establishment Request message from among multiple Radio Resource Control Establishment Request messages sent by the terminal device.

[0129] Step 503: The access network device sends a PDCCH to the terminal device.

[0130] The PDCCH is used to schedule the first radio resource control establishment message, which is a feedback message of the first radio resource control establishment request message.

[0131] In this application, the Radio Resource Control (RRC) Establishment message can be the existing msg4, with the addition of a function to respond to random access. Alternatively, the RRC Establishment message can be a newly defined message that can be used to respond to random access.

[0132] The radio resource control establishment message may be replaced with other names in future communications, and this application does not limit it.

[0133] The PDCCH is scrambled by a first RNTI. Furthermore, in this embodiment, each of the multiple Radio Resource Control Establishment Request (RROP) messages sent by the terminal device corresponds to a separate RNTI. That is, if the access network device successfully receives different RROP messages sent by the terminal device, it will use different RNTIs to scramble the PDCCH. For example, if the access network device receives the first RROP message sent by the terminal device, it will scramble the PDCCH using the first RNTI. If the access network device receives other RROP messages sent by the terminal device, it will scramble the PDCCH using a different RNTI than the first RNTI. For example, the terminal device sends RROP message #1 in time period #1, RROP message #2 in time period #2, and RROP message #3 in time period #3. If the access network device successfully receives RROP message #1, it sends a PDCCH to the terminal device. This PDCCH is scrambled by RNTI #1, and this PDCCH is used to schedule the RROP message corresponding to RROP message #1. If the access network device successfully receives Radio Resource Control Establishment Request Message #2, it sends a PDCCH to the terminal device. This PDCCH is also scrambled with RNTI #2, and it is used to schedule the Radio Resource Control Establishment Message corresponding to Radio Resource Control Establishment Request Message #2. If the access network device successfully receives Radio Resource Control Establishment Request Message #3, it sends a PDCCH to the terminal device. This PDCCH is also scrambled with RNTI #3, and it is used to schedule the Radio Resource Control Establishment Message corresponding to Radio Resource Control Establishment Request Message #3. RNTI #1, RNTI #2, and RNTI #3 are all different from each other.

[0134] As one implementation method, for each Radio Resource Control Establishment Request (RNTI) message sent by the terminal device, the RNTI corresponding to the RNTI message is determined based on the starting time-domain position of the resource carrying the RNTI message. This starting time-domain position can be the starting radio frame number, starting radio subframe number, or starting timeslot number of the resource carrying the RNTI message. For example, RNTI = 1 + floor(X / K) + Offset. Here, X is the starting time-domain position of the resource carrying the RNTI message, K is an integer greater than or equal to 2 (e.g., K = 4), and Offset is the carrier index of the resource carrying the RNTI message.

[0135] Step 504: The terminal device performs a blind detection of the PDCCH within the feedback time window corresponding to the first Radio Resource Control Establishment Request message, based on the first RNTI.

[0136] The first RNTI is the RNTI used to scramble the PDCCH.

[0137] The terminal device not only performs blind PDCCH detection within the feedback time window corresponding to the first Radio Resource Control Establishment Request message based on the first RNTI, but also performs blind PDCCH detection within the feedback time windows corresponding to other transmitted Radio Resource Control Establishment Request messages based on other RNTIs. For example, if the terminal device transmits Radio Resource Control Establishment Request message #1 in time period #1, Radio Resource Control Establishment Request message #2 in time period #2, and Radio Resource Control Establishment Request message #3 in time period #3, then the terminal device performs blind PDCCH detection within the feedback time window #1 corresponding to Radio Resource Control Establishment Request message #1 based on RNTI #1, and the PDCCH is scrambled by RNTI #1; performs blind PDCCH detection within the feedback time window #2 corresponding to Radio Resource Control Establishment Request message #2 based on RNTI #2, and the PDCCH is scrambled by RNTI #2; and performs blind PDCCH detection within the feedback time window #3 corresponding to Radio Resource Control Establishment Request message #3 based on RNTI #3, and the PDCCH is scrambled by RNTI #3. Since the access network device only sends one PDCCH, the blind detection can be stopped once the terminal device successfully detects the PDCCH, thus reducing the overhead of the terminal device. For example, after the terminal device sends Radio Resource Control Establishment Request Message #1, Radio Resource Control Establishment Request Message #2, and Radio Resource Control Establishment Request Message #3, it blindly detects the PDCCH within the feedback time window #1 according to RNTI #1. If no PDCCH is detected, it continues to blindly detect the PDCCH within the feedback time window #2 according to RNTI #2. If the PDCCH scrambled by RNTI #2 is successfully detected, the blind detection of the PDCCH stops, meaning there is no need to blindly detect the PDCCH according to RNTI #3.

[0138] Based on the above scheme, the terminal device sends multiple Radio Resource Control Establishment Request (RRAC) messages, each corresponding to a different RNTI. The terminal device blindly performs PDCCH detection based on the RNTI corresponding to the RRAC message, for example, blindly performing PDCCH detection based on the first RNTI corresponding to the first RRAC message. Since one PDCCH is only used to schedule the RRAC message corresponding to one RRAC message sent by the terminal device, the terminal device only needs to blindly perform PDCCH detection within the feedback time window corresponding to the RRAC message, which reduces the complexity of blind detection and thus reduces the power consumption of the terminal device.

[0139] As one implementation method, for the embodiments corresponding to Figure 3 or Figure 5 above, the information such as the maximum number of radio resource control establishment request messages that the terminal device can send in one cycle can be defined by the protocol or configured on the network side.

[0140] For example, the network side or protocol can be configured with one or more of the following information:

[0141] (1) The maximum number of times (denoted by M) a radio resource control establishment request message is sent within a period.

[0142] (2) The maximum number of Radio Resource Control Establishment Request messages sent per cycle (denoted by N).

[0143] According to (1) and (2), the maximum number of radio resource control establishment request messages sent in one cycle is equal to M*N.

[0144] (3) The period of sending Radio Resource Control Establishment Request messages.

[0145] The period size defines the time range within which the terminal device sends a Radio Resource Control Establishment Request message within a single period.

[0146] (4) The modulation order (MO) of the radio resource control establishment request message.

[0147] As one implementation method, in the embodiments corresponding to Figures 3 or 5 above, after sending the PDCCH, the access network device also sends a first radio resource control establishment message to the terminal device. The resource carrying the first radio resource control establishment message is indicated by the PDCCH, that is, the PDCCH is used to schedule the first radio resource control establishment message. After blindly detecting the PDCCH, the terminal device receives the first radio resource control establishment message according to the resource location indicated by the PDCCH. For example, when the terminal device receives the first radio resource control establishment message, it first determines whether the first radio resource control establishment message contains the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message. If the first radio resource control establishment message contains the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message, the terminal device determines that the first radio resource control establishment request message is sent to itself, and therefore obtains relevant feedback information from the first radio resource control establishment request message.

[0148] As one implementation method, for the embodiments corresponding to Figures 3 or 5 above, when the access network device successfully receives Radio Resource Control Establishment Request (RRC) messages sent by different terminal devices, the RRC messages corresponding to the RRC messages sent by different terminal devices can be merged and sent together. This reduces the number of RRC messages sent, thereby reducing resource overhead. For example, if the access network device receives a first RRC message sent by a terminal device and a second RRC message sent by another terminal device, it sends a PDCCH. The PDCCH is used to schedule a first message (also called a third RRC message). The first message includes a first RRC message and a second RRC message. The first RRC message corresponds to the first RRC message, and the second RRC message corresponds to the second RRC message. The first radio resource control (RRC) establishment message contains the identifier of the terminal device and / or the index of the frequency domain resources carrying the first RRC establishment request message. The second RRC establishment message contains the identifier of the other terminal device and / or the index of the frequency domain resources carrying the second RRC establishment request message sent by the other terminal device. For example, taking the example of Figure 4(a), when the access network device successfully receives RRC establishment request messages sent by different terminal devices in the same time domain but different frequency domains, it can merge and send the RRC establishment messages corresponding to the RRC establishment request messages sent by the different terminal devices. For example, if the second Radio Resource Control Establishment Request (RRC) message sent by terminal device #1 and the third RRC message sent by terminal device #2 are located in the same time domain resource but in different frequency domain resources, then after the access network device receives the second RRC message sent by terminal device #1 and the third RRC message sent by terminal device #2, it can send a PDCCH. This PDCCH schedules a first message, which includes the RRC message corresponding to the second RRC message sent by terminal device #1 and the RRC message corresponding to the third RRC message sent by terminal device #2. For example, taking the example in Figure 4(b), when the access network device successfully receives RRC messages sent by different terminal devices on the same access resource group, it can merge and send the RRC messages corresponding to the RRC messages sent by different terminal devices.For example, after the access network device receives the third Radio Resource Control Establishment Request message sent by terminal device #1 and the third Radio Resource Control Establishment Request message sent by terminal device #2, it can send a PDCCH. The PDCCH schedules a first message, which includes the Radio Resource Control Establishment message corresponding to the third Radio Resource Control Establishment Request message sent by terminal device #1 and the Radio Resource Control Establishment message corresponding to the third Radio Resource Control Establishment Request message sent by terminal device #2.

[0149] Figure 6 illustrates a possible exemplary block diagram of the communication device involved in the embodiments of this application. As shown in Figure 6, the communication device 600 may include modules or units for implementing the methods described above. In one possible design, the communication device 600 includes a processing unit 602 and a communication unit 603. Optionally, the communication device 600 may further include a storage unit 601 for storing device program code and / or data.

[0150] The communication device 600 can be a terminal device-side device in the above embodiments, such as a terminal device or a component in a terminal device, like a communication module that can be applied to a terminal device, or a circuit or chip in a terminal device that is responsible for communication functions.

[0151] For example, in one embodiment, processing unit 602 is configured to send multiple Radio Resource Control Establishment Request (RRC) messages via communication unit 603, the RRC messages being used for random access; processing unit 602 is also configured to perform blind detection of PDCCH based on a first RNTI, the PDCCH being used to schedule RRC messages, the PDCCH being scrambled by the first RNTI; wherein, the first RNTI is determined based on the starting time domain position of the resource carrying the first RRC message among the multiple RRC messages; or, the first RNTI is determined based on the starting time domain position of a random access resource group, where the multiple resources carrying the multiple RRC messages all belong to the random access resource group.

[0152] In one possible implementation, the starting time-domain location of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first radio resource control establishment request message.

[0153] In one possible implementation, the processing unit 602 is further configured to receive a first radio resource control establishment message via the communication unit 603. The first radio resource control establishment message includes an identifier of the terminal device and / or an index of the frequency domain resources carrying the first radio resource control establishment request message. The plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

[0154] In one possible implementation, the processing unit 602 is configured to receive a first radio resource control establishment message via the communication unit 603, including: receiving a first message via the communication unit 603, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0155] In one possible implementation, the processing unit 602 is configured to blindly detect the PDCCH according to the first RNTI, including: blindly detecting the PDCCH within the feedback time window corresponding to the Radio Resource Control Establishment Request message according to the first RNTI.

[0156] For example, in another embodiment, processing unit 602 is configured to send multiple Radio Resource Control Establishment Request (RRC) messages via communication unit 603, the RRC messages being used for random access; processing unit 602 is further configured to blindly detect PDCCH within a feedback time window corresponding to the first RRC message based on a first RNTI, the PDCCH being used to schedule RRC messages, the PDCCH being scrambled by the first RNTI, the first RNTI being determined based on the starting time domain position of the resource carrying the first RRC message, the first RRC message being one of the multiple RRC messages; wherein each of the multiple RRC messages corresponds to a feedback time window.

[0157] In one possible implementation, the starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first Radio Resource Control Establishment Request message.

[0158] In one possible implementation, the processing unit 602 is further configured to receive a first radio resource control establishment message via the communication unit 603, the first radio resource control establishment message including the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message.

[0159] In one possible implementation, the processing unit 602 is configured to receive a first radio resource control establishment message via the communication unit 603, including: receiving a first message via the communication unit 603, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0160] In one possible design, when the communication device 600 is a terminal device or a communication module within a terminal device, the function of the processing unit 602 can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) chip or a SIP chip containing a modem core. The function of the communication unit 603 can be implemented by transceiver circuitry.

[0161] In one possible design, when the communication device 600 is a circuit or chip responsible for communication functions in a terminal device, such as a modem chip or a system-on-a-chip (SoC) or SIP chip containing a modem core, the function of the processing unit 602 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores. The function of the communication unit 603 can be implemented by an interface circuit or data transceiver circuit on the aforementioned chip.

[0162] The communication device 600 can also be a network-side device in the above embodiments, such as a network-side access network device, a module (e.g., circuit, chip or chip system) in the access network device, or a logic node, logic module or software that can implement all or part of the functions of the access network device.

[0163] For example, in one embodiment, processing unit 602 is configured to receive a first radio resource control establishment request message via communication unit 603. The first radio resource control establishment request message is used for random access and is one of a plurality of radio resource control establishment request messages sent by the terminal device. Processing unit 602 is further configured to send a PDCCH via communication unit 603. The PDCCH is used to schedule the first radio resource control establishment message and is scrambled by a first RNTI. The first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages; or, the first RNTI is determined based on the starting time domain position of a random access resource group, wherein the plurality of resources carrying the plurality of radio resource control establishment request messages all belong to the random access resource group.

[0164] In one possible implementation, the starting time-domain location of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first radio resource control establishment request message.

[0165] In one possible implementation, the device is further configured to send the first radio resource control establishment message via the communication unit 603. The first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message.

[0166] In one possible implementation, the processing unit 602 is configured to send a first radio resource control establishment message via the communication unit 603, including: sending a first message via the communication unit 603, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0167] In one possible implementation, the processing unit 602 is configured to send a PDCCH via the communication unit 603, including: sending the PDCCH via the communication unit 603 within the feedback time window corresponding to the first radio resource control establishment request message.

[0168] For example, in another embodiment, processing unit 602 is configured to receive a first radio resource control establishment request message via communication unit 603. The first radio resource control establishment request message is used for random access and is one of a plurality of radio resource control establishment request messages sent by the terminal device. Processing unit 602 is also configured to send a PDCCH scrambled by a first RNTI via communication unit 603. The PDCCH is used to schedule radio resource control establishment messages. The first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message.

[0169] In one possible implementation, the starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message includes one or more of the following: the starting radio frame number, the starting radio subframe number, or the starting timeslot number of the resource carrying the first Radio Resource Control Establishment Request message.

[0170] In one possible implementation, the processing unit 602 is further configured to send a first radio resource control establishment message via the communication unit 603. The first radio resource control establishment message includes an identifier of the terminal device and / or an index of the frequency domain resources carrying the first radio resource control establishment request message. The plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

[0171] In one possible implementation, the processing unit 602 is configured to send a first radio resource control establishment message via the communication unit 603, including: sending a first message via the communication unit 603, the first message including the first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal device.

[0172] It is understood that the division of units in the above-described device is merely a logical functional division. One function can correspond to one functional unit, or two or more functions can be integrated into one functional unit. In actual implementation, all or some units can be integrated onto a single physical entity, or distributed across different physical entities. Furthermore, the aforementioned functional units can be implemented in hardware, software, or a combination of both. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for specific applications, but such implementations should not be considered beyond the scope of this application.

[0173] In one example, the functional unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, such as: one or more application-specific integrated circuits (ASICs), or one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0174] In one example, storage unit 601 may include random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory and / or registers, etc.

[0175] Figure 7 is a schematic diagram of the structure of a terminal device 700 provided in an embodiment of this application. This terminal device 700 corresponds to the terminal device shown in Figure 1 and is used to implement the operation of the terminal device in the above embodiments. As shown in Figure 7, the terminal device includes: one or more antennas 710, a radio frequency processing system 720, and a processor system 730.

[0176] In the downlink or sidelink direction, the RF processing system 720 receives RF signals through the antenna 710 and sends the RF-processed signals to the processor system 730 for further processing. In the uplink or sidelink direction, the processor system 730 processes the information from the terminal device side and sends it to the RF processing system 720, which then processes the signal and transmits it through the antenna 710.

[0177] In one example, the radio frequency (RF) processing system 720 serves as the communication interface for external communication of the terminal device and may include a radio frequency frontend (RFFE) 721 and an RF transceiver 722. The RFFE 721 is primarily used for one or more processing operations, such as shaping, passband selection, or gain adjustment, on the RF signals received by the antenna or those to be transmitted through the antenna. It may include one or more components such as RF switches, duplexers, filters, power amplifiers, antenna tuners, and low-noise amplifiers. The RFFE 721 can be a circuit system composed of multiple discrete components or integrated into one or more chips. The RF transceiver 722 processes the RF signals received by the RFFE into baseband / IF signals for further processing by the processor system 730, and processes the baseband / IF signals provided by the processor system 730 into RF signals for transmission to the RFFE 721. The baseband / IF signals transmitted between the RF transceiver 722 and the processor system 730 can be digital or analog signals. The RF transceiver 722 can be implemented by one or more chips, which are commonly referred to as RF ICs.

[0178] In one example, the processor system 730 may include one or more processors for processing signals and executing one or more communication protocols. Optionally, the processor system 730 may also include a memory 736. In one example, the one or more processors include at least one baseband processor 731 (also known as a modem processor). The memory 736 is used to store data and / or computer program instructions. Optionally, the processor system 730 may also include one or more application processors 732 for implementing processing of the terminal device's operating system and application layer. Optionally, the processor system 730 may also include one or more of a voice subsystem 733, a multimedia subsystem 734, or an interface circuit 735. The voice subsystem 733 is used to process voice signals, the multimedia subsystem 734 is used to handle multimedia-related operations, such as video encoding / decoding, image processing, etc., and the interface circuit 735 is used to enable communication with other terminal device components, such as a display 740, an input device 750, a memory 760, etc. The above-mentioned components in the processor system 730 can communicate with each other via a bus or communication interface circuit.

[0179] In one example, the processor system 730 can be packaged as a single processor chip, such as a SoC chip or a SIP chip. In another example, the processor system 730 can be a system composed of multiple chips; for example, the baseband processor 731 can be packaged as a single chip, or packaged with part or all of the circuitry of the radio frequency processing system into a single chip.

[0180] In one example, memory 736 can be on-chip memory, i.e., located on the processor system 730 chip. In another example, memory 760 can be off-chip memory, i.e. located outside the processor system 730 chip.

[0181] In one example, the baseband processor 731 may include one or more processor cores 7311 and interface circuitry 7314. The one or more processor cores 7311 are used to process signals and execute one or more communication protocols. Optionally, the baseband processor 731 may also include a memory 7312 for storing at least a portion of the corresponding computer program instructions and / or data. In one example, the one or more processor cores 7311 execute the computer program instructions stored in the memory 7312 to implement the relevant operations in the above method embodiments. In this disclosure, the memory 7312 storing the corresponding computer program instructions and / or data may mean that the memory 7312 stores all the corresponding computer program instructions and / or data for the processor core 7311 to execute; or it may mean that the memory 7312 stores a portion of the corresponding computer program instructions and / or data, which includes the computer program instructions and / or data currently needed to be executed by the processor core 7311. The memory 7312 can store different portions of computer program instructions and / or data multiple times for the processor core 7311 to execute in order to implement the relevant operations in the above method embodiments. Interface circuit 7314 serves as a communication interface for communication with other components, such as transmitting signals with RF processing system 720, communicating with other subsystems and related components of processor system 730 via bus, such as transmitting data control signals with application processor 732, and transmitting data or computer program instructions with memory 736 or memory 760. Optionally, to reduce the load on the processor core, baseband signal processing circuit 7313 can also be provided to perform at least some baseband signal processing, including one or more of signal demodulation, modulation, encoding, or decoding.

[0182] In one example, the communication device provided in this application may be a terminal device 700, including a communication module comprising a processor system 730 and a radio frequency system 720, or a baseband processor 731.

[0183] The processor, processor system, application processor, baseband processor, processor circuit, or processor core mentioned above can be collectively referred to as a processor. The processor may include one or more of the following: central processing unit (CPU), digital signal processor (DSP), microprocessor unit (MPU), microcontroller unit (MCU), graphics processing unit (GPU), field programmable gate array (FPGA), artificial intelligence processor (AI processor), or neural processing unit (NPU).

[0184] The aforementioned memory may include one or more of the following storage media: random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), phase-change memory (PCM), resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), cache, register, read-only memory (ROM), flash memory, erasable programmable read-only memory (EPROM), hard disk, etc. In one example, computer program instructions for executing the above embodiments may be stored on non-volatile memory, such as at least a portion of the aforementioned memory 760 (e.g., one or more of ROM, flash memory, EPROM, or hard disk). When the terminal device is running, the corresponding computer program instructions may be partially or wholly loaded onto a memory with a faster transfer speed than the processor, such as at least a portion of the memory 736 and / or memory 7312 described above (e.g., one or more of RAM, SRAM, DRAM, PCM, RERAM, MRAM, FRAM, cache, or register), for the processor to execute in order to implement the steps in the above method embodiments.

[0185] In one example, the RF transceiver 722 and the RF front-end 721 can also be packaged in a single chip. In another example, the RF transceiver 722, the RF front-end 721, and the baseband processor 731 can also be packaged in a single chip.

[0186] This application provides a chip (or chip system) including a processor for implementing any of the above-described method embodiments.

[0187] This application provides a computer-readable storage medium storing a computer program or instructions that, when executed, implement any of the above-described method embodiments.

[0188] This application provides a computer program product, which includes a computer program or instructions that, when executed, implement any of the above-described method embodiments.

[0189] This application provides a communication system, including the terminal device and access network device in the above method embodiments.

[0190] The method steps in the embodiments of this application can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, compact disc read-only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Furthermore, the ASIC can reside in a first network element or a store-and-forward terrestrial function network element. Alternatively, the processor and storage medium can exist as discrete components in access network equipment or terminal equipment.

[0191] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. A computer program is a set of instructions that directs each step of an action of an electronic computer or other device with message processing capabilities. It is typically written in a programming language and runs on a target architecture. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed, in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be volatile or non-volatile, or it can include both types of storage media.

[0192] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0193] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0194] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

[0195] The terms "system" and "network" in this application embodiment are used interchangeably. "At least one" refers to one or more, and "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B, or C" includes A, B, C, AB, AC, BC, or ABC; "at least one of A, B, and C" can also be understood as including A, B, C, AB, AC, BC, or ABC. Furthermore, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in this application embodiment are used to distinguish multiple objects and are not used to limit the order, sequence, priority, or importance of multiple objects.

[0196] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, etc.) containing computer-usable program code.

[0197] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0198] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0199] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0200] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An access method, characterized in that, Applied to the terminal device side, the method includes: Send multiple Radio Resource Control Establishment Request messages, the Radio Resource Control Establishment Request messages being used for random access; Based on the first Radio Network Temporary Identifier (RNTI), blind detection of the Physical Downlink Control Channel (PDCCH) is performed. The PDCCH is used to schedule Radio Resource Control Establishment messages, and the PDCCH is scrambled by the first RNTI. Wherein, the first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages; or, the first RNTI is determined based on the starting time domain position of the random access resource group, wherein the plurality of resources carrying the plurality of radio resource control establishment request messages all belong to the random access resource group.

2. The method as described in claim 1, characterized in that, The starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message among the plurality of Radio Resource Control Establishment Request messages includes one or more of the following information: The starting radio frame number, starting radio subframe number, or starting timeslot number of the resource carrying the first radio resource control establishment request message.

3. The method as described in claim 1 or 2, characterized in that, Also includes: The terminal device receives a first radio resource control establishment message, which includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message. The plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

4. The method as described in claim 3, characterized in that, The receiving of the first radio resource control establishment message includes: Receive a first message, the first message including a first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of other terminal devices and / or the index of frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal devices.

5. The method according to any one of claims 1 to 4, characterized in that, The blind detection of PDCCH based on the first RNTI includes: Based on the first RNTI, blindly detect the PDCCH within the feedback time window corresponding to the Radio Resource Control Establishment Request message.

6. An access method, characterized in that, Applied to the access network device side, the method includes: Receive a first radio resource control establishment request message, the first radio resource control establishment request message is used for random access, and the first radio resource control establishment request message is one of a plurality of radio resource control establishment request messages sent by the terminal device. Transmit the Physical Downlink Control Channel (PDCCH), which is used to schedule the first Radio Resource Control Establishment Message, and the PDCCH is scrambled by the First Radio Network Temporary Identifier (RNTI). Wherein, the first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages; or, the first RNTI is determined based on the starting time domain position of the random access resource group, wherein the plurality of resources carrying the plurality of radio resource control establishment request messages all belong to the random access resource group.

7. The method as described in claim 6, characterized in that, The starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message among the plurality of Radio Resource Control Establishment Request messages includes one or more of the following information: The starting radio frame number, starting radio subframe number, or starting timeslot number of the resource carrying the first radio resource control establishment request message.

8. The method as described in claim 6 or 7, characterized in that, Also includes: Send the first radio resource control establishment message, which includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message.

9. The method as described in claim 8, characterized in that, The sending of the first radio resource control establishment message includes: Send a first message, the first message including a first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of other terminal devices and / or the index of frequency domain resources carrying the second radio resource control establishment request message sent by the other terminal devices.

10. The method according to any one of claims 6 to 9, characterized in that, The sending of the PDCCH includes: Send the PDCCH within the feedback time window corresponding to the first Radio Resource Control Establishment Request message.

11. A communication device, characterized in that, Includes a processing unit and a communication unit; The processing unit is configured to send multiple Radio Resource Control Establishment Request messages through the communication unit, wherein the Radio Resource Control Establishment Request messages are used for random access. The processing unit is further configured to perform blind detection of the Physical Downlink Control Channel (PDCCH) based on the first Radio Network Temporary Identifier (RNTI), wherein the PDCCH is used to schedule Radio Resource Control Establishment messages and the PDCCH is scrambled by the first RNTI; Wherein, the first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages; or, the first RNTI is determined based on the starting time domain position of the random access resource group, wherein the plurality of resources carrying the plurality of radio resource control establishment request messages all belong to the random access resource group.

12. The apparatus as claimed in claim 11, characterized in that, The starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message among the plurality of Radio Resource Control Establishment Request messages includes one or more of the following information: The starting radio frame number, starting radio subframe number, or starting timeslot number of the resource carrying the first radio resource control establishment request message.

13. The apparatus as claimed in claim 11 or 12, characterized in that, The processing unit is further configured to receive a first radio resource control establishment message through the communication unit. The first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message. The plurality of radio resource control establishment request messages include the first radio resource control establishment request message.

14. The apparatus as claimed in claim 13, characterized in that, The processing unit is configured to receive a first radio resource control establishment message through the communication unit, including: The communication unit is used to receive a first message, the first message including a first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resource carrying the second radio resource control establishment request message sent by the other terminal device.

15. The apparatus as claimed in any one of claims 11 to 14, characterized in that, The processing unit is used to blindly detect the PDCCH based on the first RNTI, including: Used to perform blind detection of PDCCH within the feedback time window corresponding to the Radio Resource Control Establishment Request message, based on the first RNTI.

16. A communication device, characterized in that, Includes a processing unit and a communication unit; The processing unit is configured to receive a first radio resource control establishment request message through the communication unit. The first radio resource control establishment request message is used for random access and is one of a plurality of radio resource control establishment request messages sent by the terminal device. The processing unit is further configured to send a Physical Downlink Control Channel (PDCCH) through the communication unit, wherein the PDCCH is used to schedule a first Radio Resource Control Establishment message, and the PDCCH is scrambled by a First Radio Network Temporary Identifier (RNTI). Wherein, the first RNTI is determined based on the starting time domain position of the resource carrying the first radio resource control establishment request message among the plurality of radio resource control establishment request messages; or, the first RNTI is determined based on the starting time domain position of the random access resource group, wherein the plurality of resources carrying the plurality of radio resource control establishment request messages all belong to the random access resource group.

17. The apparatus as claimed in claim 16, characterized in that, The starting time-domain location of the resource carrying the first Radio Resource Control Establishment Request message among the plurality of Radio Resource Control Establishment Request messages includes one or more of the following information: The starting radio frame number, starting radio subframe number, or starting timeslot number of the resource carrying the first radio resource control establishment request message.

18. The apparatus as claimed in claim 16 or 17, characterized in that, The processing unit is further configured to send the first radio resource control establishment message through the communication unit, wherein the first radio resource control establishment message includes the identifier of the terminal device and / or the index of the frequency domain resource carrying the first radio resource control establishment request message.

19. The apparatus as claimed in claim 18, characterized in that, The processing unit is configured to send a first radio resource control establishment message through the communication unit, including: The communication unit is used to send a first message, the first message including a first radio resource control establishment message and a second radio resource control establishment message, the second radio resource control establishment message including the identifier of another terminal device and / or the index of the frequency domain resource carrying the second radio resource control establishment request message sent by the other terminal device.

20. The apparatus as claimed in any one of claims 16 to 19, characterized in that, The processing unit is configured to send a PDCCH via the communication unit, including: Used to send PDCCH within the feedback time window corresponding to the first radio resource control establishment request message through the communication unit.

21. A communication device, characterized in that, It includes a processor and an interface circuit, the processor being configured to communicate with other devices via the interface circuit to implement the method of any one of claims 1 to 5, or to implement the method of any one of claims 6 to 10.

22. A computer program product, characterized in that, The computer program product includes a computer program or instructions that, when executed, implement the method of any one of claims 1 to 5, or the method of any one of claims 6 to 10.

23. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed, implement the method of any one of claims 1 to 5, or the method of any one of claims 6 to 10.

24. A chip, characterized in that, The chip includes a processor for implementing the method of any one of claims 1 to 5, or the method of any one of claims 6 to 10.

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