CN-122002608-A - Access method and communication device

Abstract

An access method and a communication device can be applied to the satellite communication field, such as NTN. In the method, the terminal equipment sends a plurality of radio resource control establishment request messages, the radio resource control establishment request messages correspond to the same RNTI (namely the first RNTI), and the terminal equipment blindly detects the PDCCH according to the first RNTI without blindly detecting the PDCCH according to the plurality of RNTI, so that blind detection complexity can be reduced, and power consumption of the terminal equipment can be reduced.

Inventors

• CHEN YING
• ZHANG JIAYIN
• WANG JUN

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (20)

1. 1. An access method, applied to a terminal device side, comprising: Transmitting a plurality of radio resource control establishment request messages, wherein the radio resource control establishment request messages are used for random access; According to a first radio network temporary identifier RNTI, blind-checking a physical downlink control channel PDCCH, wherein the PDCCH is used for scheduling a radio resource control building message, and the PDCCH is scrambled by the first RNTI; the first RNTI is determined according to a starting time domain position of a resource carrying a first radio resource control building request message in the plurality of radio resource control building request messages, or the first RNTI is determined according to a starting time domain position of a random access resource group, and a plurality of resources carrying the plurality of radio resource control building request messages all belong to the random access resource group.
2. 2. The method of claim 1, wherein the starting time domain location of the resource carrying a first one of the plurality of radio resource control setup request messages comprises one or more of the following information: A starting radio frame number, a starting radio subframe number, or a starting time slot number of a resource carrying the first radio resource control setup request message.
3. 3. The method of claim 1 or 2, further comprising: Receiving a first radio resource control establishing message, wherein the first radio resource control establishing message comprises an identifier of the terminal equipment and/or an index of frequency domain resources carrying a first radio resource control establishing request message, and the plurality of radio resource control establishing request messages comprise the first radio resource control establishing request message.
4. 4. The method of claim 3, wherein the receiving the first radio resource control setup message comprises: And receiving a first message, wherein the first message comprises the first radio resource control establishing message and a second radio resource control establishing message, and the second radio resource control establishing message comprises the identification of other terminal equipment and/or an index of frequency domain resources carrying a second radio resource control establishing request message sent by the other terminal equipment.
5. 5. The method according to any of claims 1 to 4, wherein the blind detection of PDCCH according to the first RNTI comprises: and blind detecting the PDCCH in a feedback time window corresponding to the radio resource control establishment request message according to the first RNTI.
6. 6. An access method, applied to an access network device side, comprising: receiving a first radio resource control establishment request message, wherein the first radio resource control establishment request message is used for random access, and the first radio resource control establishment request message is one radio resource control establishment request message in a plurality of radio resource control establishment request messages sent by terminal equipment; Transmitting a Physical Downlink Control Channel (PDCCH) used for scheduling a first radio resource control (RRU) establishment message, wherein the PDCCH is scrambled by a first Radio Network Temporary Identifier (RNTI); the first RNTI is determined according to a starting time domain position of a resource carrying a first radio resource control building request message in the plurality of radio resource control building request messages, or the first RNTI is determined according to a starting time domain position of a random access resource group, and a plurality of resources carrying the plurality of radio resource control building request messages all belong to the random access resource group.
7. 7. The method of claim 6, wherein the starting time domain location of the resource carrying the first one of the plurality of radio resource control setup request messages comprises one or more of the following information: A starting radio frame number, a starting radio subframe number, or a starting time slot number of a resource carrying the first radio resource control setup request message.
8. 8. The method of claim 6 or 7, further comprising: And sending the first radio resource control establishing message, wherein the first radio resource control establishing message comprises the identification of the terminal equipment and/or the index of the frequency domain resource carrying the first radio resource control establishing request message.
9. 9. The method of claim 8, wherein the sending the first radio resource control setup message comprises: And sending a first message, wherein the first message comprises the first radio resource control establishment message and a second radio resource control establishment message, and the second radio resource control establishment message comprises the identification of other terminal equipment and/or an index of frequency domain resources carrying a second radio resource control establishment request message sent by the other terminal equipment.
10. 10. The method of any of claims 6 to 9, wherein the transmitting the PDCCH comprises: And transmitting the PDCCH in a feedback time window corresponding to the first radio resource control establishment request message.
11. 11. A communication device, comprising a processing unit and a communication unit; The processing unit is configured to send a plurality of radio resource control establishment request messages through the communication unit, where the radio resource control establishment request messages are used for random access; The processing unit is further configured to blindly detect a physical downlink control channel PDCCH according to a first radio network temporary identifier RNTI, where the PDCCH is used to schedule a radio resource control setup message, and the PDCCH is scrambled by the first RNTI; the first RNTI is determined according to a starting time domain position of a resource carrying a first radio resource control building request message in the plurality of radio resource control building request messages, or the first RNTI is determined according to a starting time domain position of a random access resource group, and a plurality of resources carrying the plurality of radio resource control building request messages all belong to the random access resource group.
12. 12. The apparatus of claim 11, wherein the starting time domain location of the resource carrying a first one of the plurality of radio resource control setup request messages comprises one or more of the following information: A starting radio frame number, a starting radio subframe number, or a starting time slot number of a resource carrying the first radio resource control setup request message.
13. 13. The apparatus according to claim 11 or 12, wherein the processing unit is further configured to receive, by the communication unit, a first radio resource control setup message, the first radio resource control setup message comprising an identification of a terminal device and/or an index of frequency domain resources carrying a first radio resource control setup request message, the plurality of radio resource control setup request messages comprising the first radio resource control setup request message.
14. 14. The apparatus of claim 13, wherein the processing unit for receiving, by the communication unit, a first radio resource control setup message comprises: The communication unit is configured to receive a first message, where the first message includes the first radio resource control setup message and a second radio resource control setup message, and the second radio resource control setup message includes an identifier of another terminal device and/or an index of a frequency domain resource carrying a second radio resource control setup request message sent by the other terminal device.
15. 15. The apparatus of any of claims 11 to 14, wherein the processing unit to blindly test the PDCCH according to a first RNTI comprises: And the blind detection module is used for blind detection of the PDCCH in a feedback time window corresponding to the radio resource control establishment request message according to the first RNTI.
16. 16. A communication device, comprising a processing unit and a communication unit; The processing unit is configured to receive, by using the communication unit, a first radio resource control establishment request message, where the first radio resource control establishment request message is used for random access, and the first radio resource control establishment request message is one radio resource control establishment request message from multiple 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, where the PDCCH is used to schedule a first radio resource control setup message, and the PDCCH is scrambled by a first radio network temporary identifier RNTI; the first RNTI is determined according to a starting time domain position of a resource carrying a first radio resource control building request message in the plurality of radio resource control building request messages, or the first RNTI is determined according to a starting time domain position of a random access resource group, and a plurality of resources carrying the plurality of radio resource control building request messages all belong to the random access resource group.
17. 17. The apparatus of claim 16, wherein the starting time domain location of the resource carrying a first one of the plurality of radio resource control setup request messages comprises one or more of: A starting radio frame number, a starting radio subframe number, or a starting time slot number of a resource carrying the first radio resource control setup request message.
18. 18. The apparatus according to claim 16 or 17, wherein the processing unit is further configured to send the first radio resource control setup message via the communication unit, the first radio resource control setup message comprising an identification of the terminal device and/or an index of frequency domain resources carrying the first radio resource control setup request message.
19. 19. The apparatus of claim 18, wherein the processing unit for sending, by the communication unit, a first radio resource control setup message comprises: The method comprises the steps of sending a first message through the communication unit, wherein the first message comprises the first radio resource control establishment message and a second radio resource control establishment message, and the second radio resource control establishment message comprises the identification of other terminal equipment and/or an index of frequency domain resources carrying a second radio resource control establishment request message sent by the other terminal equipment.
20. 20. The apparatus according to any one of claims 16 to 19, wherein the processing unit configured to transmit, by the communication unit, a PDCCH comprises: and the communication unit is used for sending the PDCCH in a feedback time window corresponding to the first radio resource control establishment request message.

Description

Access method and communication device Technical Field The present application relates to the field of communications technologies, and in particular, to an access method and a communications device. Background In order to increase the speed at which terminal devices access the network and thereby increase the number of terminal devices accessed in the network, it is currently considered in the third generation partnership project (3rd generation partnership project,3GPP) standard discussion to omit msg1 and msg2 in the random access procedure, i.e. the terminal devices do not transmit msg1 nor receive msg2, but instead transmit msg3 and receive msg4 directly. Since msg1 is not transmitted, contention collision cannot be reduced through a preamble (preamble) carried in msg1, so that collision probability of msg3 transmitted by different terminal devices is increased, and success rate of accessing the network by the terminal devices is reduced. In order to improve the success rate of the terminal equipment accessing the network, the terminal equipment can be allowed to send a plurality of msg3 at one time, and corresponding msg4 can be sent to the terminal equipment as long as the network side correctly analyzes one of the msg 3. After the terminal device sends msg3, blind-checking a physical downlink control channel (physical downlink control channel, PDCCH) sent by the access network device according to a radio network temporary identifier (radio network temporary identifier, RNTI), wherein the PDCCH is used for scheduling msg4, namely, indicating resources carrying the msg4. After blind detection of the PDCCH, the terminal equipment receives msg4 according to the resource position scheduled by the PDCCH. The PDCCH is scrambled by the RNTI, which relates to the time domain position of the resource carrying msg 3. In the scenario that the terminal device sends a plurality of msg3, how to design the scrambling mode of the PDCCH so as to reduce the power consumption of the power consumption device needs to be solved. Disclosure of Invention The embodiment of the application provides an access method and a communication device, which can reduce the power consumption of terminal equipment. In a first aspect, an embodiment of the present application provides an access method, where the method may be applied to a terminal device side, for example, an execution body may be a terminal device or a component in the terminal device, for example, a communication module in the terminal device, or a circuit or a chip (such as a modem (modem) chip, also called a baseband (baseband) chip, or a system-on-a-chip (systemonchip, soC) chip or a system-in-package (SYSTEMINPACKAGE, SIP) chip) that is responsible for a communication function in the terminal device, and may also be a logic module or software that can implement all or part of the functions of the terminal device. The method comprises the steps of sending a plurality of radio resource control building request messages, wherein the radio resource control building request messages are used for random access, blindly detecting PDCCH (physical downlink control channel), the PDCCH is used for scheduling the radio resource control building messages according to a first RNTI, the PDCCH is scrambled by the first RNTI, the first RNTI is determined according to the initial time domain position of resources carrying the first radio resource control building request message in the plurality of radio resource control building request messages, or the first RNTI is determined according to the initial time domain position of a random access resource group, and a plurality of resources carrying the plurality of radio resource control building request messages belong to the random access resource group. Based on the above scheme, the terminal device sends a plurality of radio resource control establishment request messages, the radio resource control establishment request messages correspond to the same RNTI (i.e., a first RNTI), the access network device uses the first RNTI to scramble the PDCCH no matter which radio resource control establishment request message of the plurality of radio resource control establishment request messages sent by the terminal device is received, the PDCCH is used for scheduling the radio resource control establishment message corresponding to the radio resource control establishment request message, the terminal device blindly detects the PDCCH according to the first RNTI, and the blind detection complexity can be reduced without blindly detecting the PDCCH according to the plurality of RNTIs, thereby the power consumption of the terminal device can be reduced. In one possible implementation, the starting time domain position of the resource carrying the first radio resource control setup request message in the plurality of radio resource control setup request messages includes one or more of a starting radio frame number, a starting radio subframe num