CN-122002607-A - Random access method and related device

Abstract

The application provides a random access method and a related device, wherein the method comprises the following steps: the terminal device receives first indication information from the network device. The first indication information is used for indicating a random access resource type adopted by the terminal equipment, and the random access resource type is a first type or a second type. The terminal equipment determines a first random access resource according to the type of the random access resource adopted by the terminal equipment, and initiates random access to the network equipment through the first random access resource. Thereby realizing that the terminal equipment initiates random access through one type of random access.

Inventors

• LIU KAIHAO
• Louis Madier
• LIU HENG
• HAN FENG
• LI JUN
• YOU CHUNHUA

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241107

Claims (20)

1. 1. A random access method, the method comprising: Receiving first indication information from network equipment, wherein the first indication information is used for indicating a random access resource type adopted by terminal equipment, and the random access resource type is a first type or a second type; determining a first random access resource according to the type of the random access resource adopted by the terminal equipment; And initiating random access to the network equipment through the first random access resource.
2. 2. A random access method, the method comprising: the method comprises the steps of sending first indication information to terminal equipment, wherein the first indication information is used for indicating a random access resource type adopted by the terminal equipment, and the random access resource type is a first type or a second type; And receiving the random access initiated by the terminal equipment through a first random access resource, wherein the first random access resource is determined according to the type of the random access resource adopted by the terminal equipment.
3. 3. The method according to claim 1 or 2, characterized in that the random access resources of the first type are legacy random access resources and the random access resources of the second type are energy saving random access resources.
4. 4. A method according to claim 1 or 3, wherein said determining a first random access resource based on a random access resource type employed by said terminal device comprises: determining a first physical radio access channel PRACH configuration index, a first PRACH mask index and first frequency domain position information corresponding to a random access resource type adopted by the terminal equipment; and determining the first random access resource according to the first PRACH configuration index, the first PRACH mask index and the first frequency domain position information.
5. 5. The method of claim 4, wherein the determining the first random access resource from the first PRACH configuration index, the first PRACH mask index, and the first frequency domain location information comprises: Determining candidate sending occasions corresponding to the first PRACH configuration indexes according to a first mapping relation, wherein the first mapping relation is used for indicating the mapping relation between one or more PRACH configuration indexes and the candidate sending occasions; Determining a sending time index corresponding to the first PRACH mask index according to a second mapping relation, wherein the second mapping relation is used for indicating the mapping relation between one or more PRACH mask indexes and the sending time index; And taking the transmission opportunity with the corresponding transmission opportunity index as the transmission opportunity index corresponding to the first PRACH mask index in the candidate transmission opportunities as a time domain resource occupied by the first random access resource.
6. 6. A method according to claim 2 or 3, characterized in that the method further comprises: and determining the type of the random access resource adopted by the terminal equipment according to the occupation condition of the random access resource of the first type and the occupation condition of the random access resource of the second type.
7. 7. The method according to any of claims 1 to 6, wherein the first indication information is carried in a medium access control element, MAC CE, radio resource control, RRC, signaling, or downlink control information, DCI.
8. 8. The method according to claim 7, wherein the first indication information is one or more reserved bits in the MAC CE or the DCI, and the value of the one or more reserved bits is used to indicate a random access resource type employed by the terminal device; Or alternatively The first indication information is a field in the RRC signaling, and a value of the field is used to indicate a random access resource type adopted by the terminal device.
9. 9. A random access method, the method comprising: selecting a first type of random access resource or a second type of random access resource according to a first rule; And initiating random access to the network equipment according to the random access resource of the first type or the random access resource of the second type.
10. 10. The method of claim 9, wherein the selecting the first type of random access resource or the second type of random access resource according to the first rule comprises: And selecting a random access resource with a front or rear occupied time domain position from the random access resource of the first type and the random access resource of the second type as the random access resource adopted by the terminal equipment for initiating random access.
11. 11. The method according to claim 9 or 10, wherein the first rule is preconfigured or predefined, or the method further comprises: First configuration information is received from the network device, the first configuration information being used to configure the first rule.
12. 12. The method according to any of claims 9 to 11, wherein the first type of random access resource is a legacy random access resource and the second type of random access resource is an energy efficient random access resource.
13. 13. The method according to any one of claims 9 to 12, further comprising: Determining the random access resource of the first type according to a second PRACH configuration index, a second PRACH mask index and second frequency domain position information corresponding to the random access resource of the first type; and determining the random access resource of the second type according to a third PRACH configuration index, a third PRACH mask index and third frequency domain position information corresponding to the random access resource of the second type.
14. 14. The method of claim 13, wherein the determining the first type of random access resource according to the second PRACH configuration index, the second PRACH mask index, and the second frequency domain location information corresponding to the first type of random access resource comprises: determining candidate sending occasions corresponding to the second PRACH configuration indexes according to a third mapping relation, wherein the third mapping relation is used for indicating the mapping relation between one or more PRACH configuration indexes and the candidate sending occasions; Determining a sending time index corresponding to the second PRACH mask index according to a fourth mapping relation, wherein the fourth mapping relation is used for indicating the mapping relation between one or more PRACH mask indexes and the sending time index; and taking the transmission opportunity corresponding to the transmission opportunity index corresponding to the second PRACH mask index as the random access resource of the first type in the candidate transmission opportunities.
15. 15. The method of claim 13, wherein the determining the second type of random access resource according to a third PRACH configuration index, a third PRACH mask index, and third frequency domain location information corresponding to the second type of random access resource comprises: Determining candidate sending occasions corresponding to the third PRACH configuration indexes according to a fifth mapping relation, wherein the fifth mapping relation is used for indicating the mapping relation between one or more PRACH configuration indexes and the candidate sending occasions; determining a sending time index corresponding to the third PRACH mask index according to a sixth mapping relation, wherein the sixth mapping relation is used for indicating the mapping relation between one or more PRACH mask indexes and the sending time index; and taking the transmission opportunity corresponding to the transmission opportunity index corresponding to the third PRACH mask index as the time domain resource occupied by the second type of random access resource in the candidate transmission opportunity.
16. 16. A method of communication, the method comprising: receiving random access initiated by the terminal equipment through the random access resource of the first type or the random access resource of the second type; And releasing the second type of random access resources allocated to the terminal equipment by the network equipment if the terminal equipment initiates random access through the first type of random access resources, or releasing the first type of random access resources allocated to the terminal equipment by the network equipment if the terminal equipment initiates random access through the second type of random access resources.
17. 17. The method according to claim 16, characterized in that before the random access initiated by the receiving terminal device over the random access resource of the first type or the random access resource of the second type, the method further comprises: Reserving the first type of random access resources and the second type of random access resources for the terminal device.
18. 18. A method of communication, the method comprising: Receiving second configuration information from the network device, wherein the second configuration information is used for configuring random access resources with at least one characteristic, and the random access resources belong to a second type of random access resources; Determining a second random access resource from the random access resource of the at least one characteristic and the random access resource of the first type according to the characteristic required by the terminal equipment, the random access resource of the at least one characteristic and the random access resource of the first type, wherein the second random access resource supports the characteristic required by the terminal equipment; and initiating random access to the network equipment through the second random access resource.
19. 19. A method of communication, the method comprising: Transmitting second configuration information to the terminal equipment, wherein the second configuration information is used for configuring random access resources with at least one characteristic, and the random access resources with the at least one characteristic belong to a second type of random access resources; And receiving the random access initiated by the terminal equipment through a second random access resource, wherein the second random access resource is determined from the random access resource with at least one characteristic and the random access resource with the first type according to the characteristic required by the terminal equipment, the random access resource with at least one characteristic and the random access resource with the first type.
20. 20. The method of claim 18 or 19, wherein the at least one characteristic is an energy saving characteristic, or The at least one characteristic of random access resource support is different from the first type of random access resource support, or And in the random access resources with at least one characteristic and the random access resources with the first type, partial random access resources support the same characteristic.

Description

Random access method and related device Technical Field The present application relates to the field of communications technologies, and in particular, to a random access method and a related device. Background Random access is a key link of accessing a User Equipment (UE) to a core network, and is widely applied to various communication scenarios. Such as initial network access, network handover, resynchronization in the out-of-sync state of the uplink, etc. However, the conventional random access mechanism has some problems, especially in case that the random access channel is too densely timed, resulting in significant increase of power consumption. In order to optimize the utilization of random access resources, a new random access resource allocation strategy is introduced, and differentiated random access resource allocation is used according to different types of terminal equipment. Specifically, the legacy UE initiates random access using a set of random access resources that are sparsely distributed. And the energy-saving UE can initiate random access by adopting a group of more densely distributed random access resources. When the network needs to further improve the energy efficiency, the network operator can only adjust the random access resource used by the energy-saving UE, so that the reliability and the flexibility of network access can be ensured while the energy consumption is reduced. However, for a power saving UE, in case there are multiple sets of random access resources, it is a considerable problem which set of random access resources should be used by the power saving UE to initiate random access. Disclosure of Invention The application provides a random access method and a related device, which are used for terminal equipment to receive first indication information from network equipment. The first indication information is used for indicating the type of the random access resource adopted by the terminal equipment. Thereby indicating the type of random access resource employed by the terminal device. In this way, the terminal device can select the corresponding random access resource and initiate random access in combination with the first indication information. In other words, the terminal device may determine what type of random access resources the network device configures for and determine the corresponding random access resources to initiate random access. The first aspect of the present application provides a random access method, which may be performed by a terminal device or by an apparatus (e.g. a processor, a chip, a system-on-chip, a chip module, a control unit, a processing unit or an integrated circuit, etc.) in a terminal device. The first aspect will be described below taking the application of the method to a terminal device as an example. The method includes that the terminal equipment receives first indication information from the network equipment. The first indication information is used for indicating a random access resource type adopted by the terminal equipment, and the random access resource type is a first type or a second type. The terminal equipment determines a first random access resource according to the type of the random access resource adopted by the terminal equipment, and initiates random access to the network equipment through the first random access resource. In the above technical solution, the terminal device receives the first indication information from the network device. The first indication information is used for indicating the type of the random access resource adopted by the terminal equipment. Thereby indicating the type of random access resource employed by the terminal device. In this way, the terminal device can select the corresponding random access resource and initiate random access in combination with the first indication information. In other words, the terminal device may determine what type of random access resources the network device configures for and determine the corresponding random access resources to initiate random access. A second aspect of the application provides a random access method, which may be performed by a network device or by an apparatus (e.g. a processor, a chip, a system-on-chip, a chip module, a control unit, a processing unit or an integrated circuit, etc.) in a network device. The second aspect is described below taking the application of the method to a network backup as an example. The method comprises the step that the network equipment sends first indication information to the terminal equipment. The first indication information is used for indicating a random access resource type adopted by the terminal equipment, and the random access resource type is a first type or a second type. Then, the network device receives the random access initiated by the terminal device through the first random access resource, and the first random access resource is determined according to the type of the ran