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CN-122003947-A - Terminal and communication method

CN122003947ACN 122003947 ACN122003947 ACN 122003947ACN-122003947-A

Abstract

The terminal has a receiving unit that receives setting information for setting a random access channel opportunity to be used for random access channel transmission from a base station, and a control unit that sets the random access channel opportunity based on the setting information. The setting information includes a plurality of random access channel opportunity modes. The plurality of random access channel opportunity patterns respectively include an identifier identifying the random access channel opportunity, and at least one of information indicating the number of synchronization signal blocks associated with the random access channel opportunity and information indicating the number of the random access channel opportunities allocated in a frequency domain.

Inventors

  • SHICHIJO TAICHI
  • HARADA HIROYASU

Assignees

  • 株式会社NTT都科摩

Dates

Publication Date
20260508
Application Date
20240116

Claims (6)

  1. 1. A terminal, having: a receiving unit for receiving setting information for setting a random access channel opportunity used for random access channel transmission from a base station, and A control unit for setting a random access channel opportunity based on the setting information, The setting information includes a plurality of random access channel opportunity modes, The plurality of random access channel opportunity patterns respectively include an identifier identifying the random access channel opportunity, and at least one of information indicating the number of synchronization signal blocks associated with the random access channel opportunity and information indicating the number of the random access channel opportunities allocated in a frequency domain.
  2. 2. The terminal of claim 1, wherein, The setting information comprises a plurality of random access channel opportunity sets, The plurality of random access channel opportunity sets respectively include the plurality of random access channel opportunity patterns.
  3. 3. The terminal of claim 1, wherein, The plurality of random access channel opportunity patterns each further includes a setting of a time direction of the random access channel opportunity, The setting of the time direction includes setting at least any one of a period, an offset, and a period of the random access channel opportunity.
  4. 4. The terminal of claim 3, wherein, The receiving unit receives information indicating whether or not to apply the setting of the time direction from the base station.
  5. 5. The terminal of claim 1, wherein, Any one of scaling of different periods and shifting of different time directions is applied to the plurality of random access channel opportunity patterns, respectively.
  6. 6. A communication method, which is a communication method performed by a terminal, having the steps of: Receiving setting information for setting a random access channel opportunity used in random access channel transmission from a base station, and Setting a random access channel opportunity based on the setting information, The setting information includes a plurality of random access channel opportunity modes, The plurality of random access channel opportunity patterns respectively include an identifier identifying the random access channel opportunity, and at least one of information indicating the number of synchronization signal blocks associated with the random access channel opportunity and information indicating the number of the random access channel opportunities allocated in a frequency domain.

Description

Terminal and communication method Technical Field The present invention relates to a terminal and a communication method in a wireless communication system. Background In NR (New Radio: new air interface) which is a subsequent system of LTE (Long Term Evolution: long term evolution) (also referred to as "5G"), a technology of satisfying a high capacity system, a high data transmission rate, a low delay, simultaneous connection of a plurality of terminals, a low cost, power saving, and the like which are requirements is being studied (for example, non-patent document 1). In release 18 of 3GPP (registered trademark), in order to achieve environmental sustainability, carbon neutralization, SDGs (Sustainable Development Goals: sustainable development goal), reduction in operation cost, and the like, a method of increasing importance of saving power in a Network (Network ENERGY SAVINGS: network energy saving) and performing power saving has been studied (for example, non-patent document 2). In order to reduce Network power consumption, it is studied to dynamically set RACH (Random ACCESS CHANNEL: random access channel) opportunities in a NES (Network ENERGY SAVINGS: network power saving) mode to enable a Network reception module (e.g., user equipment UE) to sleep finely and flexibly. Prior art literature Non-patent literature Non-patent document 1:3GPP TS 38.300 V18.0.0 (2023-12) Non-patent document 2, "New WID: network ENERGY SAVINGS for NR", RP-223540, 3GPP TSG RAN Meeting #98-e, month 12 of 2022 Non-patent document 3:3GPP TR 38.822 V17.1.0 (2023-06) Non-patent document 4:3GPP TS 38.331 V17.6.0 (2023-09) Disclosure of Invention Problems to be solved by the invention However, the conventional RACH opportunity setting is limited to one type, and cannot be set for a period of a predetermined period or more. In order to realize dynamic adaptation of RACH occasions, it is not clear how RACH occasions are set. Means for solving the problems The terminal in this embodiment includes a receiving unit that receives setting information for setting a random access channel opportunity to be used for random access channel transmission from a base station, and a control unit that sets a random access channel opportunity based on the setting information, wherein the setting information includes a plurality of random access channel opportunity patterns each including an identifier that identifies the random access channel opportunity, and at least one of information indicating the number of synchronization signal blocks associated with the random access channel opportunity and information indicating the number of random access channel opportunities allocated in a frequency domain. ADVANTAGEOUS EFFECTS OF INVENTION According to the present embodiment, in the radio communication system, RACH opportunity setting can be flexibly performed. Drawings Fig. 1 is a diagram for explaining a wireless communication system according to the present embodiment. Fig. 2 is a diagram illustrating an example of an initial access procedure between a UE and a gNB. Fig. 3 is a diagram showing an example of the structure of SSB in NR. Fig. 4A is a diagram for explaining RACH occalasion (RO: random access channel opportunity) setting. Fig. 4B is a diagram for explaining RO setting. Fig. 5A is a diagram showing an example of an information element of RACH-ConfigCommon included in SIB 1. Fig. 5B is a diagram showing an example of an information element of RACH-ConfigGeneric included in SIB 1. Fig. 5C is a diagram showing an example of setting a conventional RO. Fig. 5D is a diagram showing an example of setting a conventional RO. Fig. 6 is a timing chart showing an example of a procedure between a terminal and a base station in embodiment 1. Fig. 7 is a diagram showing an example of parameters included in SIB1 of embodiment 1. Fig. 8 is a timing chart showing an example of a procedure between a terminal and a base station in embodiment 2. Fig. 9 is a diagram showing an example of information included in the RO mode of embodiment 3. Fig. 10 is a timing chart showing an example of a procedure between a terminal and a base station in embodiment 5. Fig. 11 is a diagram showing an example of the functional configuration of the base station according to the present embodiment. Fig. 12 is a diagram showing an example of the functional configuration of the terminal according to the present embodiment. Fig. 13 is a diagram showing an example of a hardware configuration of a base station or a terminal according to the present embodiment. Fig. 14 is a diagram showing an example of the structure of the vehicle according to the present embodiment. Detailed Description The present embodiment will be described below with reference to the drawings. The embodiment or embodiments described below are merely examples, and the embodiment to which the present invention is applied is not limited to the following embodiments. In the operation of the wireless communication sys