EP-4738753-A2 - METHOD AND APPARATUS FOR DETERMINING INITIAL BANDWIDTH PART BWP, AND STORAGE MEDIUM

EP4738753A2EP 4738753 A2EP4738753 A2EP 4738753A2EP-4738753-A2

Abstract

A method and an apparatus for determining an initial bandwidth part BWP are provided. The method includes: determining a frequency resource of a first initial BWP, where the frequency resource of the first initial BWP is included in a frequency resource of a second initial BWP, the frequency resource of the first initial BWP corresponds to a first-type terminal device, the frequency resource of the second initial BWP corresponds to a second-type terminal device, and the terminal devices of two types have different capabilities. The solutions provided in embodiments of this application provide a new method for determining a BWP, so that a system supports terminal devices of different types and required system bandwidth is reduced.

Inventors

ZHENG, JUAN
LI, CHAOJUN
HOU, Hailong
JIN, ZHE

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20200122

Claims (15)

A communication method, wherein the method is performed by a first-type terminal device or a chip of the first-type terminal device, and the first-type terminal device is a new radio, NR, reduced capability terminal device, and comprises: receiving a synchronization signal block, SSB, from a network device; receiving a system information block 1, SIB 1, from the network device, wherein the SIB 1 configures frequency resource of a first initial bandwidth part, BWP; determining a frequency resource of the first initial BWP corresponding to the first-type terminal device, wherein the frequency resource of the first initial BWP does not overlap a frequency resource of the SSB; and receiving signaling and/or data from the network device based on the frequency resource of the first initial BWP.
The method according to claim 1, the frequency resource of the SSB overlap a second initial BWP, the second initial BWP corresponding to a second-type terminal device, and the first-type terminal device and a second-type terminal device have different capabilities, wherein the second-type terminal device is a non-NR reduced capability terminal device.
The method according to claim 1 or 2, wherein that the first-type terminal device and the second-type terminal device have different capabilities comprises at least one of the following: the first-type terminal device and the second-type terminal device have different bandwidth capabilities; the first-type terminal device and the second-type terminal device have different quantities of receive antennas; or the first-type terminal device and the second-type terminal device have different maximum uplink transmit powers.
The method according to any one of claims 1 to 3, wherein the first initial BWP comprises at least one of: system information and/or control information for scheduling transmission of the system information; paging information and/or control information for scheduling transmission of the paging information; and random access response information.
The method according to any one of claims 2 to 4, wherein the first initial BWP is an initial BWP of the first-type terminal device in radio resource control, RRC, idle state or RRC inactive state.
A communication method, wherein the method is performed by a network device or a chip of the network device, and comprises: transmitting a synchronization signal block, SSB; transmitting a system information block 1, SIB 1, wherein the SIB 1 configures frequency resource of a first initial bandwidth part BWP and the first initial BWP corresponding to a first-type terminal device, wherein the frequency resource of the first initial, BWP, does not overlap a frequency resource of the SSB; and transmitting signaling and/or data to the first-type terminal device based on the frequency resource of the first initial BWP, wherein the first-type terminal device is a new radio, NR, reduced capability terminal device.
The method according to claim 6, the frequency resource of the SSB overlap a second initial BWP, the second initial BWP corresponding to a second-type terminal device, and the first-type terminal device and a second-type terminal device have different capabilities, wherein the second-type terminal device is a non-NR reduced capability terminal device.
The method according to claim 6 or 7, wherein that the first-type terminal device and the second-type terminal device have different capabilities comprises at least one of the following: the first-type terminal device and the second-type terminal device have different bandwidth capabilities; the first-type terminal device and the second-type terminal device have different quantities of receive antennas; or the first-type terminal device and the second-type terminal device have different maximum uplink transmit powers.
The method according to any one of claims 6 to 8, wherein the first initial BWP comprises at least one of: system information and/or control information for scheduling transmission of the system information; paging information and/or control information for scheduling transmission of the paging information; and random access response information.
The method according to any one of claims 7 to 9, wherein the first initial BWP is an initial BWP of the first-type terminal device in radio resource control, RRC, idle state or RRC inactive state.
A communication apparatus, wherein the apparatus is a first-type terminal device or a chip of the first-type terminal device, comprising: means for performing the method according to any one of claims 1 to 5.
A communication apparatus, wherein the apparatus is a network device or a chip of the network device, comprising: means for performing the method according to any one of claims 6 to 10.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program; and when the computer program is run on a computer of a first-type terminal device, the computer is enabled to perform the method according to any one of claims 1 to 5.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program; and when the computer program is run on a computer of a network device, the computer is enabled to perform the method according to any one of claims 6 to 10.
A communications system, comprising a communication apparatus performing the method according to any one of claims 1 to 5 and a communication apparatus performing the method according to any one of claims 6 to 10.

Description

TECHNICAL FIELD This application relates to the communication field, and in particular, to a method and an apparatus for determining an initial bandwidth part BWP and a storage medium. BACKGROUND A new radio (new radio, NR) system is a fifth generation (fifth generation, 5G) mobile communication technology standard based on a new orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) air interface design, and is also a very important basis of a next-generation cellular mobile technology. There are quite diversified services in the NR system, and the services may include an enhanced mobile broadband (enhanced mobile broadband, eMBB) service, an ultra-reliable low-latency communication (ultra-reliable low-latency communication, URLLC) service, and a massive machine-type communications (massive machine-type communications, mMTC) service. Diversified services in the NR system require that the NR system be designed to meet access requirements of terminal devices with different bandwidth capabilities. For example, a terminal device that transmits the eMBB service and a terminal device that transmits the URLLC service may access the NR system by determining broadband information of the NR system. In contrast, in consideration of design costs, low power consumption, and the like, some terminal devices that transmit the mMTC service are usually not designed with very large operating bandwidth for data transmission, and consequently usually perform access only by using narrow bandwidth. Bandwidth in the NR system is wide, and is at least 100 MHz. Due to different bandwidth capabilities of terminal devices, maximum bandwidth supported by the terminal devices is different. Some terminal devices may support only 80 MHz, 40 MHz, 20 MHz, or even narrower bandwidth. Therefore, usually, in NR, a concept of initial downlink bandwidth part (bandwidth part, BWP) is introduced to adapt to a requirement of a terminal device for maximum bandwidth. SUMMARY This application provides a method and an apparatus for determining an initial downlink bandwidth part BWP and a storage medium, and provides a new initial BWP design solution, so that initial bandwidth parts of terminal devices of different types can be configured differently, thereby improving initial access performance of the terminal devices of different types. A first aspect of this application provides a method for determining an initial bandwidth part BWP. The method may be used in a wireless communication system, including a 4.5G or 5G wireless communication system, an NR-based further evolved system, and a future wireless communication system. The method may include: determining a frequency resource of a first initial BWP corresponding to a first-type terminal device, where the frequency resource of the first initial BWP may be included in a frequency resource of a second initial BWP corresponding to a second-type terminal device, and the first-type terminal device and the second-type terminal device have different capabilities; and transmitting signaling and/or data to a network device based on the frequency resource of the first initial BWP. This application relates to terminal devices of two types. The terminal device may also be referred to as a terminal, user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), or the like. The terminal device in embodiments of this application may be a mobile phone (mobile phone), a tablet computer (Pad), or a computer that has a wireless transceiver function, or may be a wireless terminal used in scenarios such as virtual reality (virtual reality, VR), augmented reality (augmented reality, AR), industrial control (industrial control), self driving (self driving), telemedicine (telemedicine), a smart grid (smart grid), transportation safety (transportation safety), a smart city (smart city), and a smart home (smart home). In this application, the foregoing terminal device and a chip that can be used in the foregoing terminal device are collectively referred to as a terminal device. It should be understood that a specific technology used by and a specific device form of the terminal device are not limited in embodiments of this application. It can be learned from the first aspect that the first aspect provides a new method for determining an initial bandwidth part BWP. The method has a simple design, has an original design intention of an existing second initial BWP, and reduces standard design complexity. Optionally, with reference to the first aspect, in a first possible implementation, that the first-type terminal device and the second-type terminal device have different capabilities may include at least one of the following: the first-type terminal device and the second-type terminal device have different bandwidth capabilities; the first-type terminal device and the second-type terminal device have different quantities of transmit