CN-116171562-B - Method and apparatus for Doppler precompensation

CN116171562BCN 116171562 BCN116171562 BCN 116171562BCN-116171562-B

Abstract

Each of the plurality of doppler precompensation modes is used to perform doppler precompensation on the synchronization signal to generate a plurality of sets of doppler precompensated synchronization signals transmitted using one or more beams. In connection with initial access of a User Equipment (UE), idle UE cell reselection, connected UE data channel reception or UE handover, a signal indicating the doppler precompensation mode used is sent in one of a System Information Block (SIB) or a Radio Resource Control (RRC) reconfiguration message. The signal indicates a Doppler pre-compensation mode of the transmitting cell and a Doppler pre-compensation mode of one or more neighboring cells. The synchronization signal includes a Synchronization Signal Block (SSB) including a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). In connection with timing synchronization detection, frequency Offset (FO) estimation, or Reference Signal Received Power (RSRP) measurement, the received doppler precompensated synchronization signals are combined in the time domain.

Inventors

S.TIAN
Ye Qiaoyang
Quan Zhenghu
ZHAO JUNYING

Assignees

三星电子株式会社

Dates

Publication Date: 20260508
Application Date: 20210315
Priority Date: 20201218

Claims (13)

1. A user equipment, UE, comprising: Transceiver, and A processor coupled to the transceiver and configured to: receiving a plurality of sets of doppler precompensated synchronization signals from a base station, the plurality of sets of doppler precompensated synchronization signals corresponding to each of the doppler precompensated patterns applied to the sets of synchronization signals; Identify a frequency difference between two or more consecutive synchronization signals among a plurality of sets of the received doppler pre-compensated synchronization signals, Applying a phase rotation to at least one of the two or more consecutive synchronization signals based on a frequency difference between the two or more consecutive synchronization signals to compensate for the frequency difference, and In combination with one of timing synchronization detection, frequency Offset (FO) estimation, or Reference Signal Received Power (RSRP) measurement, two or more consecutive synchronization signals of phase rotation are combined in the time domain.
2. The UE of claim 1, wherein the indication of the doppler precompensation mode received from the base station is received based on a System Information Block (SIB) or a Radio Resource Control (RRC) reconfiguration message.
3. The UE of claim 1, wherein the indication of the doppler precompensation mode received from the base station indicates a doppler precompensation mode of a transmitting cell and a doppler precompensation mode of one or more neighboring cells.
4. The UE of claim 1, wherein the processor is configured to combine the two or more consecutive synchronization signals among the plurality of sets of received doppler pre-compensated synchronization signals in the time domain during data channel reception or handover.
5. The UE of claim 1, wherein the indication of the doppler precompensation mode received from the base station indicates whether the same doppler precompensation mode was applied before and after handover.
6. A method performed by a user equipment, UE, includes receiving a plurality of sets of doppler precompensated synchronization signals from a base station, the plurality of sets of doppler precompensated synchronization signals corresponding to each of a doppler precompensated pattern applied to the sets of synchronization signals; Identify a frequency difference between two or more consecutive synchronization signals among a plurality of sets of the received doppler pre-compensated synchronization signals, Applying a phase rotation to at least one of the two or more consecutive synchronization signals based on a frequency difference between the two or more consecutive synchronization signals to compensate for the frequency difference, and In combination with one of timing synchronization detection, frequency Offset (FO) estimation, or Reference Signal Received Power (RSRP) measurement, two or more consecutive synchronization signals of phase rotation are combined in the time domain.
7. The method of claim 6, the method further comprising: During data channel reception or handoff, combining the two or more consecutive synchronization signals among the plurality of sets of received Doppler pre-compensated synchronization signals in the time domain, Wherein the indication of the doppler precompensation mode received from the base station is received based on a System Information Block (SIB) or a Radio Resource Control (RRC) reconfiguration message.
8. The method of claim 6, wherein the indication of the doppler precompensation mode received from the base station indicates a doppler precompensation mode of a transmitting cell and a doppler precompensation mode of one or more neighboring cells.
9. A base station BS, comprising: The radio frequency (rf) signal of the transceiver, A processor coupled to the transceiver and configured to: Performing doppler precompensation on the set of synchronization signals using each of the doppler precompensation modes to generate a plurality of sets of doppler precompensated synchronization signals; An indication of the doppler precompensation mode is sent to the user equipment UE, A plurality of sets of doppler pre-compensated synchronization signals are transmitted to the UE, wherein the indication of the doppler pre-compensation mode is for combining two or more consecutive synchronization signals among the plurality of sets of doppler pre-compensated synchronization signals in the time domain.
10. The BS of claim 9, wherein the processor is configured to send an indication of the doppler precompensation mode to the UE based on a System Information Block (SIB) or a Radio Resource Control (RRC) reconfiguration message.
11. The BS of claim 9, wherein the indication of doppler precompensation mode is transmitted in connection with one of initial access by a UE, idle UE cell reselection, connected UE data channel reception, or UE handover.
12. The BS of claim 9, wherein the indication of the doppler precompensation mode indicates a doppler precompensation mode of a transmitting cell and a doppler precompensation mode of one or more neighboring cells.
13. The BS of claim 9, wherein the indication of the doppler precompensation mode is used to combine the two or more consecutive synchronization signals among the plurality of sets of received doppler precompensated synchronization signals in the time domain during data channel reception or handoff.

Description

Method and apparatus for Doppler precompensation Technical Field The present disclosure relates generally to doppler precompensation and, more particularly, to doppler precompensation for large spot beam/cell sizes, particularly for different UEs at different radial positions from the center to the periphery of the spot beam/cell. Background In order to meet the increasing demand for wireless data traffic since the deployment of fourth generation (4G) communication systems, efforts have been made to develop improved fifth generation (5G) or pre-5G communication systems. The 5G or pre-5G communication system is also referred to as a "super 4G network" or a "Long Term Evolution (LTE) after-system. A 5G communication system is considered to be implemented in a higher frequency (millimeter wave) band, such as a 60 gigahertz (GHz) band, in order to achieve higher data rates. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna techniques are discussed for 5G communication systems. Further, in the 5G communication system, development of system network improvement is underway based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), reception-side interference cancellation, and the like. In 5G systems, hybrid Frequency Shift Keying (FSK) and FQAM (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Code Modulation (ACM), as well as Filter Bank Multicarrier (FBMC), non-orthogonal multiple access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access technologies. The internet, an artificially-centric connected network in which humans generate and consume information, is now evolving to the internet of things (IoT) in which distributed entities, such as things, exchange and process information without human intervention. Through connection with cloud servers, internet of everything (IoE) has emerged that combines IoT technology with big data processing technology. With technology elements, such as technology-connected networks that human generates and consumes information, ioT evolution with internet of things (IoT) implementations is now underway to cloud servers, sensor networks, machine-to-machine (M2M) communications, machine Type Communications (MTC), etc. have recently been investigated. Such IoT environments may provide intelligent internet technology services that create new value for human life by collecting and analyzing data generated between the interconnects. With the convergence and integration between existing Information Technology (IT) and various industrial applications, ioT may be applied in a variety of fields including smart homes, smart buildings, smart cities, smart cars or networked cars, smart grids, healthcare, smart appliances, and advanced medical services. In response to this, various attempts have been made to apply 5G communication systems to IoT networks. For example, techniques such as sensor networks, MTC, and M2M communication may be implemented by beamforming, MIMO, and array antennas. Application of the cloud RAN as the big data processing technology described above may also be considered as an example of a fusion between 5G technology and IoT technology. The discussion of 5G systems and their related techniques is for reference only, as certain embodiments of the present disclosure may be implemented in 5G systems, sixth generation (6G) systems, or even higher versions of the terahertz (THz) band may be used. However, the present disclosure is not limited to any particular class of systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in connection with any frequency band. For example, aspects of the present disclosure may also be applied to a 5G communication system, a 6G communication system, or a deployment of communication using THz frequency bands. Disclosure of Invention Technical solution The mechanisms and electronics for multi-valued doppler precompensation take into account various factors such as spot beam/cell size, doppler shift seen by the UE and/or doppler shift differences between different UEs within the spot beam/cell. Each of the plurality of doppler precompensation modes is used to perform doppler precompensation on the synchronization signal to generate a plurality of sets of doppler precompensated synchronization signals transmitted using one or more beams. In connection with initial access of a User Equipment (UE), idle UE cell reselection, connected UE data channel reception or UE handover, a signal indicating the doppler precompensation mode used is sent in one of a System Information Block (SIB) or a Radio Resource Control