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CN-120342561-B - Transmitting apparatus, receiving apparatus and method thereof

CN120342561BCN 120342561 BCN120342561 BCN 120342561BCN-120342561-B

Abstract

The present invention relates to a transmitting device (100) and a receiving device (300) of a wireless communication system (500). The transmitting device is configured to transmit one or more synchronization signals on a carrier to at least one receiving device, wherein a frequency of a synchronization signal of the one or more synchronization signals is located on a first frequency grid, a carrier frequency of the carrier is disposed on a second frequency grid, and frequencies of two different synchronization signals of the one or more synchronization signals are located at different frequency positions in the first grid, and to transmit an indication of the carrier frequency to at least one receiving device (300), wherein the indication comprises at least one integer. The receiving device (300) is configured to obtain a carrier frequency based on the at least one integer. The invention further relates to a corresponding method and a computer program.

Inventors

  • Frank Burgen
  • SONG XINGHUA

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20170810

Claims (17)

  1. 1. A method for a transmitting device, the method comprising: Transmitting one or more synchronization signals on a carrier to at least one receiving device, wherein a frequency of a synchronization signal of the one or more synchronization signals is located on a first frequency grid, a carrier frequency of the carrier is disposed on a second frequency grid, and And transmitting an indication of the carrier frequency to the at least one receiving device, wherein the indication comprises at least one integer, the at least one integer being a first index indicating a first frequency position relative to the frequency of the synchronization signal and a second index indicating a position of the carrier frequency relative to the first frequency position.
  2. 2. A method for a receiving device, the method comprising: Receiving one or more synchronization signals on a carrier from a transmitting device, wherein the frequencies of the synchronization signals in the one or more synchronization signals are located on a first frequency grid, and the carrier frequency of the carrier is deployed on a second frequency grid; Receiving an indication of the carrier frequency from the transmitting device, wherein the indication comprises at least one integer, the at least one integer being a first index indicating a first frequency position relative to the frequency of the synchronization signal and a second index indicating a position of the carrier frequency relative to the first frequency position, and The carrier frequency is obtained based on the at least one integer.
  3. 3. The method according to claim 1 or 2, wherein the frequency interval between two adjacent synchronization signals is a multiple of the subcarrier spacing of the wireless communication system.
  4. 4. The method of claim 1 or 2, wherein the first frequency grid is a subset of the second frequency grid.
  5. 5. The method of any of claims 1 to 4, wherein the first frequency location is given in the number of physical resource blocks and the location of the carrier frequency is given in the resolution of the second frequency grid.
  6. 6. The method of any of claims 1 to 4, wherein the first frequency location is given at a resolution of the first frequency grid and the location of the carrier frequency is given at a resolution of the second frequency grid.
  7. 7. The method according to any one of claim 1 to 6, The indication is transmitted in at least one of a Master Information Block (MIB), remaining system information (RMSI), other System Information (OSI), and Radio Resource Control (RRC).
  8. 8. The method of any of claims 1 to 4, wherein the first frequency location is given in a number of physical resource blocks and the second index provides a location of the carrier frequency within a physical resource block.
  9. 9. The method of any of claims 1 to 8, wherein the carrier frequency is equal to a center frequency of the carrier.
  10. 10. The method of any of claims 1 to 8, wherein the carrier frequency is not equal to a center frequency of the carrier.
  11. 11. The method of any of claims 1 to 10, the frequency band in which the carrier is located comprising values determined from the first frequency grid and the second frequency grid.
  12. 12. The method of any of claims 1 to 11, and wherein frequencies of two different ones of the one or more synchronization signals are located at different frequency locations in the first frequency grid.
  13. 13. A computer program product having a program code, the computer program product comprising a computer program for performing the method according to any of claims 1 to 12 when the computer program runs on a computer.
  14. 14. A computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 12.
  15. 15. An apparatus, comprising: a memory for storing a computer program, and A processor for calling and running the computer program from the memory to perform the method of any of claims 1 to 12.
  16. 16. A communication system, comprising: Apparatus for performing the method of claim 1, or any one of claims 3 to 12 when dependent on claim 1, and apparatus for performing the method of claim 2, or any one of claims 3 to 12 when dependent on claim 2.
  17. 17. A communication device comprising means for performing the method of any of claims 1 to 12.

Description

Transmitting apparatus, receiving apparatus and method thereof The present application is a divisional application, the application number of the original application is 201780093835.8, the original application date is 2017, month 08 and 10, and the whole content of the original application is incorporated by reference. Technical Field The present invention relates to a transmitting apparatus and a receiving apparatus. The invention further relates to a corresponding method and a computer program. Background In the 3GPP New Radio (NR), the synchronization signal (Synchronization Signal, SS) block includes an NR-primary synchronization signal (NR-Primary Synchronization Signal, NR-PSS), an NR-secondary synchronization signal (NR-Secondary Synchronization Signal, NR-SSS), and an NR-physical broadcast channel (NR-Physical Broadcast Channel, NR-PBCH). After detecting the synchronization signal block, a User Equipment (UE) can synchronize with a cell and obtain a cell ID of the cell and broadcast information. Broadcast Information, e.g., an NR master Information block (NR-Master Information Block, NR-MIB), may further include Information that enables the UE to detect an NR-physical downlink shared channel (NR-Physical Downlink SHARED CHANNEL, NR-PDSCH) to obtain system Information, e.g., remaining system Information (REMAINING SYSTEM Information, RMSI) and other system Information (Other System Information, OSI). The NR-PBCH may include information on control channel resources on which the UE may detect an NR-physical downlink control channel (NR-Physical Downlink Control Channel, NR-PDCCH) scheduled RMSI by the NR-PDSCH. The NR-PBCH should be received over a large coverage area and thus its payload should be minimized. Additional system information may be included in RMSI or OSI. In 3GPP NR, a synchronization signal block is located on a frequency grid (e.g., the center frequency of an SS block or SS is located on a grid), which is a set of frequencies, with a predefined interval between them. The frequency grid for the synchronization signal block (denoted herein as synchronization signal grid) may be different from the frequency grid for the NR channel (denoted herein as NR channel grid). The NR channel grid defines carrier frequencies (e.g., center frequencies of carriers) that can be used to deploy NR carriers. A carrier is understood to be an entity of a communication system comprising channels and signals for communication and may be deployed in downlink and uplink communications. The synchronization signal grid and the NR channel grid may be selected for different purposes. Thus, to reduce the search complexity of the UE, the synchronization signal grid may be, for example, more sparse than the NR channel grid. At least for initial cell selection, the UE searches for a synchronization signal on a synchronization signal grid. The synchronization signal grid may be, for example, a multiple of 15kHz, which is a subcarrier spacing (SubCarrier Spacing, SCS) in NR, such as 300kHz or 900kHz. The NR system will provide a different SCS, e.g. an SS may use 15, 30, 120 or 240kHz SCS. Additional SCS, such as 60kHz, may be suitable for other channels and signals. Furthermore, the synchronization signal grid may be different in different frequency bands, for example, 100kHz in a frequency band in which LTE and NR should coexist. Similarly, the NR channel grid may be different in different frequency bands, for example, 100kHz in a frequency band where LTE and NR should coexist, and may take on a larger value in a high frequency band where the amount of spectrum is larger. If the synchronization signal grid and the NR channel grid are different, the synchronization signal block may be considered not to be located near the center frequency of the NR carrier, e.g. the carrier frequency. Further, the NR carrier may include a plurality of synchronization signal blocks transmitted at different frequency positions. Thus, the synchronization signal grid may give synchronization signal frequency positions which are a subset of the channel frequencies, or which are not aligned at all with the channel frequencies, or which are aligned with the channel frequency portions. In conventional system 3GPP LTE, the synchronization signal is located near the center frequency of the carrier, and the synchronization signal grid is the same as the channel grid. Thus, the UE may implicitly determine the carrier frequency from the frequency location of the detected synchronization signal. The carrier frequency information allows the UE to perform one or more of the following non-limiting tasks: tuning the oscillator to the carrier frequency. Receiver filtering. Mobility measurements are made for cells characterized by a cell ID and carrier frequency. A plurality of synchronization signal blocks are detected and a determination is made as to which carrier the plurality of synchronization signal blocks belong. Determining the position of physica