CN-122027085-A - Downlink transmission for high speed scenarios

Abstract

Described herein are techniques related to downlink transmissions for high speed scenarios. In one embodiment, a method includes decoding a Transmission Configuration Indicator (TCI) configuration element (IE) associated with a Physical Downlink Shared Channel (PDSCH) or a Physical Downlink Control Channel (PDCCH), the TCI configuration IE including a first Tracking Reference Signal (TRS) configuration having a first non-zero power channel state information reference signal (NZP-CSI-RS) resource Identity (ID) and a quasi-co-located (QCL) type value set to typeA, and a second TRS configuration having a second NZP-CSI-RS resource ID and a QCL type value set to typeA, determining that the Tracking Reference Signal (TRS) is associated with the PDSCH or PDCCH based on the TCI configuration IE, determining a parameter based on the TRS, and decoding the PDSCH or PDCCH based on the determined parameter. Other embodiments may be described and claimed.

Inventors

• A. Davidov

Assignees

• 英特尔公司

Dates

Publication Date

20260512

Application Date

20210127

Priority Date

20200127

Claims (16)

1. 1. An apparatus, comprising: interface circuitry, and Processor circuitry coupled with the interface circuitry, Wherein the processor circuitry is to: receiving, via the interface circuitry, a Code Division Multiplexing (CDM) group of demodulation reference signals (DM-RSs) carried by a Physical Downlink Shared Channel (PDSCH) from different Transmission Reception Points (TRPs), wherein the CDM group is associated with a Transmission Configuration Indicator (TCI) state associated with a Tracking Reference Signal (TRS); Determining parameters based on the TRSs associated with the TCI states associated with the CDM group, the parameters including one or more of doppler shift, timing offset, doppler spread, delay spread, and spatial reception parameters; Based on the DM-RS transmitted in the CDM group, the data signal carried by the PDSCH is demodulated.
2. 2. The apparatus of claim 1, the apparatus supporting a Single Frequency Network (SFN) mode having TRSs from different TRPs.
3. 3. The apparatus of any of claims 1 or 2, wherein the CDM group is a single CDM group associated with multiple TCI states, each TCI state comprising a TRS configuration.
4. 4. The apparatus of claim 3, wherein the corresponding transmission scheme configuration is included in a higher layer parameter.
5. 5. The apparatus of any of claims 1 or 2, wherein the CDM group comprises a first CDM group from a first TRP and a second CDM group from a second TRP, and wherein the first CDM group is associated with a first TCI state ID associated with a first TRS and the second CDM group is associated with a second TCI state ID associated with a second TRS.
6. 6. The apparatus of claim 5, wherein DM-RS antenna ports are associated with PDSCH antenna ports through a DM-RS to PDSCH precoder, and a number of DM-RS antenna ports is greater than or equal to a number of multiple-input multiple-output (MIMO) layers used to transmit the PDSCH.
7. 7. The apparatus of claim 6, wherein the DM-RS to PDSCH precoder varies in a predetermined manner in frequency and time domains.
8. 8. The apparatus of claim 6, in which the DM-RS to PDSCH precoder is based on a predetermined sequence of precoding resource block group (PRG) indices and/or slot indices with the PDSCH transmissions.
9. 9. An apparatus, comprising: interface circuitry, and Processor circuitry coupled with the interface circuitry, Wherein the processor circuitry is to: Code Division Multiplexing (CDM) groups generating demodulation reference signals (DM-RS); associating the CDM group with a Transmission Configuration Indicator (TCI) state associated with a Tracking Reference Signal (TRS); the CDM group is transmitted on a Physical Downlink Shared Channel (PDSCH) from different Transmission and Reception Points (TRPs) via the interface circuitry.
10. 10. The apparatus of claim 9, the apparatus supports a Single Frequency Network (SFN) mode having TRSs from different TRPs.
11. 11. The apparatus of any of claims 9 or 10, wherein the CDM group is a single CDM group associated with multiple TCI states, each TCI state comprising a TRS configuration.
12. 12. The apparatus of claim 11, wherein the corresponding transmission scheme configuration is included in a higher layer parameter.
13. 13. The apparatus of any of claims 9 or 10, wherein the CDM group comprises a first CDM group from a first TRP and a second CDM group from a second TRP, and wherein the first CDM group is associated with a first TCI state ID associated with a first TRS and the second CDM group is associated with a second TCI state ID associated with a second TRS.
14. 14. The apparatus of claim 13, wherein DM-RS antenna ports are associated with PDSCH antenna ports through a DM-RS to PDSCH precoder and a number of DM-RS antenna ports is greater than or equal to a number of multiple-input multiple-output (MIMO) layers used to transmit the PDSCH.
15. 15. The apparatus of claim 14, wherein the DM-RS to PDSCH precoder varies in a predetermined manner in frequency and time domains.
16. 16. The apparatus of claim 14, in which the DM-RS to PDSCH precoder is based on a predetermined sequence of precoding resource block group (PRG) indices and/or slot indices with the PDSCH transmissions.

Description

Downlink transmission for high speed scenarios Technical Field Various embodiments herein relate generally to the field of wireless communications, and more particularly, to downlink transmissions for high-speed scenarios. Background Mobile communications have evolved significantly from early voice systems to today's highly complex integrated communication platforms. The next generation wireless communication system 5G (or new air interface (NR)) will enable various users and applications to access information and share data anywhere and anytime. NR is expected to be a unified network/system aimed at meeting distinct and sometimes conflicting performance dimensions and services. These different multidimensional requirements are driven by different services and applications. Generally, NR will be based on 3GPP (third generation partnership project) LTE (long term evolution) -Advanced evolution, with the addition of a potential new Radio Access Technology (RAT), enriching people's lives through a better, simple and seamless radio connection solution. NR will enable everything to be connected by wireless and provide fast, rich content and services. Drawings The features and advantages of the present disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which together illustrate, by way of example, the features of the present disclosure, and in which: Fig. 1 is an illustration of a High Speed Train (HST) deployment scenario according to an example. Figure 2 is a graphical representation of block error rate (BLER) performance at different power offsets. Fig. 3 is an illustration of a distributed reference signal based Single Frequency Network (SFN) scheme in accordance with an example. Fig. 4 illustrates an example of two Transmission Configuration Indicator (TCI) status Identifications (IDs) associated with demodulation reference signals (DM-RS) of a single Code Division Multiplexing (CDM) group according to an embodiment. Fig. 5 illustrates an example of Physical Downlink Shared Channel (PDSCH) and demodulation reference signal (DM-RS) transmissions with different numbers of multiple-input multiple-output (MIMO) layers/DM-RS ports according to an embodiment. Fig. 6 illustrates an example process for downlink transmission for a high speed scenario, according to some embodiments. Fig. 7 illustrates another example process for downlink transmission for a high speed scenario, according to some embodiments. Fig. 8 illustrates another example process for downlink transmission for a high speed scenario, according to some embodiments. Fig. 9 illustrates another example process for downlink transmission for a high speed scenario, according to some embodiments. Fig. 10 illustrates another example process for downlink transmission for a high speed scenario, according to some embodiments. Fig. 11 illustrates a network in accordance with various embodiments. Fig. 12 schematically illustrates a wireless network in accordance with various embodiments. Fig. 13 is a block diagram illustrating components capable of reading instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and performing any one or more of the methods discussed herein, according to some example embodiments. Reference will now be made to the exemplary embodiments illustrated, and specific language will be used herein to describe the same. It will nevertheless be understood that no limitation of the scope of the technology is thereby intended. Detailed Description The following detailed description refers to the accompanying drawings. The same reference numbers may be used in different drawings to identify the same or similar elements. In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular structures, architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the various aspects of the claimed embodiments. However, it will be apparent to one having ordinary skill in the art having had the benefit of the present disclosure that the various aspects of the embodiments claimed may be practiced in other examples that depart from these specific details. In certain instances, descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the embodiments of the present disclosure with unnecessary detail. Various aspects of the illustrative embodiments will be described using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. However, it will be apparent to those skilled in the art that alternative embodiments may be practiced with only some of the described aspects. For purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the illustr