BR-112019010660-B1 - METHODS FOR WIRELESS COMMUNICATIONS, APPLIANCES AND RELATED MEMORY

Abstract

Certain aspects of the present disclosure provide techniques for transmitting and processing channel state information (CSI) reference signals (CSI-RS). An exemplary method includes determining a configuration of channel state information reference signals (CSI-RSs), wherein the configuration indicates a set of resource elements (REs) to be used for the CSI-RSs and an initial mapping of CSI-RS ports to the set of REs; sending an indication of the CSI-RS configuration; and transmitting the CSI-RSs according to the determined configuration.

Inventors

• Yu Zhang
• Alexandros Manolakos
• Tao Luo
• June Namgoong

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260317

Application Date

20171202

Priority Date

20161202

Claims (15)

1. 1. Method (800) for wireless communications by a receiving-transmission point (110), comprising: determining (802) a configuration of channel state information reference signals, CSI-RSs, wherein the configuration indicates a set of resource elements, REs, to be used for the CSI-RSs and a first mapping of CSI-RS ports to the set of REs; sending (804) an indication of the CSI-RSs configuration; and transmitting (806) the CSI-RSs according to the determined configuration; characterized in that: the configuration indicates a combination of an orthogonal frequency division multiplexed symbol, OFDM, CSI-RSs and two OFDM CSI-RSs symbols in a partition.
2. 2. Method, according to claim 1, characterized in that the configuration additionally indicates orthogonal cover codes, OCCs, used to transmit CSI-RSs.
3. 3. A method according to claim 1, characterized in that it further comprises: signaling the configuration using at least one of the radio resource control signals, RRC, layer 2 signaling, L2, or layer 1 signaling, L1.
4. 4. Method, according to claim 1, characterized in that determining the configuration comprises: determining a series of REs to be used for a downlink transmission to a receiver; and selecting a group of REs, which are the last REs in time in the series of REs, for the set of REs to be used for the CSI-RSs.
5. 5. Method (900) for wireless communications by a user equipment (120), comprising: receiving (902) an indication of a configuration of channel state information reference signals, CSI-RSs, from a transmit receiving point, TRP, wherein the configuration indicates a set of resource elements, REs, to be used for the CSI-RSs and a first mapping of CSI-RS ports to the set of REs; processing (904) the CSI-RSs based on the indicated configuration to determine channel state information; and reporting (906) the channel state information to the TRP; characterized in that: the configuration indicates a combination of an orthogonal frequency division multiplexed symbol, OFDM, CSI-RSs and two OFDM CSI-RSs symbols in a partition.
6. 6. Method, according to claim 5, characterized in that the configuration additionally indicates orthogonal cover codes, OCCs, used to transmit CSI-RS.
7. 7. A method according to claim 5, characterized in that it further comprises: receiving the configuration using at least one of the radio resource control signals, RRC, layer 2 signaling, L2, or layer 1 signaling, L1.
8. 8. Apparatus for wireless communication via a transmit-receive point (110), comprising: means for determining a configuration of channel state information reference signals, CSI-RSs, wherein the configuration indicates a set of resource elements, REs, to be used for the CSI-RSs and a first mapping of CSI-RS ports to the set of REs; means for sending an indication of the CSI-RSs configuration; and means for transmitting the CSI-RSs according to the determined configuration; characterized in that: the configuration indicates a combination of an orthogonal frequency division multiplexed symbol, OFDM, CSI-RSs and two OFDM CSI-RSs symbols in a partition.
9. 9. Device according to claim 8, characterized in that the configuration additionally indicates orthogonal cover codes, OCCs, used to transmit CSI-RSs.
10. 10. Apparatus according to claim 8, characterized in that it further comprises: means for signaling the configuration using at least one of the radio resource control signals, RRC, layer 2 signaling, L2, or layer 1 signaling, L1.
11. 11. Apparatus, according to claim 8, characterized in that the means for determining the configuration comprise: means for determining a series of REs to be used for a downlink transmission to a receiver; and means for selecting a group of REs, which are the last REs in time in the series of REs, for the set of REs to be used for the CSI-RSs.
12. 12. Apparatus for wireless communication by a user equipment (120), comprising: means for receiving an indication of a channel state information reference signal configuration, CSI-RSs, from a transmit reception point, TRP, wherein the configuration indicates a set of resource elements, REs, to be used for the CSI-RSs and a first mapping of CSI-RS ports to the set of REs; means for processing the CSI-RSs based on the indicated configuration to determine channel state information; and means for reporting the channel state information to the TRP; characterized in that: the configuration indicates a combination of an orthogonal frequency division multiplexed symbol, OFDM, CSI-RSs and two OFDM CSI-RSs symbols in a partition.
13. 13. Device according to claim 12, characterized in that the configuration additionally indicates orthogonal cover codes, OCCs, used to transmit CSI-RS.
14. 14. Apparatus according to claim 12, characterized in that it further comprises: means for receiving the configuration using at least one of the radio resource control signals, RRC, layer 2 signaling, L2, or layer 1 signaling, L1.
15. 15. Computer-readable memory characterized in that it comprises instructions stored therein, the instructions being executable by a computer to perform the method steps defined in any one of claims 1 to 4 or 5 to 7.

Description

CROSS-REFERENCE TO RELATED ORDERS [0001] This Patent Application claims priority to International Application No. PCT/CN2016/108346, filed on December 2, 2016, which is assigned to the assignee of this application and is expressly incorporated herein by reference in its entirety. INTRODUCTION [0002] Aspects of the present disclosure relate generally to wireless communication systems, and more specifically, to the transmission of channel state information reference (CSI) signals (CSI-RSs) in a wireless network on new radio (NR). [0003] Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, message exchange, and broadcast. Typical wireless communication systems may utilize multiple access technologies capable of supporting communication with multiple users by sharing available system resources (such as bandwidth and transmission power). Examples of such multiple access technologies include Long Term Evolution (LTE) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SCFDMA) systems, and Synchronous Time Division Multiple Access (TD-SCDMA) systems. [0004] A wireless communication network may include a series of Nodes B that can support communication to a series of user equipment (UEs). A UE can communicate with a Node B via downlink and uplink. The downlink (or forward link) refers to the communication link from Node B to UE, and the uplink (or reverse link) refers to the communication link from UE to Node B. [0005] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different wireless devices to communicate at a municipal, national, regional, and even global level. An example of an emerging telecommunications standard is New Radio (NR, e.g., 5G radio access). NR is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). It is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, making use of new spectrum, and better integrating with other open standards that use OFDMA with a cyclic prefix (CP) on the downlink (DL) and uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there is a need for further improvement in NR technology. Ideally, these improvements should be applicable to other multiple access technologies and to the telecommunications standards that use these technologies. SUMMARY [0006] The systems, methods, and apparatus of the disclosure each have several aspects, none of which alone is solely responsible for its desirable attributes. Without limiting the scope of this disclosure expressed by the claims that follow, some features will be discussed briefly. After considering this discussion and particularly after reading the section entitled “Detailed Description,” it will be understood how the features of this disclosure provide advantages that include improved communications between access points and stations in a wireless network. [0007] Aspects of the present disclosure disclose a method for wireless communications. The method generally includes determining a configuration of channel state information reference signals (CSI-RSs), wherein the configuration indicates a set of resource elements (REs) to be used for the CSI-RSs and an initial mapping of CSI-RS ports to the set of REs, sending an indication of the CSI-RSs configuration, and transmitting the CSI-RSs according to the determined configuration. [0008] Aspects of the present disclosure disclose a method for wireless communications by a receiver. The method generally includes receiving an indication of a configuration of channel state information reference signals (CSI-RSs) from a transmit receiving point (TRP), wherein the configuration indicates a set of resource elements (REs) to be used for the CSI-RSs and an initial mapping of CSI-RS ports to the set of REs, processing the CSI-RSs according to the configuration to determine the channel state information, and reporting the channel state information to the TRP. [0009] Aspects of the present disclosure disclose an apparatus for wireless communications. The apparatus generally includes a device for determining a configuration of channel state information reference signals (CSI-RSs), wherein the configuration indicates a set of resource elements (REs) to be used for the CSI-RSs and an initial mapping of CSI-RS ports to the set of REs, a device for sending an indication of the configuration of the CSI-RSs, and a device for transmitting the CSI-RSs accordi