FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication, and more specifically to techniques and apparatuses for scrambling sequence generation for multi-transmit receive points.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmit power, or the like, or a combination thereof). Examples of such multiple-access technologies include 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 (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments (UEs) to communicate on a municipal, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM or SC-FDM (for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in LTE and NR technologies. Preferably, these improvements are applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

In a wireless network, a UE may be communicatively connected to multiple transmit receive points (TRPs), referred to as a multi-TRP configuration (or more simply “a multi-TRP”), and may transmit communications to, or receive communications from, the multiple TRPs. In some cases, a TRP may scramble data that is to be included in a downlink communication for purposes of interference rejection at another TRP of the multi-TRP, for purposes of avoidance of undesired signal spectrum properties, or the like. However, a scrambling sequence used by the TRP may be used by one or more other TRPs of the multi-TRP. For example, if two of the TRPs use the same cell identifier, use overlapping frequency and time allocation, and are assigned the same codeword index, the two TRPs may generate the same downlink scrambling sequence initialization code, which in turn may be used to generate the same downlink scrambling sequence. Use of the same scrambling sequence may degrade or inhibit the UE's ability to reject interference caused by transmission of a first downlink communication by one of the two TRPs when receiving a second downlink communication that is transmitted by the other of the two TRPs. This, in turn, degrades performance on the wireless communication link between the second TRP and the UE.

SUMMARY

In some aspects, a method of wireless communication, performed by a user equipment (UE), may include receiving, from a first transmit receive point (TRP), a downlink control information (DCI) communication, wherein the UE is included in a multi-TRP configuration with the first TRP and a second TRP. The method may include identifying, in the DCI communication, information that is unique to the first TRP. The method may include generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The method may include generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the UE is to use the downlink scrambling sequence to descramble a downlink communication received from the first TRP.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive, from a first TRP, a DCI communication, wherein the UE is included in a multi-TRP configuration with the first TRP and a second TRP. The memory and the one or more processors may be configured to identify, in the DCI communication, information that is unique to the first TRP. The memory and the one or more processors may be configured to generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The memory and the one or more processors may be configured to generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the UE is to use the downlink scrambling sequence to descramble a downlink communication received from the first TRP.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to receive, from a first TRP, a DCI communication, wherein the UE is included in a multi-TRP configuration with the first TRP and a second TRP. The one or more instructions, when executed by one or more processors of the UE, may cause the one or more processors to identify, in the DCI communication, information that is unique to the first TRP. The one or more instructions, when executed by one or more processors of the UE, may cause the one or more processors to generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The one or more instructions, when executed by one or more processors of the UE, may cause the one or more processors to generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the UE is to use the downlink scrambling sequence to descramble a downlink communication received from the first TRP.

In some aspects, an apparatus for wireless communication may include means for receiving, from a first TRP, a DCI communication, wherein the apparatus is included in a multi-TRP configuration with the first TRP and a second TRP. The apparatus may include means for identifying, in the DCI communication, information that is unique to the first TRP. The apparatus may include means for generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The apparatus may include means for generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the apparatus is to use the downlink scrambling sequence to descramble a downlink communication received from the first TRP.

In some aspects, a method of wireless communication, performed by a first TRP, may include identifying information, to be transmitted in a DCI communication to a UE, that is unique to the first TRP, wherein the first TRP is included in a multi-TRP configuration with the UE and a second TRP. The method may include generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The method may include generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the first TRP is to use the downlink scrambling sequence to scramble a downlink communication that is to be transmitted, by the first TRP, to the UE.

In some aspects, a first TRP for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify information, to be transmitted in a DCI communication to a UE, that is unique to the first TRP, wherein the first TRP is included in a multi-TRP configuration with the UE and a second TRP. The memory and the one or more processors may be configured to generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The memory and the one or more processors may be configured to generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the first TRP is to use the downlink scrambling sequence to scramble a downlink communication that is to be transmitted, by the first TRP, to the UE.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a first TRP, may cause the one or more processors to identify information, to be transmitted in a DCI communication to a UE, that is unique to the first TRP, wherein the first TRP is included in a multi-TRP configuration with the UE and a second TRP. The one or more instructions, when executed by one or more processors of the first TRP, may cause the one or more processors to generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information that is unique to the first TRP. The one or more instructions, when executed by one or more processors of the first TRP, may cause the one or more processors to generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP, wherein the first TRP is to use the downlink scrambling sequence to scramble a downlink communication that is to be transmitted, by the first TRP, to the UE.

In some aspects, an apparatus for wireless communication may include means for identifying information, to be transmitted in a DCI communication to a UE, that is unique to the apparatus, wherein the apparatus is included in a multi-TRP configuration with the UE and a TRP. The apparatus may include means for generating a downlink scrambling sequence initialization code, associated with the apparatus, based at least in part on the information that is unique to the apparatus. The apparatus may include means for generating a downlink scrambling sequence, associated with the apparatus, based at least in part on the downlink scrambling sequence initialization code associated with the apparatus, wherein the apparatus is to use the downlink scrambling sequence to scramble a downlink communication that is to be transmitted, by the apparatus, to the UE.

In some aspects, a method of wireless communication, performed by a UE, may include receiving, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; determining information associated with the DCI communication, the information associated with the DCI communication being unique to the first TRP; generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; determine information associated with the DCI communication, the information associated with the DCI communication being unique to the first TRP; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: receive, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; determine information associated with the DCI communication, the information associated with the DCI communication being unique to the first TRP; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, an apparatus for wireless communication may include means for receiving, from a first TRP, a DCI communication, the apparatus being included in a multi-TRP configuration with the first TRP and a second TRP; means for determining information associated with the DCI communication, the information associated with the DCI communication being unique to the first TRP; means for generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and means for generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a method of wireless communication, performed by a first TRP, may include identifying information associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP, the information associated with the DCI being unique to the first TRP; generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a TRP for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify information associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP, the information associated with the DCI being unique to the first TRP; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a TRP, may cause the one or more processors to: identify information associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP, the information associated with the DCI being unique to the first TRP; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information associated with the DCI; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, an apparatus for wireless communication may include means for identifying information associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the apparatus and a TRP, the information associated with the DCI being unique to the apparatus; means for generating a downlink scrambling sequence initialization code, associated with the apparatus, based at least in part on the information associated with the DCI; and means for generating a downlink scrambling sequence, associated with the apparatus, based at least in part on the downlink scrambling sequence initialization code associated with the apparatus.

In some aspects, a method of wireless communication, performed by a UE, may include receiving, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; identifying information unique to the first TRP, the information unique to the first TRP being at least one of associated with the DCI communication or included in the DCI communication; generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; identify information unique to the first TRP, the information unique to the first TRP being at least one of associated with the DCI communication or included in the DCI communication; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to receive, from a first TRP, a DCI communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP; identify information unique to the first TRP, the information unique to the first TRP being at least one of associated with the DCI communication or included in the DCI communication; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, an apparatus for wireless communication may include means for receiving, from a first TRP, a DCI communication, the apparatus being included in a multi-TRP configuration with the first TRP and a second TRP; means for identifying information unique to the first TRP, the information unique to the first TRP being at least one of associated with the DCI communication or included in the DCI communication; means for generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and means for generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a method of wireless communication, performed by a first TRP, may include identifying information unique to the first TRP, the information unique to the first TRP being at least one of associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP or included in the DCI communication; generating a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generating a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a TRP for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify information unique to the first TRP, the information unique to the first TRP being at least one of associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP or included in the DCI communication; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a TRP, may cause the one or more processors to identify information unique to the first TRP, the information unique to the first TRP being at least one of associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP or included in the DCI communication; generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP; and generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP.

In some aspects, an apparatus for wireless communication may include means for identifying information unique to the first TRP, the information unique to the first TRP being at least one of associated with a DCI communication to be transmitted to a UE included in a multi-TRP configuration with the first TRP and a second TRP or included in the DCI communication; means for generating a downlink scrambling sequence initialization code, associated with the apparatus, based at least in part on the information unique to the first TRP; and means for generating a downlink scrambling sequence, associated with the apparatus, based at least in part on the downlink scrambling sequence initialization code associated with the apparatus.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

