US-12621061-B2 - Handling interference in multi-radio access technology (RAT) wireless transmit/receive unit (WTRU)

US12621061B2US 12621061 B2US12621061 B2US 12621061B2US-12621061-B2

Abstract

Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology (RAT) and/or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.

Inventors

Robert L. Olesen
Rui Yang
Moon-Il Lee
Alphan Sahin
Hanqing Lou
Fengjun Xi
Frank La Sita
Byung K. Yi
Janet A. Stern-Berkowitz

Assignees

INTERDIGITAL PATENT HOLDINGS, INC.

Dates

Publication Date: 20260505
Application Date: 20240628

Claims (13)

1 . A wireless transmit/receive unit (WTRU) comprising a processor and memory configured to: receive information that indicates a first set of downlink resources associated with a downlink transmission that uses a New Radio (NR) radio access technology, wherein at least a portion of spectrum utilized by the NR radio access technology is shared with a Long Term Evolution (LTE) radio access technology; receive, from a base station via a transceiver using the NR radio access technology, configuration information associated with the LTE radio access technology, wherein the configuration information received using the NR radio access technology indicates cell-specific reference signal transmission information for the LTE radio access technology; determine that a subset of the first set of downlink resources associated with the downlink transmission that uses the NR radio access technology overlaps with a second set of resources associated with a cell-specific reference signal transmission for the LTE radio access technology based on the cell-specific reference signal transmission information for the LTE radio access technology indicated by the configuration information received using the NR radio access technology; and receive, from the base station via the transceiver, the downlink transmission that uses the NR radio access technology, wherein the downlink transmission is not received on the subset of the first set of downlink resources on the NR radio access technology that overlaps with the second set of resources associated with the cell-specific reference signal transmission for the LTE radio access technology.
2 . The WTRU of claim 1 , wherein the downlink transmission comprises a physical downlink shared data channel (PDSCH) transmission.
3 . The WTRU of claim 1 , wherein the first set of downlink resources overlaps with the second set of resources in time and frequency.
4 . The WTRU of claim 1 , wherein to receive the downlink transmission on the NR radio access technology via resources of the first set of downlink resource elements that do not overlap with the second set of resources, the processor is further configured to decode the downlink transmission on the NR radio access technology on resources of the first set of downlink resources that do not overlap with the second set of resources.
5 . The WTRU of claim 1 , wherein the processor is further configured to determine that the cell-specific reference signal transmission on the LTE radio access technology has a priority that is higher than the downlink transmission on the NR radio access technology.
6 . The WTRU of claim 1 , wherein the portion of the spectrum utilized by the NR radio access technology that is shared with the LTE radio access technology comprises an overlapping portion of a 20 MHz LTE bandwidth and a 100 MHz NR bandwidth.
7 . The WTRU of claim 1 , wherein the configuration information comprises a multicast-broadcast single-frequency network (MBSFN) subframe configuration, and wherein the subset of the first set of downlink resources is further determined based on the MBSFN subframe configuration.
8 . A method implemented in a wireless transmit/receive unit (WTRU), the method comprising: receiving information that indicates a first set of downlink resources associated with a downlink transmission that uses a New Radio (NR) radio access technology, wherein at least a portion of spectrum utilized by the NR radio access technology is shared with a Long Term Evolution (LTE) radio access technology; receiving, from a base station via a transceiver using the NR radio access technology, configuration information associated with the LTE radio access technology, wherein the configuration information received using the NR radio access technology indicates cell-specific reference signal transmission information for the LTE radio access technology; determining that a subset of the first set of downlink resources associated with the downlink transmission that uses the NR radio access technology overlaps with a second set of resources associated with a cell-specific reference signal transmission for the LTE radio access technology based on the cell-specific reference signal transmission information for the LTE radio access technology indicated by the configuration information received using the NR radio access technology; and receiving, from the base station via the transceiver, the downlink transmission that uses the NR radio access technology, wherein the downlink transmission is not received on the subset of the first set of downlink resources on the NR radio access technology that overlaps with the second set of resources associated with the cell-specific reference signal transmission for the LTE radio access technology.
9 . The method of claim 8 , wherein the downlink transmission comprises a physical downlink shared data channel (PDSCH) transmission.
10 . The method of claim 8 , wherein the first set of downlink resources overlaps with the second set of resources in time and frequency.
11 . The method of claim 8 , wherein receiving the downlink transmission on the NR radio access technology via resources of the first set of downlink resources that do not overlap with the second set of resources comprises decoding the downlink transmission on the NR radio access technology on resources of the first set of downlink resource elements that do not overlap with the second set of resources.
12 . The method of claim 8 , further comprising determining that the cell-specific reference signal transmission on the LTE radio access technology has a priority that is higher than the downlink transmission on the NR radio access technology.
13 . The method of claim 8 , wherein the configuration information comprises a multicast-broadcast single-frequency network (MBSFN) subframe configuration, and wherein the subset of the first set of downlink resources is further determined based on the MBSFN subframe configuration.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. Non-Provisional application Ser. No. 16/066,577, filed on Jun. 27, 2018, which is the National Stage entry under 35 U.S.C. § 371 of Patent Cooperation Treaty Application PCT/US2016/069093, filed Dec. 29, 2016, which claims the benefit of U.S. Provisional Patent Application No. 62/339,335, filed on May 20, 2016, and U.S. Provisional Patent Application No. 62/272,936, filed on Dec. 30, 2015, the entire contents of which are incorporated herein by reference. BACKGROUND Mobile communication may employ multiple-input and multiple-output, or MIMO. MIMO may multiply the capacity of a radio link using multiple transmit and receive antennas to exploit multipath propagation. MIMO may employ the use of multiple antennas at the transmitter and the receiver. MIMO may also employ techniques for sending and receiving more than one data signal simultaneously, perhaps over the same radio link, by exploiting multipath propagation. Mobile communication is in continuous evolution and is at the doorstep of a fifth incarnation—5G. SUMMARY Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology (RAT) and a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT. A WTRU may be configured to utilize a dynamic RAT configuration. For example, the WTRU may be configured with a primary RAT and a secondary RAT. The secondary RAT may be determined based on an indication from the primary RAT. A WTRU may be configured to report a preferred RAT. For example, a WTRU may select one or more preferred RATs based on one or more criteria (e.g., measurements) and may report a preferred RAT out of a plurality of RATs that may be used for a multi-RAT transmission. A WTRU may be configured to use a directed RAT and/or a RAT otherwise specified by the network. For example, a WTRU may send a probe signal which may be associated with a certain RAT (e.g., a preferred RAT) using a known uplink resource. The WTRU may receive a confirmation signal that is transmitted based on the RAT indicated by the probe signal. As an example, one RAT may correspond to a Long Term Evolution (LTE) RAT (e.g., a first RAT that, for example, utilizes OFDMA) and a second RAT may correspond to a new RAT (NR) that may be used for 5G communications. The WTRU may be configured to coordinate transmissions to and/or from a first RAT (e.g., LTE) and a second RAT (e.g., a NR), for example, using partial resource puncturing to ensure a desired signal reception quality is met for higher priority transmission. The WTRU may be configured to determine a RAT signal type (e.g., a NR RAT signal type) based on whether or not the resources utilized for transmission of the RAT signal overlap with the signal from another RAT (e.g., such as whether it overlaps with an LTE RAT signal). The WTRU may be configured to determine one or more of the type of waveform, the numerology for the RAT, the RAT frame structure, and/or the RAT multiple access scheme based on the RAT signal type (e.g., the NR signal type). The WTRU may be configured to receive a downlink control channel that is used for dynamic cross-RAT scheduling. For example, a RAT flag in the downlink control channel may indicate which RAT the downlink control information (DCI) is applicable to. The WTRU may interpret the downlink control channel based on a primary RAT configuration or secondary RATs configuration (e.g., depending on which RAT the DCI is determined to be applicable to). Sounding Reference Signal (SRS) transmission for one or more, or multiple, RATs (e.g., LTE and NR) be performed in a coordination set and/or the WTRU may be configured to determine an appropriate RAT to use for an SRS transmission. A wireless transmit/receive unit (WTRU) may comprise a memory. The WTRU may comprise a receiver. The receiver may be configured to receive a first configuration. The first configuration may include one or more first resources for communication via a first radio access technology (RAT). The receiver may be configured to receive a second configuration. The second configuration may include one or more second resources for communication via at least one of the first RAT or a second RAT. The WTRU may comprise a processor. The processor may be configured to associate the one or more first resources with the first RAT. The processor may be configured to associate the one or more second resources with the first RAT and the second RAT, such that a first signal communicated via the first RAT and a second signal communicated via the second RAT may overlap in at least one of the one or more second resources. The receiver may be further