Waveform switching mechanism for digital MMWAVE repeaters in higher bands

A (repeater) node may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. A waveform switch associated with the first link may be triggered by the base station or the node. A waveform switch associated with the second link may be triggered by the node or the UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The base station may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The node may execute the waveform switch associated with the first link or the second link.

TECHNICAL FIELD

The present disclosure relates generally to communication systems, and more particularly, to waveform switching in connection with a repeater node in a wireless communication system.

INTRODUCTION

BRIEF SUMMARY

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus waveform switching in connection with a repeater node are provided. The apparatus may be a (repeater) node. The apparatus may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a user equipment (UE). The waveform switch may correspond to a first switch from an orthogonal frequency division multiplexing (OFDM) waveform to a single carrier (SC) waveform or a second switch from the SC waveform to the OFDM waveform. The apparatus may execute the waveform switch associated with the first link or the second link.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus waveform switching in connection with a repeater node are provided. The apparatus may be a base station. The apparatus may identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The apparatus may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

DETAILED DESCRIPTION

Referring again toFIG.1, in certain aspects, the (repeater) node103may include a waveform switching component198that may be configured to identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The waveform switching component198may be configured to execute the waveform switch associated with the first link or the second link. In certain aspects, the base station180may include a waveform switching component199that may be configured to identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The waveform switching component199may be configured to transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

The OFDM-based waveform may be used for higher bands (e.g., FR4 and beyond), and may be backward compatible with the waveform choice for FR1/FR2/FR2x. In scenarios where the energy efficiency specification is more relaxed, the OFDM-based waveform may offer a high spectral efficiency. The SC waveform may be used for other scenarios that may specify a high energy efficiency. Hereinafter the SC waveform may refer to, for example, the SC-QAM waveform. With the SC waveform, the lower peak-to-average power ratio (PAPR) may translate into a higher power-added (PA) efficiency and an extended battery life. A high data rate may be achieved due to the massive spectrum availability.

To facilitate frequency domain equalization, the CP may be introduced into the SC waveform to create OFDM-like blocks or symbols.FIG.4Ais a diagram400A illustrating a composition of an SC waveform transmission including the pre-appended CP. A guard interval (GI), sometime referred to as a unique word (UW), may be considered a special case of the CP in this context.

Both the OFDM and the SC waveforms may be used for higher bands. Slot-level alignment may be provided between the OFDM and the SC waveforms. Symbol-level alignment may be provided as well. Common numerologies, which may be associated with common sampling rates or common FFT sizes, may be used to enable a uniform transceiver design.

FIG.4Bis a diagram400B illustrating various split options associated with repeaters. The repeaters may operate in a millimeter wave (mmWave) frequency range, and may be referred to as mmWave repeaters. An analog repeater may be based on the split option d (also known as the split option 9), which may operate below the RF layer, and may perform amplify and forward operations (in the analog domain). In contrast, a digital repeater may be based on the split option c through the split option a (also known as the split options 8, 7, and 6, respectively). In particular, the split option c may operate between the RF layer and the lower physical layer. The split option b may operate between the lower physical layer and the higher physical layer. The split option a may operate between the physical layer and the data link layer (in particular, between the higher physical layer and the MAC layer). The higher the layer the corresponding split option operates at, the more advanced the repeater may be. For example, a repeater based on the split option a may perform decoding and forwarding operations.

There may be a need for a waveform switch mechanism in digital mmWave repeaters for higher bands. The waveform switch may refer to a switch between the OFDM waveform and the SC waveform (i.e., either from the OFDM waveform to the SC waveform or from the SC waveform to the OFDM waveform). In higher bands, a waveform switch may be performed at a repeater for one or more of a number of reasons. The reasons may include, but are not limited to, UE capabilities, channel conditions or the operating band, phase noise or time-frequency errors, the power amplifier performance (the SC waveform is associated with a higher power amplifier efficiency), or the capability of the repeater to serve multiple UEs.

In some scenarios where digital mmWave repeaters are deployed, the link condition for the link between the base station and the repeater or the link condition for the link between the repeater and the UE may be improved through the switching of the waveforms. In such scenarios, a dynamic, semi-static, or static waveform switch may be triggered for improving or maintaining the link performance. Accordingly, one or more aspects may relate to a waveform switch mechanism in connection with a repeater including control signaling mechanisms. The waveform switch may be dynamic, semi-static, or static.

FIGS.5A and5Bare diagrams illustrating example environments500A and500B according to one or more aspects.FIG.5Aillustrates waveform switching in the link between a base station506and a (repeater) node504(i.e., the first link). The link between the node504and the UE502may be referred to as the second link. In one example configuration, the node504may communicate with a UE502and the base station506with a default waveform, e.g., the OFDM waveform or the SC waveform. To maintain or improve the performance of the first link, a waveform switch for the first link may be performed. In particular, the waveform used for the first link may be switched from the OFDM waveform to the SC waveform (or from the SC waveform to the OFDM waveform). In different configurations, the waveform switch may be triggered by the node504or the base station506.

In one example configuration, the default waveform for both the first link and the second link may be the OFDM waveform. After the waveform switch for the first link is triggered and executed, the waveform for the first link may switch from the OFDM waveform to the SC waveform. In the second link, the node504may continue to forward data using the default waveform (e.g., the OFDM waveform). For example, the node504may serve multiple UEs using OFDMA.

In another example configuration, the default waveform for both the first link and the second link may be the SC waveform. After the waveform switch for the first link is triggered and executed, the waveform for the first link may switch from the SC waveform to the OFDM waveform. In the second link, the node504may continue to forward data using the default waveform (e.g., the SC waveform).

FIG.5Billustrates waveform switching in the second link. In one example configuration, a node504may communicate with a UE502and a base station506with a default waveform, e.g., the OFDM waveform or the SC waveform. To maintain or improve the performance of the second link, a waveform switch for the second link may be performed. In particular, the waveform used for the second link may be switched from the OFDM waveform to the SC waveform (or from the SC waveform to the OFDM waveform). In different configurations, the waveform switch may be triggered by the node504or the UE502.

In one example configuration, the default waveform for both the first link and the second link may be the OFDM waveform. After the waveform switch for the second link is triggered and executed, the waveform for the second link may switch from the OFDM waveform to the SC waveform. In the first link, the base station506may continue to communicate with the node504using the default waveform (e.g., the OFDM waveform). If the node504serves multiple UEs and the waveform for the second link is switched from the OFDM waveform to the SC waveform, the base station506may provide an indication to the node504, such that subsequent to the waveform switch the node504may buffer multiple slots (due to the time division multiplexing (TDM) associated with the SC waveform used in the second link after the waveform switch, where, e.g., each UE may be assigned one respective slot), rather than one slot (which may be acceptable when the UEs are frequency division multiplexed (FDMed) when the OFDM waveform is used).

In another example configuration, the default waveform for both the first link and the second link may be the SC waveform. After the waveform switch for the second link is triggered and executed, the waveform for the second link may switch from the SC waveform to the OFDM waveform. In the first link, the base station506may continue to communicate with the node504using the default waveform (e.g., the SC waveform). As part of the waveform switching procedure, the base station506may signal, to the node504, a post-waveform switch resource mapping from the SC waveform used in the first link to the OFDM waveform used in the second link.

To execute the waveform switch (after receiving the proper signaling from the base station506), the node504may perform a mapping from the time and frequency resources of the default waveform (e.g., the OFDM waveform) to the time and frequency resource of the new/switched waveform (e.g., the SC waveform). The base station506may transmit to the node504the details of the mapping via a fronthaul (FH)-PDCCH (FH-PDCCH) on the Uu link. After performing the mapping, the node504may utilizes the same RF chain for transmission of the new/switched waveform. Not all the blocks in the transmitter chain may be used. For example, if SC-QAM is the new/switched waveform, then the IFFT block may not be used.

In one example configuration, the OFDM waveform may be used on the Uu link (i.e., the first link) and the node504may serve multiple UEs on the access link (i.e., the second link) using the OFDM waveform. In this case, if the node504receives an indication of or triggers a waveform switch on the access link, first, the node504may receive data intended for the UEs on the Uu link from the base station506using the OFDM waveform. Next, the node504may perform the mapping from the time/frequency grid of the OFDM waveform to the time grid of the SC-QAM waveform. The node504may buffer data intended for the multiple UEs, and then transmit them based on TDM (or spatial division multiplexing (SDM), or code division multiplexing (CDM)) since the SC-QAM waveform may not accommodate FDM.

FIG.6is a diagram600illustrating a signaling mechanism associated with a waveform switch in the first link. The waveform switch may be triggered by the base station506. The base station506may signal the waveform switch to the node504via dedicated signaling (e.g., an RRC message or a MAC-control element (CE) (MAC-CE)). An FH-PDCCH may be a physical layer control channel between the base station506and the node504. In this configuration, because the indication of the waveform switch is signaled via dedicated signaling (e.g., an RRC message or a MAC-CE), the FH-PDCCH may not contain the waveform switch information, as the waveform switch information is communicated through the dedicated signaling. The waveform switch information may include information about how the node504may, after the waveform switch, map resources in both time and frequency for the waveform used in the second link. Subsequent to the waveform switch in the first link, the node504may proceed to receive, from the base station506, one or more PDCCHs and/or PDSCHs intended for one or more UEs502using the new waveform in the first link, and may forward the one or more PDCCHs and/or PDSCHs to the one or more UEs502. The node504may receive and forward the uplink channels in a similar fashion (e.g., using the existing waveform in the second link and the new waveform in the first link).

FIG.7is a diagram700illustrating a signaling mechanism associated with a waveform switch in the first link. The waveform switch may be triggered by the base station506. The base station506may signal the waveform switch to the node504via an FH-PDCCH. The base station506may transmit the FH-PDCCH to the node504using the default waveform (e.g., the OFDM waveform) (i.e., the waveform used prior to the waveform switch). The FH-PDCCH may include an indication of the waveform switch. The FH-PDCCH may further include a resource mapping between the waveform used in the first link and the waveform used in the second link post-waveform switch. For example, in one configuration, if the node504serves multiple UEs502using the default OFDM waveform in the second link, and the waveform for the first link is to be switched from the OFDM waveform to the SC waveform based on a trigger provided by the base station506, the base station506may include in the FH-PDCCH information about how the node504may, after the waveform switch, map resources in both time and frequency for the OFDM waveform used in the second link.

After receiving and decoding the FH-PDCCH, the node504may monitor for and observe the waveform switch trigger. The node504may switch the waveform in the first link, and may proceed to receive, from the base station506, one or more PDCCHs and/or PDSCHs intended for one or more UEs502using the new waveform, and may forward the one or more PDCCHs and/or PDSCHs to the one or more UEs502. The node504may receive and forward the uplink channels in a similar fashion (e.g., using the existing waveform in the second link and the new waveform in the first link).

FIG.8is a diagram800illustrating a signaling mechanism associated with a waveform switch in the first link. The waveform switch may be triggered by the node504. The node504may signal the waveform switch to the base station506via FH feedback signaling (e.g., via an FH-PUCCH). In response to the indication of the waveform switch from the node504, the base station506may transmit an FH-PDCCH to the node504using the default waveform (e.g., the OFDM waveform) (i.e., the waveform used prior to the waveform switch). The FH-PDCCH may include a resource mapping between the waveform used in the first link and the waveform used in the second link post-waveform switch. For example, in one configuration, if the node504serves multiple UEs502using the default OFDM waveform in the second link, and the waveform for the first link is to be switched from the OFDM waveform to the SC waveform based on a trigger provided by the node504, the base station506may include in the FH-PDCCH information about how the node504may, after the waveform switch, map resources in both time and frequency for the OFDM waveform used in the second link. Upon receiving and decoding the FH-PDCCH including the resource mapping information, the node504may then switch the waveform in the first link, and may proceed to receive, from the base station506, one or more PDCCHs and/or PDSCHs intended for one or more UEs502using the new waveform, and may forward the one or more PDCCHs and/or PDSCHs to the one or more UEs502. The node504may receive and forward the uplink channels in a similar fashion (e.g., using the existing waveform in the second link and the new waveform in the first link).

FIG.9is a diagram900illustrating a signaling mechanism associated with a waveform switch in the second link. The waveform switch may be triggered by the node504. The node504may signal the waveform switch in the second link to the base station506via FH feedback signaling. In response to the indication of the waveform switch from the node504, the base station506may transmit an FH-PDCCH to the node504. The FH-PDCCH may include a resource mapping between the waveform used in the first link and the waveform used in the second link post-waveform switch. Upon receiving and decoding the FH-PDCCH including the resource mapping information, the node504may signal the waveform switch to the UE502via dedicated signaling (e.g., using the pre-waveform switch waveform). The dedicated signaling may include the waveform switch indication for the waveform switch in the second link. The node504may then switch the waveform in the second link, and may proceed to forward one or more PDCCHs and/or PDSCHs intended for one or more UEs502using the new waveform in the second link. The node504may receive and forward the uplink channels in a similar fashion (e.g., using the new waveform in the second link and the existing waveform in the first link).

FIG.10is a diagram1000illustrating a signaling mechanism associated with a waveform switch in the second link. The waveform switch may be triggered by the UE502. The UE502may signal the waveform switch to the node504via dedicated signaling (e.g., using the pre-waveform switch waveform). The dedicated signaling may include the waveform switch indication for the waveform switch in the second link. Upon receiving the indication of the waveform switch from the UE502, the node504may signal the waveform switch to the base station506via FH feedback signaling. In response to the indication of the waveform switch from the node504, the base station506may transmit an FH-PDCCH to the node504. The FH-PDCCH may include a resource mapping between the waveform used in the first link and the waveform used in the second link post-waveform switch. Upon receiving and decoding the FH-PDCCH including the resource mapping information, the node504may switch the waveform in the second link, and may proceed to forward one or more PDCCHs and/or PDSCHs intended for one or more UEs502using the new waveform in the second link. The node504may receive and forward the uplink channels in a similar fashion (e.g., using the new waveform in the second link and the existing waveform in the first link).

FIG.11is a diagram illustrating a communication flow1100of a method of wireless communication. The UE1102may correspond to the UE104/350/502. The (repeater) node1104may correspond to the node103/504. The base station1106may correspond to the base station102/180/310/506. In one configuration, a waveform switch in the first link between the base station506and the node504may be triggered by the base station506. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. At1122, the base station1106may identify a first indication of a waveform switch associated with a first link between the base station1106and a node1104. At1108, the base station1106may transmit, to the node1104, and the node1104may receive, from the base station1106, a first/second indication of the waveform switch. The first/second indication of the waveform switch1108may be transmitted and received via dedicated signaling (e.g., an RRC message or a MAC-CE) or an FH-PDCCH. At1120, the node1104may identify a first indication of a waveform switch associated with a first link between a base station1106and the node1104. At1124, the base station1106may transmit, to the node1104, and the node1104may receive, from the base station1106, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The post-waveform switch resource mapping1124may be transmitted and received via dedicated signaling (e.g., an RRC message or a MAC-CE) or an FH-PDCCH. At1126, the node1104and the base station1106may execute the waveform switch associated with the first link.

In one configuration, a waveform switch in the first link between the base station506and the node504may be triggered by the node504. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. At1120, the node1104may identify a first indication of a waveform switch associated with a first link between a base station1106and the node1104. At1110, the node1104may transmit, to the base station1106, and the base station1106may receive, from the node1104, a first/second indication of the waveform switch via an FH feedback message. The first/second indication of the waveform switch1110may be transmitted and received via an FH feedback message. At1122, the base station1106may identify a first indication of a waveform switch associated with a first link between the base station1106and a node1104. At1124, the base station1106may transmit, to the node1104, and the node1104may receive, from the base station1106, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The post-waveform switch resource mapping1124may be transmitted and received via an FH-PDCCH. At1126, the node1104and the base station1106may execute the waveform switch associated with the first link.

In one configuration, a waveform switch in the second link between the node504and the UE502may be triggered by the node504. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. At1120, the node1104may identify a first indication of a waveform switch associated with a second link between the node1104and a UE1102. At1112, the node1104may transmit, to the base station1106, and the base station1106may receive, from the node1104, a first/second indication of the waveform switch. The first/second indication of the waveform switch1112may be transmitted and received via an FH feedback message. At1114, the node1104may transmit, to the UE1102, a third indication of the waveform switch. The third indication of the waveform switch1114may be transmitted via dedicated signaling. At1122, the base station1106may identify a first indication of a waveform switch associated with a second link between the node1104and a UE1102. At1124, the base station1106may transmit, to the node1104, and the node1104may receive, from the base station1106, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The post-waveform switch resource mapping1124may be transmitted and received via an FH-PDCCH. At1128, the node1104and the UE1102may execute the waveform switch associated with the second link.

In one configuration, a waveform switch in the second link between the node504and the UE502may be triggered by the UE502. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. At1116, the node1104may receive, from the UE1102, the first indication of the waveform switch. The first indication of the waveform switch1116may be received via dedicated signaling. At1120, the node1104may identify a first indication of a waveform switch associated with a second link between the node1104and a UE1102. At1118, the node1104may transmit, to the base station1106, and the base station1106may receive, from the node1104, a first/second indication of the waveform switch. The first/second indication of the waveform switch1118may be transmitted and received via an FH feedback message. At1122, the base station1106may identify a first indication of a waveform switch associated with a second link between the node1104and a UE1102. At1124, the base station1106may transmit, to the node1104, and the node1104may receive, from the base station1106, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The post-waveform switch resource mapping1124may be transmitted and received via an FH-PDCCH. At1128, the node1104and the UE1102may execute the waveform switch associated with the second link.

In another configuration, a waveform switch in the second link between the node504and the UE502may be triggered by the base station506.

FIG.12is a flowchart1200of a method of wireless communication. The method may be performed by a (repeater) node (e.g., the node103/504/1104; the apparatus1602). At1202, the node may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. For example,1202may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1120, the node1104may identify a first indication of a waveform switch associated with a first link between a base station1106and the node1104or a second link between the node1104and a UE1102.

At1204, the node may execute the waveform switch associated with the first link or the second link. For example,1204may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1126or1128, the node1104may execute the waveform switch associated with the first link or the second link.

FIG.13is a flowchart1300of a method of wireless communication. The method may be performed by a (repeater) node (e.g., the node103/504/1104; the apparatus1602). At1302, the node may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. For example,1302may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1120, the node1104may identify a first indication of a waveform switch associated with a first link between a base station1106and the node1104or a second link between the node1104and a UE1102.

At1312, the node may execute the waveform switch associated with the first link or the second link. For example,1312may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1126or1128, the node1104may execute the waveform switch associated with the first link or the second link.

In one configuration, the waveform switch may be associated with the first link.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1108may be received from the base station1106.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1108may be received from the base station1106via an RRC message or a MAC-CE.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1108may be received from the base station1106via an FH-PDCCH.

In one configuration, referring back toFIG.11, the first indication of the waveform switch may be generated at the node1104.

In one configuration, at1304, the node may transmit, to the base station, a second indication of the waveform switch via an FH feedback message. For example,1304may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1110, the node1104may transmit, to the base station1106, a second indication of the waveform switch via an FH feedback message.

In one configuration, the waveform switch may be associated with the second link.

In one configuration, referring back toFIG.11, the first indication of the waveform switch may be generated at the node1104.

In one configuration, at1306, the node may transmit, to the base station, a second indication of the waveform switch. For example,1306may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1112, the node1104may transmit, to the base station1106, a second indication of the waveform switch. At1308, the node may transmit, to the UE, a third indication of the waveform switch. For example,1308may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1114, the node1104may transmit, to the UE1102, a third indication of the waveform switch.

In one configuration, referring back toFIG.11, the second indication of the waveform switch1112may be transmitted to the base station1106via an FH feedback message.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1116may be received from the UE1102.

In one configuration, at1306, the node may transmit, to the base station, a second indication of the waveform switch. For example,1306may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1118, the node1104may transmit, to the base station1106, a second indication of the waveform switch.

In one configuration, referring back toFIG.11, the second indication of the waveform switch1118may be transmitted to the base station1106via an FH feedback message.

In one configuration, at1310, the node may receive, from the base station, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. For example,1310may be performed by the waveform switching component1640inFIG.16. Referring toFIG.11, at1124, the node1104may receive, from the base station1106, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

In one configuration, referring back toFIG.11, the indication of the post-waveform switch resource mapping1124may be received from the base station1106via an FH-PDCCH.

FIG.14is a flowchart1400of a method of wireless communication. The method may be performed by a base station (e.g., the base station102/180/310/506/1106; the apparatus1702). At1402, the base station may identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. For example,1402may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1122, the base station1106may identify a first indication of a waveform switch associated with a first link between the base station1106and a node1104or a second link between the node1104and a UE1102.

At1404, the base station may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. For example,1404may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1124, the base station1106may transmit, to the node1104, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

FIG.15is a flowchart1500of a method of wireless communication. The method may be performed by a base station (e.g., the base station102/180/310/506/1106; the apparatus1702). At1502, the base station may identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. For example,1502may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1122, the base station1106may identify a first indication of a waveform switch associated with a first link between the base station1106and a node1104or a second link between the node1104and a UE1102.

At1506, the base station may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. For example,1506may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1124, the base station1106may transmit, to the node1104, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

In one configuration, the waveform switch may be associated with the first link.

In one configuration, at1508, the base station may execute the waveform switch associated with the first link. For example,1508may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1126, the base station1106may execute the waveform switch associated with the first link.

In one configuration, referring back toFIG.11, the first indication of the waveform switch may be generated at the base station1106. At1504, the base station may transmit, to the node, a second indication of the waveform switch. For example,1504may be performed by the waveform switching component1740inFIG.17. Referring toFIG.11, at1108, the base station1106may transmit, to the node1104, a second indication of the waveform switch.

In one configuration, referring back toFIG.11, the second indication of the waveform switch1108may be transmitted to the node1104via an RRC message or MAC-CE.

In one configuration, referring back toFIG.11, the second indication of the waveform switch1108may be transmitted to the node1104via an FH-PDCCH.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1110may be received from the node1104via an FH feedback message.

In one configuration, the waveform switch may be associated with the second link.

In one configuration, referring back toFIG.11, the first indication of the waveform switch1118may be received from the node1104via an FH feedback message.

In one configuration, referring back toFIG.11, the indication of the post-waveform switch resource mapping1124may be transmitted to the node1104via an FH-PDCCH.

FIG.16is a diagram1600illustrating an example of a hardware implementation for an apparatus1602. The apparatus1602may be a node, a repeater, a repeating device, a component of a (repeater) node, or may implement (repeater) node functionality. In some aspects, the apparatus1602may include a baseband unit1604. The baseband unit1604may communicate through a cellular RF transceiver1622with the UE104and the base station102/180. The baseband unit1604may include a computer-readable medium/memory. The baseband unit1604is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit1604, causes the baseband unit1604to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit1604when executing software. The baseband unit1604further includes a reception component1630, a communication manager1632, and a transmission component1634. The communication manager1632includes the one or more illustrated components. The components within the communication manager1632may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit1604.

The communication manager1632includes a waveform switching component1640that may be configured to identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE, e.g., as described in connection with1202inFIG.12and1302inFIG.13. The waveform switching component1640may be further configured to transmit, to the base station, a second indication of the waveform switch via an FH feedback message, e.g., as described in connection with1304inFIG.13. The waveform switching component1640may be further configured to transmit, to the base station, a second indication of the waveform switch, e.g., as described in connection with1306inFIG.13. The waveform switching component1640may be further configured to transmit, to the UE, a third indication of the waveform switch, e.g., as described in connection with1308inFIG.13. The waveform switching component1640may be further configured to receive, from the base station, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link, e.g., as described in connection with1310inFIG.13. The waveform switching component1640may be further configured to execute the waveform switch associated with the first link or the second link, e.g., as described in connection with1204inFIG.12and1312inFIG.13.

As shown, the apparatus1602may include a variety of components configured for various functions. In one configuration, the apparatus1602, and in particular the baseband unit1604, includes means for identifying a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The apparatus1602, and in particular the baseband unit1604, may further include means for executing the waveform switch associated with the first link or the second link

In one configuration, the waveform switch may be associated with the first link. In one configuration, the first indication of the waveform switch may be received from the base station. In one configuration, the first indication of the waveform switch may be received from the base station via an RRC message or a MAC-CE. In one configuration, the first indication of the waveform switch may be received from the base station via an FH-PDCCH. In one configuration, the first indication of the waveform switch may be generated at the node. In one configuration, the apparatus1602, and in particular the baseband unit1604, may further include means for transmitting, to the base station, a second indication of the waveform switch via an FH feedback message. In one configuration, the waveform switch may be associated with the second link. In one configuration, the first indication of the waveform switch may be generated at the node. In one configuration, the apparatus1602, and in particular the baseband unit1604, may further include means for transmitting, to the base station, a second indication of the waveform switch. The apparatus1602, and in particular the baseband unit1604, may further include means for transmitting, to the UE, a third indication of the waveform switch. In one configuration, the second indication of the waveform switch may be transmitted to the base station via an FH feedback message. In one configuration, the first indication of the waveform switch may be received from the UE. In one configuration, the apparatus1602, and in particular the baseband unit1604, may further include means for transmitting, to the base station, a second indication of the waveform switch. In one configuration, the second indication of the waveform switch may be transmitted to the base station via an FH feedback message. In one configuration, the apparatus1602, and in particular the baseband unit1604, may further include means for receiving, from the base station, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. In one configuration, the indication of the post-waveform switch resource mapping may be received from the base station via an FH-PDCCH.

The means may be one or more of the components of the apparatus1602configured to perform the functions recited by the means. As such, in one configuration, the means may be a TX Processor, an RX Processor, and a controller/processor configured to perform the functions recited by the means.

FIG.17is a diagram1700illustrating an example of a hardware implementation for an apparatus1702. The apparatus1702may be a base station, a component of a base station, or may implement base station functionality. In some aspects, the apparatus1702may include a baseband unit1704. The baseband unit1704may communicate through a cellular RF transceiver1722with the UE104. The baseband unit1704may include a computer-readable medium/memory. The baseband unit1704is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit1704, causes the baseband unit1704to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit1704when executing software. The baseband unit1704further includes a reception component1730, a communication manager1732, and a transmission component1734. The communication manager1732includes the one or more illustrated components. The components within the communication manager1732may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit1704. The baseband unit1704may be a component of the base station310and may include the memory376and/or at least one of the TX processor316, the RX processor370, and the controller/processor375.

The communication manager1732includes a waveform switching component1740that may be configured to identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE, e.g., as described in connection with1402inFIG.14and1502inFIG.15. The waveform switching component1740may be further configured to transmit, to the node, a second indication of the waveform switch, e.g., as described in connection with1504inFIG.15. The waveform switching component1740may be further configured to transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link, e.g., as described in connection with1404inFIG.14and1506inFIG.15. The waveform switching component1740may be further configured to execute the waveform switch associated with the first link, e.g., as described in connection with1508inFIG.15.

As shown, the apparatus1702may include a variety of components configured for various functions. In one configuration, the apparatus1702, and in particular the baseband unit1704, includes means for identifying a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE. The waveform switch corresponding to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The apparatus1702, and in particular the baseband unit1704, may further include means for transmitting, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

In one configuration, the waveform switch may be associated with the first link. In one configuration, the apparatus1702, and in particular the baseband unit1704, may further include means for executing the waveform switch associated with the first link. In one configuration, the first indication of the waveform switch may be generated at the base station. The apparatus1702, and in particular the baseband unit1704, may further include means for transmitting, to the node, a second indication of the waveform switch. In one configuration, the second indication of the waveform switch may be transmitted to the node via an RRC message or MAC-CE. In one configuration, the second indication of the waveform switch may be transmitted to the node via an FH-PDCCH. In one configuration, the first indication of the waveform switch may be received from the node via an FH feedback message. In one configuration, the waveform switch may be associated with the second link. In one configuration, the first indication of the waveform switch may be received from the node via an FH feedback message. In one configuration, the indication of the post-waveform switch resource mapping may be transmitted to the node via an FH-PDCCH.

The means may be one or more of the components of the apparatus1702configured to perform the functions recited by the means. As described supra, the apparatus1702may include the TX Processor316, the RX Processor370, and the controller/processor375. As such, in one configuration, the means may be the TX Processor316, the RX Processor370, and the controller/processor375configured to perform the functions recited by the means.

Referring back toFIGS.5A-15, a (repeater) node may identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE. The waveform switch may correspond to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform. The base station may transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link. The node may execute the waveform switch associated with the first link or the second link. Accordingly, the waveform in the first link or the second link may be switched in order to improve or maintain the link performance.

Aspect 1 is an apparatus for wireless communication at a node including at least one processor coupled to a memory and configured to identify a first indication of a waveform switch associated with a first link between a base station and the node or a second link between the node and a UE, the waveform switch corresponding to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform; and execute the waveform switch associated with the first link or the second link.

Aspect 2 is the apparatus of aspect 1, where the waveform switch is associated with the first link.

Aspect 3 is the apparatus of aspect 2, where the first indication of the waveform switch is received from the base station.

Aspect 4 is the apparatus of aspect 3, where the first indication of the waveform switch is received from the base station via an RRC message or a MAC-CE.

Aspect 5 is the apparatus of aspect 3, where the first indication of the waveform switch is received from the base station via an FH-PDCCH.

Aspect 6 is the apparatus of aspect 2, where the first indication of the waveform switch is generated at the node.

Aspect 7 is the apparatus of aspect 6, the at least one processor being further configured to: transmit, to the base station, a second indication of the waveform switch via an FH feedback message.

Aspect 8 is the apparatus of aspect 1, where the waveform switch is associated with the second link.

Aspect 9 is the apparatus of aspect 8, where the first indication of the waveform switch is generated at the node.

Aspect 10 is the apparatus of aspect 9, the at least one processor being further configured to: transmit, to the base station, a second indication of the waveform switch; and transmit, to the UE, a third indication of the waveform switch.

Aspect 11 is the apparatus of aspect 10, where the second indication of the waveform switch is transmitted to the base station via an FH feedback message.

Aspect 12 is the apparatus of aspect 8, where the first indication of the waveform switch is received from the UE.

Aspect 13 is the apparatus of aspect 12, the at least one processor being further configured to: transmit, to the base station, a second indication of the waveform switch.

Aspect 14 is the apparatus of aspect 13, where the second indication of the waveform switch is transmitted to the base station via an FH feedback message.

Aspect 15 is the apparatus of any of aspects 1 to 14, the at least one processor being further configured to: receive, from the base station, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

Aspect 16 is the apparatus of aspect 15, where the indication of the post-waveform switch resource mapping is received from the base station via an FH-PDCCH.

Aspect 17 is the apparatus of any of aspects 1 to 16, further including a transceiver coupled to the at least one processor, where the node is a repeater or a repeating device.

Aspect 18 is an apparatus for wireless communication at a base station including at least one processor coupled to a memory and configured to identify a first indication of a waveform switch associated with a first link between the base station and a node or a second link between the node and a UE, the waveform switch corresponding to a first switch from an OFDM waveform to an SC waveform or a second switch from the SC waveform to the OFDM waveform; and transmit, to the node, an indication of a post-waveform switch resource mapping between a first waveform associated with the first link and a second waveform associated with the second link.

Aspect 19 is the apparatus of aspect 18, where the waveform switch is associated with the first link.

Aspect 20 is the apparatus of aspect 19, the at least one processor being further configured to: execute the waveform switch associated with the first link.

Aspect 21 is the apparatus of any of aspects 19 and 20, where the first indication of the waveform switch is generated at the base station, and the at least one processor is further configured to: transmit, to the node, a second indication of the waveform switch.

Aspect 22 is the apparatus of aspect 21, where the second indication of the waveform switch is transmitted to the node via an RRC message or MAC-CE.

Aspect 23 is the apparatus of aspect 21, where the second indication of the waveform switch is transmitted to the node via an FH-PDCCH.

Aspect 24 is the apparatus of any of aspects 19 and 20, where the first indication of the waveform switch is received from the node via an FH feedback message.

Aspect 25 is the apparatus of aspect 18, where the waveform switch is associated with the second link.

Aspect 26 is the apparatus of aspect 25, where the first indication of the waveform switch is received from the node via an FH feedback message.

Aspect 27 is the apparatus of any of aspects 18 to 26, where the indication of the post-waveform switch resource mapping is transmitted to the node via an FH-PDCCH.

Aspect 28 is the apparatus of any of aspects 18 to 27, further including a transceiver coupled to the at least one processor, where the node is a repeater or a repeating device.

Aspect 29 is a method of wireless communication for implementing any of aspects 1 to 28.

Aspect 30 is an apparatus for wireless communication including means for implementing any of aspects 1 to 28.

Aspect 31 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement any of aspects 1 to 28.