US-12628186-B2 - Multicast scheduling in a full duplex network

US12628186B2US 12628186 B2US12628186 B2US 12628186B2US-12628186-B2

Abstract

Methods, systems, and devices for wireless communications are described. Techniques described herein relate to transmission of a multicast message via a common frequency resource (CFR) in a full duplex slot. The CFR may be positioned within the downlink bandwidth parts (BWP)s configured for a group of user equipments (UE)s such that each UE in the group may monitor for and receive the multicast message. The network may indicate the frequency position of the CFR to the group of UEs. The frequency resources (e.g., the resource blocks) configured for downlink for a UE may be different between half duplex slots and full duplex slots. The network and the UE may determine the active CFR for a full duplex slot based on the resources configured for the full duplex slot. The UE may monitor for and receive a multicast transmission in the active CFR in the full duplex slot.

Inventors

Ahmed Attia ABOTABL
Muhammad Sayed Khairy Abdelghaffar
Le Liu
Alberto RICO ALVARINO

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260512
Application Date: 20220920

Claims (20)

1 . A method for wireless communications at a user equipment (UE), comprising: receiving, from a network entity, control signaling including an indication of a common frequency resource configuration, an indication of an uplink bandwidth part for a full duplex slot type comprising one or more uplink subbands, an indication of a downlink bandwidth part for the full duplex slot type comprising one or more downlink subbands, or a combination thereof; receiving an indication of a second downlink bandwidth part for a half duplex slot type, wherein the common frequency resource configuration includes an indication of a first common frequency resource associated with the full duplex slot type and a second common frequency resource associated with the half duplex slot type; determining the first common frequency resource based on the slot being the full duplex slot type; determining an active common frequency resource for a slot of the full duplex slot type based at least in part on the common frequency resource configuration and one or more of the uplink bandwidth part, the downlink bandwidth part, the one or more uplink subbands, or the one or more downlink subbands, the slot of the full duplex slot type comprising the uplink bandwidth part and the downlink bandwidth part; and receiving, from the network entity, a multicast transmission in the slot of the full duplex slot type via the determined active common frequency resource.
2 . The method of claim 1 , wherein receiving the control signaling comprises: receiving an indication of a first set of resource blocks associated with the common frequency resource configuration and an indication of a second set of resource blocks associated with the downlink bandwidth part, and wherein determining the active common frequency resource comprises determining an overlapping set of resource blocks between the first set of resource blocks and the second set of resource blocks.
3 . The method of claim 1 , further comprising: receiving second control signaling scheduling the slot with the full duplex slot type, wherein the common frequency resource configuration indicates respective common frequency resources associated with a set of downlink bandwidth parts, the set of downlink bandwidth parts including the downlink bandwidth part, and wherein determining the active common frequency resource comprises determining the respective common frequency resource associated with the downlink bandwidth part.
4 . The method of claim 3 , wherein: at least one downlink bandwidth part of the set of downlink bandwidth parts includes two non-contiguous subbands, and the common frequency resource configuration further indicates respective common frequency resources associated with the two non-contiguous subbands.
5 . The method of claim 1 , wherein receiving the control signaling comprises: receiving an indication of a set of communication resources that are unavailable for the active common frequency resource.
6 . The method of claim 1 , wherein determining the active common frequency resource comprises: determining, based on a subset of frequency resources of the downlink bandwidth part overlapping with uplink resources, that the active common frequency resource does not include the subset of frequency resources.
7 . The method of claim 1 , further comprising: receiving, from the network entity, a second multicast transmission in a second slot of the half duplex slot type via the second common frequency resource.
8 . The method of claim 1 , wherein the multicast transmission comprises one of a group-common downlink control channel message or a group-common downlink shared channel message.
9 . The method of claim 1 , wherein receiving the control signaling comprises: receiving an indication of a set of resource blocks associated with the downlink bandwidth part, wherein the active common frequency resource comprises a subset of contiguous resource blocks of the set of resource blocks.
10 . A method for wireless communications at a network entity, comprising: outputting control signaling including an indication of a common frequency resource configuration, an indication of an uplink bandwidth part for a full duplex slot type comprising one or more uplink subbands, and an indication of a downlink bandwidth part for the full duplex slot type comprising one or more downlink subbands, or a combination thereof; outputting an indication of a second downlink bandwidth part for a half duplex slot type, wherein the common frequency resource configuration includes an indication of a first common frequency resource associated with the full duplex slot type and a second common frequency resource associated with the half duplex slot type; determining the first common frequency resource based on the slot being the full duplex slot type; determining an active common frequency resource for a slot of the full duplex slot type based at least in part on the common frequency resource configuration and one or more the uplink bandwidth part, the downlink bandwidth part, the one or more uplink subbands, or the one or more downlink subbands, the slot of the full duplex slot type comprising the uplink bandwidth part and the downlink bandwidth part; and outputting a multicast message to a group of user equipments (UE)s in the slot of the full duplex slot type via the determined active common frequency resource.
11 . The method of claim 10 , wherein outputting the control signaling comprises: outputting an indication of a first set of resource blocks associated with the common frequency resource configuration and an indication of a second set of resource blocks associated with the downlink bandwidth part, and wherein determining the active common frequency resource comprises determining an overlapping set of resource blocks between the first set of resource blocks and the second set of resource blocks.
12 . The method of claim 10 , further comprising: outputting second control signaling scheduling the slot with the full duplex slot type, wherein the common frequency resource configuration indicates respective common frequency resources associated with a set of downlink bandwidth parts, the set of downlink bandwidth parts including the downlink bandwidth part, and wherein determining the active common frequency resource comprises determining the respective common frequency resource associated with the downlink bandwidth part.
13 . The method of claim 12 , wherein: at least one downlink bandwidth part of the set of downlink bandwidth parts includes two non-contiguous subbands, and the common frequency resource configuration further indicates respective common frequency resources associated with the two non-contiguous subbands.
14 . The method of claim 10 , wherein outputting the control signaling comprises: outputting an indication of a set of communication resources that are unavailable for the active common frequency resource.
15 . The method of claim 10 , wherein determining the active common frequency resource comprises: determining, based on a subset of frequency resources of the downlink bandwidth part overlapping with uplink resources, that the active common frequency resource does not include the subset of frequency resources.
16 . The method of claim 10 , further comprising: outputting a second multicast transmission to the group of UEs in a second slot of the half duplex slot type via the second common frequency resource.
17 . The method of claim 16 , wherein the second multicast transmission comprises one of a group-common downlink control channel message or a group-common downlink shared channel message.
18 . The method of claim 10 , wherein outputting the control signaling comprises: outputting an indication of a set of resource blocks associated with the downlink bandwidth part, wherein the active common frequency resource comprises a subset of contiguous resource blocks of the set of resource blocks.
19 . An apparatus for wireless communications at a user equipment (UE), comprising: one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to: receive, from a network entity, control signaling including an indication of a common frequency resource configuration, an indication of an uplink bandwidth part for a full duplex slot type comprising one or more uplink subbands, an indication of a downlink bandwidth part for the full duplex slot type comprising one or more downlink subbands, or a combination thereof; receive an indication of a second downlink bandwidth part for a half duplex slot type, wherein the common frequency resource configuration includes an indication of a first common frequency resource associated with the full duplex slot type and a second common frequency resource associated with the half duplex slot type; determine the first common frequency resource based on the slot being the full duplex slot type; determine an active common frequency resource for a slot of the full duplex slot type based at least in part on the common frequency resource configuration and one or more of the uplink bandwidth part, the downlink bandwidth part, the one or more uplink subbands, or the one or more downlink subbands, the slot of the full duplex slot type comprising the uplink bandwidth part and the downlink bandwidth part; and receive, from the network entity, a multicast transmission in the slot of the full duplex slot type via the determined active common frequency resource.
20 . The apparatus of claim 19 , wherein the instructions to receive the control signaling are executable by the one or more processors to cause the apparatus to: receive an indication of a first set of resource blocks associated with the common frequency resource configuration and an indication of a second set of resource blocks associated with the downlink bandwidth part, and wherein determining the active common frequency resource comprises determining an overlapping set of resource blocks between the first set of resource blocks and the second set of resource blocks.

Description

FIELD OF TECHNOLOGY The following relates to wireless communications, including multicast scheduling in a full duplex network. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support multicast scheduling in a full duplex network. For example, the described techniques provide for transmission and reception of a multicast message via a common frequency resource (CFR) in a full duplex slot. For example, multicast messages may include group-common physical downlink control channel (PDCCH) messages or group-common physical downlink shared channel (PDSCH) messages. The CFR may be positioned within the downlink bandwidth parts (BWP)s configured for the group of user equipments (UE)s such that each UE in the group may monitor for and receive the multicast message. The network may indicate the frequency position of the CFR to the group of UEs, for example, via radio resource control (RRC) signaling. The frequency resources (e.g., the resource blocks (RB)s) configured for downlink for a UE may be different between half duplex slots and full duplex slots. Accordingly, the network and the UE may determine the active CFR for a full duplex slot based on the resources configured for the full duplex slot. The UE may monitor for and receive a multicast transmission in the active CFR in the full duplex slot. A method for wireless communications at a UE is described. The method may include receiving, from a network entity, control signaling including an indication of a CFR configuration, an indication of an uplink BWP for a full duplex slot type including one or more uplink subbands, an indication of a downlink BWP for the full duplex slot type including one or more downlink subbands, or a combination thereof, determining an active CFR for a slot of the full duplex slot type based on the CFR configuration, the uplink BWP, the downlink BWP, the one or more uplink subbands, the one or more downlink subbands, or a combination thereof, and receiving, from the network entity, a multicast transmission in the slot via the determined active CFR. An apparatus for wireless communications at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive, from a network entity, control signaling including an indication of a CFR configuration, an indication of an uplink BWP for a full duplex slot type including one or more uplink subbands, an indication of a downlink BWP for the full duplex slot type including one or more downlink subbands, or a combination thereof, determine an active CFR for a slot of the full duplex slot type based on the CFR configuration, the uplink BWP, the downlink BWP, the one or more uplink subbands, the one or more downlink subbands, or a combination thereof, and receive, from the network entity, a multicast transmission in the slot via the determined active CFR. Another apparatus for wireless communications at a UE is described. The apparatus may include means for receiving, from a network entity, control signaling including an indication of a CFR configuration, an indication of an uplink BWP for a full duplex slot type including one or more uplink subbands, an indication of a downlink BWP for the full duplex slot type including one or more downlink subbands, or a combination thereof, means for determining an active CFR for a slot of the full duplex slot type based on the CFR configuration, the uplink BWP, the downlink BWP, the one or more uplink subbands, the one or more downlink subbands, or a combination thereof, and means for receiving, from the network entity, a multicast transmission in the slot via the determined active CFR. A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may inc