RESOURCE SCHEDULING IN MULTIPLE PATHS
Various aspects of the present disclosure relate to methods, apparatuses, and systems that support resource scheduling in multiple paths. For instance, implementations provide ways for enabling a user equipment (UE) to obtain sidelink resources and for connection reestablishment in multipath scenarios. In implementations, a UE uses sidelink resources provided by a primary path to a first cell where the UE establishes a radio resource control (RRC) connection until a second link and/or secondary path addition. In scenarios where the primary path is changed to the second path, the UE can start using the sidelink resources provided by a serving cell on the second path.
1 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and operable to cause the UE to:
establish connectivity with a first radio cell using an indirect path and via a UE-to-network relay, and connectivity with a second radio cell using a direct path;
transmit, to the second radio cell, information pertaining to sidelink transmission to the first radio cell, the information comprising sidelink UE information and a sidelink buffer status;
receive, from the second radio cell, a first sidelink transmission grant; and
transmit, using the first sidelink transmission grant, sidelink data to the UE-to-network relay.
2 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to:
establish the connectivity with the first radio cell before the connectivity with the second radio cell; and
establish the connectivity with the second radio cell before the connectivity with the first radio cell.
3 . The UE of claim 1 , wherein to establish connectivity with the first radio cell, the at least one processor is operable to cause the UE to establish a radio resource control (RRC) connection with the first radio cell using the UE-to-network relay.
4 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to transmit to the UE-to-network relay using Mode 2 sidelink resources provided by the first radio cell.
5 . The UE of claim 1 , wherein the UE-to-network relay comprises a first sidelink destination, and wherein the at least one processor is operable to cause the UE to transmit to a second sidelink destination using Mode 2 resources provided by the first radio cell.
6 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to:
receive radio resource control (RRC) reconfiguration from the first radio cell configuring radio measurements for the UE; and
transmit, to the first radio cell, radio measurements based at least in part on the RRC reconfiguration.
7 . The UE of claim 1 , wherein to establish the connectivity with the second radio cell, the at least one processor is operable to cause the UE to receive radio resource control (RRC) reconfiguration from the first radio cell for establishing the connectivity with the second radio cell.
8 . The UE of claim 1 , wherein the first sidelink transmission grant from the second radio cell comprises a Mode 1 sidelink transmission grant.
9 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to:
receive sidelink resources via one or more of system information or dedicated radio resource control (RRC) signaling; and
transmit to the UE-to-network relay using the sidelink resources.
10 . The UE of claim 1 , wherein the sidelink buffer status comprises a data volume of one or more logical channels of the UE-to-network relay.
11 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to transmit data of at least one Uu application via the UE-to-network relay for receipt by the first radio cell.
12 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to determine that sidelink resources associated with the first radio cell and the second radio cell are concurrently usable for sidelink transmission.
13 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to:
receive, from the first radio cell, a second sidelink transmission grant;
transmit a first data type using the first sidelink transmission grant; and
transmit a second data type using the second sidelink transmission grant.
14 . The UE of claim 1 , wherein the at least one processor is operable to cause the UE to:
receive, from one or more of the UE-to-network relay or the second radio cell, reestablishment information indicating which of the first radio cell or the second radio cell is to be used for a connection reestablishment procedure; and
implement, based at least in part on a reestablishment event, the connection reestablishment procedure based at least in part on the reestablishment information.
15 . (Canceled)
16 . (canceled)
17 . (canceled)
18 . (canceled)
19 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and operable to cause the UE to:
establish connectivity with a first radio cell using an indirect path and via a UE-to-network relay, and connectivity with a second radio cell using a direct path;
receive, from one or more of the UE-to-network relay or the second radio cell, reestablishment information indicating which of the first radio cell or the second radio cell is to be used for a connection reestablishment procedure; and
implement, based at least in part on a reestablishment event, the connection reestablishment procedure based at least in part on the reestablishment information.
20 . A method, comprising:
establishing connectivity with a first radio cell using an indirect path and via a user equipment (UE)-to-network relay, and connectivity with a second radio cell using a direct path;
transmitting, to the second radio cell, information pertaining to sidelink transmission to the first radio cell, the information comprising sidelink UE information and a sidelink buffer status;
receiving, from the second radio cell, a first sidelink transmission grant; and
transmitting, using the first sidelink transmission grant, sidelink data to the UE-to-network relay.
21 . The method of claim 20 , further comprising:
establishing the connectivity with the first radio cell before the connectivity with the second radio cell; and
establishing the connectivity with the second radio cell before the connectivity with the first radio cell.
22 . The method of claim 20 , wherein establishing connectivity with the first radio cell comprises establishing a radio resource control (RRC) connection with the first radio cell using the UE-to-network relay.
23 . The method of claim 20 , further comprising transmitting to the UE-to-network relay using Mode 2 sidelink resources provided by the first radio cell.
24 . A method, comprising:
establishing connectivity with a first radio cell using an indirect path and via a user equipment (UE)-to-network relay, and connectivity with a second radio cell using a direct path;
receiving from one or more of the UE-to-network relay or the second radio cell, reestablishment information indicating which of the first radio cell or the second radio cell is to be used for a connection reestablishment procedure; and
implementing, based at least in part on a reestablishment event, the connection reestablishment procedure based at least in part on the reestablishment information.