METHODS AND APPARATUS FOR TRIGGERING A SCHEDULING REQUEST IN NON-TERRESTRIAL NETWORKS
A method performed by a user equipment (UE) is provided. In the method, a timing advance (TA) report configuration is received. Whether a TA report(s) (TAR) has been triggered and not cancelled is determined. In a case of determining that the TAR(s) has been triggered and not cancelled, whether an uplink resource(s) is available for a new transmission and the uplink resource(s) accommodates a TAR Media Access Control (MAC) Control Element (CE) and a subheader of the TAR MAC CE as a result of logical channel prioritization (LCP) is determined. In a case of determining that no uplink resource is available for the new transmission, or the uplink resource(s) available for the new transmission does not accommodate the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, whether to trigger a scheduling request is determined based on the TA report configuration.
1 . A method performed by a User Equipment (UE), the method comprising:
receiving a timing advance (TA) report configuration;
determining whether at least one TA report (TAR) has been triggered and not cancelled;
in a case of determining that the at least one TAR has been triggered and not cancelled, determining whether at least one uplink resource is available for a new transmission and the at least one uplink resource accommodates a TAR Media Access Control (MAC) Control Element (CE) and a subheader of the TAR MAC CE as a result of logical channel prioritization (LCP); and
in a case of determining that no uplink resource is available for the new transmission, or the at least one uplink resource available for the new transmission does not accommodate the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, determining whether to trigger a scheduling request (SR) based on the TA report configuration.
2 . The method of claim 1 , wherein the TA report configuration comprises a parameter indicating whether to trigger the SR for a TA reporting procedure.
3 . The method of claim 2 , wherein determining whether to trigger the SR based on the TA report configuration comprises:
determining whether the parameter is configured with a value of enabled.
4 . The method of claim 3 , further comprising:
in a case of determining that the parameter is configured with the value of enabled, triggering the SR.
5 . The method of claim 1 , further comprising:
in a case of determining that the at least one uplink resource is available for the new transmission and the at least one uplink resource accommodates the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, instructing a multiplexing and assembly procedure to generate the TAR MAC CE.
6 . The method of claim 1 , wherein the TAR MAC CE is associated with one of the at least one TAR that has been triggered and not cancelled.
7 . The method of claim 1 , wherein the UE operates in a non-terrestrial network (NTN).
8 . A User Equipment (UE), comprising:
one or more non-transitory computer-readable media storing computer-executable instructions; and
at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to cause the UE to:
receive a timing advance (TA) report configuration;
determine whether at least one TA report (TAR) has been triggered and not cancelled;
in a case of determining that the at least one TAR has been triggered and not cancelled, determine whether at least one uplink resource is available for a new transmission and the at least one uplink resource accommodates a TAR Media Access Control (MAC) Control Element (CE) and a subheader of the TAR MAC CE as a result of logical channel prioritization (LCP); and
in a case of determining that no uplink resource is available for the new transmission, or the at least one uplink resource available for the new transmission does not accommodate the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, determine whether to trigger a scheduling request (SR) based on the TA report configuration.
9 . The UE of claim 8 , wherein the TA report configuration comprises a parameter indicating whether to trigger the SR for a TA reporting procedure.
10 . The UE of claim 9 , wherein determining whether to trigger the SR based on the TA report configuration comprises:
determining whether the parameter is configured with a value of enabled.
11 . The UE of claim 10 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:
in a case of determining that the parameter is configured with the value of enabled, trigger the SR.
12 . The UE of claim 8 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to
in a case of determining that the at least one uplink resource is available for the new transmission and the at least one uplink resource accommodates the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, instruct a multiplexing and assembly procedure to generate the TAR MAC CE.
13 . The UE of claim 8 , wherein the TAR MAC CE is associated with one of the at least one TAR that has been triggered and not cancelled.
14 . The UE of claim 8 , wherein the UE operates in a non-terrestrial network (NTN).
15 . A Base Station (BS), comprising:
one or more non-transitory computer-readable media storing computer-executable instructions; and
at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to cause the BS to:
transmit a timing advance (TA) report configuration to a User Equipment (UE), wherein the TA report configuration causes the UE to:
determine whether at least one TA report (TAR) has been triggered and not cancelled;
in a case of determining that the at least one TAR has been triggered and not cancelled, determine whether at least one uplink resource is available for a new transmission and the at least one uplink resource accommodates a TAR Media Access Control (MAC) Control Element (CE) and a subheader of the TAR MAC CE as a result of logical channel prioritization (LCP); and
in a case of determining that no uplink resource is available for the new transmission, or the at least one uplink resource available for the new transmission does not accommodate the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, determine whether to trigger a scheduling request (SR) based on the TA report configuration.
16 . The BS of claim 15 , wherein the TA report configuration comprises a parameter indicating whether to trigger the SR for a TA reporting procedure.
17 . The BS of claim 16 , wherein determining whether to trigger the SR based on the TA report configuration comprises:
determining whether the parameter is configured with a value of enabled.
18 . The BS of claim 17 , wherein the TA report configuration further causes the UE to:
in a case of determining that the parameter is configured with the value of enabled, trigger the SR.
19 . The BS of claim 15 , wherein the TA report configuration further causes the UE to:
In a case of determining that the at least one uplink resource is available for the new transmission and the at least one uplink resource accommodates the TAR MAC CE and the subheader of the TAR MAC CE as a result of LCP, instruct a multiplexing and assembly procedure to generate the TAR MAC CE.
20 . The BS of claim 15 , wherein the TAR MAC CE is associated with one of the at least one TAR that has been triggered and not cancelled.
21 . The BS of claim 15 , wherein the UE operates in a non-terrestrial network (NTN).