Handling user plane in wireless systems
Systems, methods and instrumentalities may be provided for handling a user plane in a wireless communication system. The wireless communication system may be characterized by a flexible air interface. One aspect of the flexible air interface is that transmissions by a wireless transmit/receive unit (WTRU) in the system may have different quality of service (QoS) requirements, such as different latency requirements. The WTRU may adjust its behaviors based on the QoS requirements, e.g., by utilizing preconfigured resources, resource requests, self-scheduling, and/or the like, such that the transmissions may be performed in accordance with their respective QoS requirements.
1. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
receive information indicating an uplink transmission grant for the WTRU and a priority associated with the uplink transmission grant;
determine that data associated with a first logical channel is available for transmission;
determine that the priority associated with the uplink transmission grant matches a priority associated with the first logical channel;
determine, based on the priority associated with the uplink transmission grant matching priority associated with the first logical channel, the data associated with the first logical channel is to be transmitted using the uplink transmission grant; and
transmit the data associated with the first logical channel using the uplink transmission grant.
2. The WTRU of claim 1 , wherein the processor is further configured to receive configuration information that indicates the priority associated with the first logical channel.
3. The WTRU of claim 1 , wherein the determination that the data associated with the first logical channel is to be transmitted using the uplink transmission grant is based further on a determination that a subcarrier spacing associated with the uplink transmission grant is among one or more subcarrier spacings associated with the first logical channel.
4. The WTRU of claim 1 , wherein the determination that the data associated with the first logical channel is to be transmitted using the uplink transmission grant is based further on a transmission timing parameter associated with the uplink transmission grant.
5. The WTRU of claim 1 , wherein the processor is further configured to determine that data associated with a second logical channel is available for transmission and determine, based on at least the priority associated with the uplink transmission grant and a priority associated with the second logical channel, that the data associated with the second logical channel is not to be transmitted using the uplink transmission grant.
6. The WTRU of claim 5 , wherein the processor is further configured to transmit a scheduling request (SR) to a base station in response to determining that the data associated with the second logical channel is not to be transmitted using the uplink transmission grant.
7. The WTRU of claim 6 , wherein the SR is transmitted to the base station using one or more SR resources configured for the second logical channel.
8. The WTRU of claim 7 , wherein the processor is further configured to receive configuration information that indicates the one or more SR resources configured for the second logical channel.
9. The WTRU of claim 1 , wherein the information that indicates the uplink transmission grant and the priority associated with the uplink transmission grant is received via a downlink control channel.
10. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
receiving information indicating an uplink transmission grant for the WTRU and a priority associated with the uplink transmission grant;
determining that data associated with a first logical channel is available for transmission;
determining that the priority associated with the uplink transmission grant matches a priority associated with the first logical channel;
determining, based on the priority associated with the uplink transmission grant matching priority associated with the first logical channel, the data associated with the first logical channel is to be transmitted using the uplink transmission grant; and
transmitting the data associated with the first logical channel using the uplink transmission grant.
11. The method of claim 10 , further comprising receiving configuration information that indicates the priority associated with the first logical channel.
12. The method of claim 10 , wherein the determination that the data associated with the first logical channel is to be transmitted using the uplink transmission grant is based further on a determination that a subcarrier spacing associated with the uplink transmission grant is among one or more subcarrier spacings associated with the first logical channel.
13. The method of claim 10 , wherein the determination that the data associated with the first logical channel is to be transmitted using the uplink transmission grant is based further on a transmission timing parameter associated with the uplink transmission grant.
14. The method of claim 10 , further comprising determining that data associated with a second logical channel is available for transmission and determining, based on at least the priority associated with the uplink transmission grant and a priority associated with the second logical channel, that the data associated with the second logical channel is not to be transmitted using the uplink transmission grant.
15. The method of claim 14 , further comprising transmitting a scheduling request (SR) to a base station in response to determining that the data associated with the second logical channel is not to be transmitted using the uplink transmission grant.
16. The method of claim 15 , wherein the SR is transmitted to the base station using one or more SR resources configured for the second logical channel.
17. The method of claim 16 , further comprising receiving configuration information that indicates the one or more SR resources configured for the second logical channel.
18. The method of claim 10 , wherein the information that indicates the uplink transmission grant and the priority associated with the uplink transmission grant is received via a downlink control channel.