Methods and systems for scheduling in Uu-based vehicle-to-vehicle communication
A method for operation in a WTRU may comprise transmitting, from the WTRU to an eNB, a request for SPS resources including a periodicity of the requested SPS resources and a time offset indicative of a time in which the WTRU expects have an SPS resource allocated. The method may further comprise receiving, by the WTRU from the eNB, in response to the transmitted request for SPS resources, an SPS configuration. The time offset of the transmitted request may include a subframe number (SFN) offset with respect to SFN 0 of the WTRU. The received SPS configuration may correspond to a PC5 interface and the SPS configuration may be received over a physical downlink control channel (PDCCH).
1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
transmitting a message, from the WTRU to a base station, wherein the message indicates a traffic periodicity, a transport block size and a timing offset with respect to subframe number 0 of system frame number 0;
receiving, by the WTRU from the base station, in response to the transmitted message, an index identifying a sidelink semi-persistent scheduling (SPS) configuration and an indication of one or more parameters associated with the sidelink SPS configuration; and
transmitting data on a sidelink channel, by the WTRU to another WTRU, in accordance with the sidelink SPS configuration;
wherein the sidelink SPS configuration is a sidelink SPS configuration of a plurality of sidelink SPS configurations associated with the WTRU.
2. The method according to claim 1 , wherein the sidelink SPS configuration corresponds to a PC5 interface.
3. The method according to claim 1 , further comprising:
receiving an indication of the sidelink SPS configuration over a physical downlink control channel (PDCCH).
4. The method according to claim 1 , further comprising:
transmitting the data, in accordance with a logical channel priority (LCP).
5. The method according to claim 1 , wherein the message includes a ProSe Per-Packet Priority (PPPP) information element.
6. The method according to claim 1 , further comprising:
receiving, by the WTRU from the base station, a deactivation message indicating deactivation of the sidelink SPS configuration.
7. A wireless transmit/receive unit (WTRU), the comprising:
a transmitter configured to transmit a message, from the WTRU to a base station, wherein the message indicates a traffic periodicity and a timing offset with respect to subframe number 0 of system frame number 0;
a receiver configured to receive, by the WTRU from the base station, in response to the transmitted message, an index identifying a sidelink semi-persistent scheduling (SPS) configuration and an indication of one or more parameters associated with the sidelink SPS configuration; and
the transmitter further configured to transmit data, from the WTRU to another WTRU, on a sidelink channel in accordance with the sidelink SPS configuration;
wherein the sidelink SPS configuration is a sidelink SPS configuration of a plurality of sidelink SPS configurations associated with the WTRU.
8. The WTRU according to claim 7 , wherein the sidelink SPS configuration corresponds to a PC5 interface.
9. The WTRU according to claim 7 , further comprising:
the receiver further configured to receive an activation message indicating the sidelink SPS configuration, wherein the activation message is received over a physical downlink control channel (PDCCH).
10. The WTRU according to claim 7 , further comprising:
the transmitter further configured to transmit the data, in accordance with a logical channel priority (LCP).
11. The WTRU according to claim 7 , wherein the message includes a ProSe Per-Packet Priority (PPPP) information element.
12. The WTRU according to claim 7 , further comprising:
the receiver further configured to receive, by the WTRU from the base station, a deactivation message indicating deactivation of the sidelink SPS configuration.
13. A method performed by a base station, the method comprising:
receiving, from a WTRU, a message indicating a traffic periodicity, a transport block size and a timing offset with respect to subframe number 0 of system frame number 0; and
transmitting, to the WTRU, in response to the message, an index identifying a sidelink semi-persistent scheduling (SPS) configuration and an indication of one or more parameters associated with the sidelink SPS configuration;
wherein the sidelink SPS configuration is a sidelink SPS configuration of a plurality of sidelink SPS configurations associated with the WTRU.
14. The method according to claim 13 , wherein the sidelink SPS configuration corresponds to a PC5 interface.
15. The method according to claim 13 , wherein an indication of the sidelink SPS configuration is transmitted over a physical downlink control channel (PDCCH).
16. The method according to claim 13 , wherein the message includes a ProSe Per-Packet Priority (PPPP) information element.
17. The method according to claim 13 , further comprising:
transmitting, by the base station to the WTRU, a deactivation message indicating deactivation of the sidelink SPS configuration.