Beamformed paging transmission
One or more techniques for beamformed paging are disclosed. A transmission/reception point (TRP) may transmit a paging inquiry signal using beam sweeping in a paging inquiry (PI) block with a different time, frequency resource set and/or sequence configuration associated with the same paging occasion (PO), for example, to randomize and/or distribute WTRUs into different monitoring groups. A WTRU may transmit an uplink paging inquiry response indicating a downlink beam for a paging data transmission and/or a WTRU ID. A downlink control and/or a data channel transmission may be triggered by a paging inquiry response transmission. Paging downlink control information may be transmitted in a WTRU-specific control channel, which may contain CRC bits masked by a temporary paging identity, e.g., based on a WTRU ID that may be reported in a paging inquiry response transmission. A WTRU paging procedure may be based on a paging inquiry signal and/or response transmission.
1. A wireless transmit/receive unit (WTRU) in communication with a wireless communication network, the WTRU comprising:
a memory;
a processor, the processor configured at least to:
select at least one beamformed synchronization signal block (SSB) associated with an occurrence of a paging occasion (PO);
determine a Paging Inquiry (PI) signal configuration based on the at least one SSB and a WTRU identifier (ID);
monitor for a PI signal during a portion of the PO, wherein timing information to monitor for the PI signal during the portion of the PO is determined based on the PI signal configuration;
detect the PI signal; and
send a PI response using a first beam if the PI signal is detected, the PI response including an indication that a second beam is to be used for a paging transmission, an indication of a preamble, and an indication of the WTRU ID; and
a receiver, the receiver configured at least to:
receive a paging transmission using the second beam.
2. The WTRU of claim 1 , wherein the processor is further configured to determine one or more transmission resources based on the PI signal, the one or more transmission resources being used for transmission of the first beam.
3. The WTRU of claim 1 , wherein the processor is further configured to determine one or more of: a frequency resource allocation for the PI signal from the PI signal configuration, a sequence index for the PI signal from the PI signal configuration, or a time for the PI signal from a time offset and the portion of the PO.
4. The WTRU of claim 1 , wherein the processor is further configured to determine that the paging transmission is only received by the second beam.
5. The WTRU of claim 1 , wherein the processor is further configured such that the PI response is sent upon a determination that the PI signal indicates that the paging transmission is to be directed to the WTRU.
6. The WTRU of claim 1 , wherein the at least one beamformed SSB is received from a node of the wireless communication network.
7. The WTRU of claim 1 , wherein the PI signal configuration comprises one or more of the WTRU ID, a discontinuous reception (DRX) cycle duration, a WTRU service type, a sub-frame number, a sub-frame index, or a PO location.
8. The WTRU of claim 1 , wherein the portion is a first portion, and wherein the PI signal is received in the first portion of the PO and the paging transmission is received in a second portion of the PO.
9. The WTRU of claim 1 , wherein the processor is further configured to determine that the PI signal indicates that the paging transmission is to be directed to the WTRU based on one or more elements of a sequence configuration of the PI signal.
10. The WTRU of claim 9 , wherein the one or more elements of the sequence configuration of the PI signal includes one or more of: the WTRU ID, a discontinuous reception (DRX) cycle, or a PO index.
11. The WTRU of claim 1 , wherein the first beam is an uplink (UL) resource and the second beam is a downlink (DL) resource.
12. The WTRU of claim 1 , wherein the PI signal indicates that the paging transmission is to be directed to the WTRU.
13. The WTRU of claim 1 , wherein the PO is common to a plurality of wireless transmit/receive units (WTRUs).
14. A wireless transmit/receive unit (WTRU) in communication with a wireless communication network, the WTRU comprising:
a memory, and;
a processor, the processor configured at least to:
select at least one beamformed synchronization signal block (SSB) associated with an occurrence of a paging occasion (PO);
determine a Paging Inquiry (PI) signal configuration based on the at least one SSB and a WTRU identifier (ID);
determine a portion of the PO based on the PI signal configuration;
monitor for a PI signal during the portion of the PO;
send a PI response using a first beam if the PI signal indicates a paging transmission is to be directed to the WTRU, the PI response including an indication that a second beam is to be used for the paging transmission an indication of a preamble, and an indication of the WTRU ID; and
receive the paging transmission via the second beam.
15. The WTRU of claim 14 , wherein the processor is further configured to determine one or more transmission resources based on the PI signal, the one or more transmission resources being used for transmission of the first beam.
16. The WTRU of claim 14 , wherein the processor is further configured to determine one or more of a frequency resource allocation for the PI signal from the PI signal configuration, a sequence index for the PI signal from the PI signal configuration, or a time for the PI signal from a time offset and the portion of the PO.
17. A method implemented in a wireless transmit/receive unit (WTRU) for communicating with a wireless communication network, the method comprising:
selecting at least one beamformed synchronization signal block (SSB) associated with an occurrence of a paging occasion (PO);
determining a Paging Inquiry (PI) signal configuration based on the at least one SSB and a WTRU identifier (ID);
monitoring for a PI signal during a portion of the PO, wherein timing information to monitor for the PI signal during the portion of the PO is determined based on the PI signal configuration;
detecting the PI signal;
sending a PI response using a first beam if the PI signal is detected, the PI response including an indication that a second beam is to be used for a paging transmission, an indication of a preamble, and an indication of the WTRU ID; and
receiving a paging transmission using the second beam.