L2 procedures for unicast and/or multicast link establishment and maintenance

Patent metadata

Field	Value
Publication number	US-2021410129-A1
Application number	US-201917279272-A
Country	US
Kind code	A1
Filing date	Sep 25, 2019
Priority date	Sep 25, 2018
Publication date	Dec 30, 2021
Grant date	—

Abstract

Systems, methods, and devices for unicast and/or multicast link establishment and maintenance. A wireless transmit receive unit (WTRU) may send a link establishment request broadcast message, wherein in the link may be for multicast, unicast, or groupcast. The WTRU may receive a link establishment response broadcast message and a connectivity report. The WTRU may then send a link establishment confirmation broadcast message once a multicast or unicast link has been established, at which point the WTRU may send and receive a multicast message. The link establishment request message may be sent based on one or more triggers: receiving a QoS flow, needing a new sidelink radio bearer, determining that a new QoS flow or radio bearer requires network controlled admission control, and/or receive a unicast and/or multicast establishment request. The WTRU may transmit a unicast and/or multicast usability signal (UMUS). The WTRU may preempt the established multicast or unicast link.

First claim

1 .- 20 . (canceled)

21 . A method for establishing a sidelink radio bearer (SLRB) for a quality of service (QoS) flow, the method comprising:
selecting a SLRB configuration for the SLRB to be established, from a plurality of SLRB configurations, based on a value associated with the QoS flow and a mapping of values to the SLRB configurations; and transmitting a sidelink reconfiguration message to a peer WTRU, the sidelink reconfiguration message including a subset of the selected SLRB configuration, the subset based on a capability of the peer WTRU.

22 . The method of claim 21 , further comprising:
receiving a confirmation message from the peer WTRU responsive to the sidelink reconfiguration message; establishing the SLRB responsive to the confirmation message; and transmitting data associated with the QoS flow to the peer WTRU on the established SLRB.

23 . The method of claim 21 , wherein the value associated with the QoS flow comprises a quality indicator.

24 . The method of claim 21 , wherein the value associated with the QoS flow comprises a vehicle-to-everything (V2X) service quality indicator (VQI).

25 . The method of claim 21 , wherein the value associated with the QoS flow comprises a PC5 quality indicator (PQI).

26 . The method of claim 21 , wherein the sidelink reconfiguration message comprises a RRCReconfiguration message.

27 . The method of claim 21 , wherein the SLRB configuration comprises a logical channel (LCH) configuration, feedback configuration, channel quality indicator (CQI) configuration, and/or flow-to-SLRB mapping.

28 . The method of claim 21 , wherein the subset of the SLRB configuration comprises a logical channel (LCH) configuration, feedback configuration, channel quality indicator (CQI) configuration, and/or flow-to-SLRB mapping.

29 . The method of claim 21 , further comprising triggering establishment of the SLRB responsive to the QoS flow being mapped to the SLRB.

30 . The method of claim 21 , further comprising releasing the SLRB responsive to a condition where no QoS flows are mapped to the SLRB.

31 . A wireless transmit/receive unit (WTRU) configured to establish a sidelink radio bearer (SLRB) for a quality of service (QoS) flow, comprising:
a processor operatively coupled to a transmitter and a receiver; the processor configured to select a SLRB configuration for the SLRB to be established, from a plurality of SLRB configurations, based on a value associated with the QoS flow and a mapping of values to the SLRB configurations; and the transmitter configured to transmit a sidelink reconfiguration message to a peer WTRU, the sidelink reconfiguration message including a subset of the selected SLRB configuration, the subset based on a capability of the peer WTRU.

32 . The WTRU of claim 31 , further comprising:
the receiver configured to receive a confirmation message from the peer WTRU responsive to the sidelink reconfiguration message; the processor and the transmitter configured to establish the SLRB responsive to the confirmation message; and the transmitter configured to transmit data associated with the QoS flow to the peer WTRU on the established SLRB.

33 . The WTRU of claim 31 , wherein the value associated with the QoS flow comprises a quality indicator.

34 . The WTRU of claim 31 , wherein the value associated with the QoS flow comprises a vehicle-to-everything (V2X) service quality indicator (VQI).

35 . The WTRU of claim 31 , wherein the value associated with the QoS flow comprises a PC5 quality indicator (PQI).

36 . The WTRU of claim 31 , wherein the sidelink reconfiguration message comprises a RRCReconfiguration message.

37 . The WTRU of claim 31 , wherein the SLRB configuration comprises a logical channel (LCH) configuration, feedback configuration, channel quality indicator (CQI) configuration, and/or flow-to-SLRB mapping.

38 . The WTRU of claim 31 , wherein the subset of the SLRB configuration comprises a logical channel (LCH) configuration, feedback configuration, channel quality indicator (CQI) configuration, and/or flow-to-SLRB mapping.

39 . The WTRU of claim 31 , wherein the processor is further configured to trigger establishment of the SLRB responsive to the QoS flow being mapped to the SLRB.

40 . The WTRU of claim 31 , wherein the processor is further configured to release the SLRB responsive to a condition where no QoS flows are mapped to the SLRB.

Assignees

• Idac Holdings Inc

Inventors

• Freda Martino M
• Deng Tao
• Hoang Tuong Duc
• El Hamss Aata
• Perras Michelle

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W76/14 Primary

  Direct-mode setup · CPC title

• H04W72/20 Primary

  Control channels or signalling for resource management · CPC title

• H04W72/543

  based on requested quality, e.g. QoS · CPC title

• H04W4/40 Primary

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title