US 12,587,924 B2Granted

Methods, apparatuses and systems directed to a change of WTRU to WTRU relay

AssigneeInterDigital Patent Holdings, Inc.

InventorsMichelle Perras, Samir Ferdi, Alec Brusilovsky, Xiaoyan Shi, Saad Ahmad

Life of this patent

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Abstract

Methods, apparatuses, systems, etc., directed to performing a change of relay are disclosed herein. In an embodiment, a WTRU may transmit a link modification request message to a target WTRU via a first relay WTRU for requesting a change of relay. The WTRU may receive a link modification accept message from the target WTRU via the first relay WTRU, indicating a (e.g., proposed) second relay WTRU (e.g., identifier). The WTRU may transmit a direct communication request message including the second relay WTRU identifier for indicating to the target WTRU acceptance of the proposed second relay WTRU. The WTRU may a receiving a direct communication accept message from the target WTRU via the second relay WTRU, indicating the traffic may be relayed via the second relay WTRU.

Claims20

Dependent claims

A method implemented in a source wireless transmit/receive unit (WTRU), wherein a first link has been established between the source WTRU and a first relay WTRU and wherein a second link has been established between the source WTRU and a second relay WTRU, the method comprising:

transmitting a link modification request message on the first link to the first relay WTRU to be used by the first relay WTRU to transmit a corresponding link modification request message to a target WTRU, wherein the link modification request message is a request for a change of relay for the target WTRU, and wherein the link modification request message comprises a relay reselection indication, a list of candidate relay identifiers and a first Internet Protocol address of the target WTRU;
receiving a link modification accept message on the first link from the first relay WTRU that is based on a corresponding link modification accept message originating from the target WTRU, wherein the link modification accept message indicates that the target WTRU accepts the request for the change of relay, and wherein the link modification accept message comprises the relay reselection indication, an identifier of the second relay WTRU and a second Internet Protocol address of the target WTRU to be used for communication via the second relay WTRU;
transmitting a link modification acknowledge message on the first link to the first relay WTRU to be used by the first relay WTRU to transmit a corresponding link modification acknowledge message to the target WTRU, wherein the link modification acknowledge message acknowledges a target WTRU's acceptance of the request for the change of relay, and wherein the link modification acknowledge message comprises a second Internet Protocol address of the source WTRU to be used for communication via the second relay WTRU;
and
switching Internet Protocol traffic directed to the target WTRU from the first link to the second link via the second relay WTRU.

2 more elements

A source wireless transmit/receive unit (WTRU), wherein a first link has been established between the source WTRU and a first relay WTRU and wherein a second link has been established between the source WTRU and a second relay WTRU, the source WTRU comprising:

a processor;
and
a transceiver operatively coupled to the processor, the processor being configured to:
transmit a link modification request message on the first link to the first relay WTRU to be used by the first relay WTRU to transmit a corresponding link modification request message to a target WTRU, wherein the link modification request message is a request for a change of relay for the target WTRU, and wherein the link modification request message comprises a relay reselection indication, a list of candidate relay identifiers and a first Internet Protocol address of the target WTRU;
receive a link modification accept message on the first link from the first relay WTRU that is based on a corresponding link modification accept message originating from the target WTRU, wherein the link modification accept message indicates that the target WTRU accepts the request for the change of relay, and wherein the link modification accept message comprises the relay reselection indication, an identifier of the second relay WTRU and a second Internet Protocol address of a target WTRU to be used for communication via the second relay WTRU;
transmit a link modification acknowledge message on the first link to the first relay WTRU to be used by the first relay WTRU to transmit a corresponding link modification acknowledge message to the target WTRU, wherein the link modification acknowledge message acknowledges a target WTRU's acceptance of the request for the change of relay, and wherein the link modification acknowledge message comprises a second Internet Protocol address of the source WTRU to be used for communication via the second relay WTRU;
and
switch Internet Protocol traffic directed to the target WTRU from the first link to the second link via the second relay WTRU.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/916,304Filed 6 Apr 2021 · us provisional application
Priority: 8 Apr 2020
Published: US 2023/0224778 A113 Jul 2023
Granted: 24 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04W 36/08
Hand-off or reselection arrangements: reselecting an access point
H04W 36/0038
With transfer of context information: of security context information
H04W 36/00835
Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists: determination of neighbour cell lists
H04W 36/00837
Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists: determination of triggering parameters for…