US-12621715-B2 - Session offloading for L2 UE-to-network relay architecture

US12621715B2US 12621715 B2US12621715 B2US 12621715B2US-12621715-B2

Abstract

A remote UE or a relay UE may identify a configuration for a relocation of one or more session termination points associated with one or more radio access packet data sessions from the relay UE to the remote UE or from the remote UE to the relay UE. The remote UE or the relay UE may execute the relocation of the one or more session termination points associated with the one or more radio access packet data sessions from the relay UE to the remote UE or from the remote UE to the relay UE based on the configuration. The session termination point relocation may be controlled by the remote UE, the relay UE, or a network entity. The remote UE may transmit or receive data with a network via the relay UE based on the relocation of the one or more session termination points.

Inventors

Karthika Paladugu
Hong Cheng
Gavin Bernard Horn
Soo Bum Lee
Ozcan Ozturk

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260505
Application Date: 20211111

Claims (20)

1 . An apparatus for wireless communication at a first wireless device, comprising: memory; and one or more processors coupled to the memory and configured to cause the first wireless device to: identify at least one configuration for a relocation of one or more first session termination points associated with one or more radio access packet data sessions from a second wireless device to the first wireless device or from the first wireless device to the second wireless device; execute the relocation of the one or more first session termination points associated with the one or more radio access packet data sessions from the second wireless device to the first wireless device or from the first wireless device to the second wireless device based on the at least one configuration for the relocation of the one or more first session termination points; communicate, with the second wireless device, a message for a sequence number (SN) status transfer that comprises a hyper frame number (HFN) associated with a missing service data unit (SDU); and transmit or receive data with a network, based on a radio access security key material and the SN status transfer, wherein the radio access security key material is based on an original security key material associated with the second wireless device prior to execution of the relocation of the one or more first session termination points, via the second wireless device based on the relocation of the one or more first session termination points, wherein the radio access security key material is different from the original security key material, and wherein the original security key material is associated with a UE to base station connection.
2 . The apparatus of claim 1 , further comprising at least one antenna coupled to the memory and the one or more processors, wherein the one or more processors are further configured to cause the first wireless device to: transmit, to the second wireless device, an indication of whether the first wireless device supports the relocation of the one or more first session termination points.
3 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the second wireless device to the first wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the first wireless device to: receive, from the second wireless device, a first indication of a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the second wireless device to the first wireless device and a second indication of a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the second wireless device to the first wireless device, wherein the second configuration comprises at least one of a service data adaptation protocol (SDAP) configuration, a packet data convergence protocol (PDCP) configuration, the radio access security key material, or a local link configuration that includes a local link quality of service (Qos) configuration, wherein at least one of the first configuration or the second configuration is associated with the second wireless device prior to the execution of the relocation of the one or more first session termination points, the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.
4 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the first wireless device to the second wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the first wireless device to: generate, at the first wireless device, a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the first wireless device to the second wireless device and a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the first wireless device to the second wireless device, wherein the second configuration comprises at least one of a service data adaptation protocol (SDAP) configuration, a packet data convergence protocol (PDCP) configuration, or the radio access security key material, wherein at least one of the first configuration or the second configuration is associated with the first wireless device prior to the execution of the relocation of the one or more first session termination points, the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.
5 . The apparatus of claim 4 , wherein the one or more processors are further configured to cause the first wireless device to: transmit, to the second wireless device, a first indication of the first configuration and a second indication of the second configuration; and suspend or release the one or more PDU sessions, one or more radio access SDAP or PDCP entities, or one or more local link channels associated with the one or more corresponding bearers.
6 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the first wireless device to: transmit, to a network entity, an indication of a preference associated with the relocation of the one or more first session termination points.
7 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the second wireless device to the first wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the first wireless device to: receive, from the second wireless device, a first indication of a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the second wireless device to the first wireless device and a second indication of a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the second wireless device to the first wireless device, wherein the first configuration and the second configuration are from a network entity, wherein the second configuration comprises at least one of a service data adaptation protocol (SDAP) configuration, a packet data convergence protocol (PDCP) configuration, or the radio access security key material, and wherein the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.
8 . The apparatus of claim 7 , wherein the radio access security key material is associated with the second wireless device prior to the execution of the relocation of the one or more first session termination points.
9 . The apparatus of claim 7 , wherein the radio access security key material is based on the original security key material associated with the second wireless device prior to the execution of the relocation of the one or more first session termination points, and wherein a relationship between the radio access security key material and the original security key material is based on a multi-RAT dual connectivity (MR-DC) key derivation.
10 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the first wireless device to the second wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the first wireless device to: receive, from a network entity, a third indication of a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the first wireless device to the second wireless device and a fourth indication of a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the first wireless device to the second wireless device, wherein the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.
11 . The apparatus of claim 10 , wherein the one or more processors are further configured to cause the first wireless device to: release the one or more PDU sessions, one or more bearers, or one or more local link channels associated with the one or more corresponding bearers.
12 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the second wireless device to the first wireless device, and wherein to communicate the message for the SN status transfer, the one or more processors are configured to cause the first wireless device to: receive, from the second wireless device, the message for the SN status transfer; and receive, from the second wireless device, forwarded first data.
13 . The apparatus of claim 1 , wherein the relocation of the one or more first session termination points is from the first wireless device to the second wireless device, and wherein to communicate the message for the SN status transfer, the one or more processors are configured to cause the first wireless device to: transmit, to the second wireless device, the message for the SN status transfer; and forward first data to the second wireless device.
14 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the first wireless device to perform at least one of: release one or more first protocol data unit (PDU) sessions, one or more radio access service data adaptation protocol (SDAP) entities, one or more packet data convergence protocol (PDCP) entities, or one or more local link channels in response to at least one of a first local link radio link failure (RLF), reception of a first indication of a first radio access link RLF from the second wireless device, reception of an indication of second wireless device mobility, or first wireless device mobility from the second wireless device, wherein the one or more first PDU sessions, the one or more SDAP entities, the one or more PDCP entities, or the one or more local link channels are associated with at least some of the one or more first session termination points associated with the relocation; or resume one or more second PDU sessions or one or more radio access bearers over a radio access link or a relay link via a third wireless device in response to at least one of a second local link RLF, receipt of a second indication of a second radio access link RLF, first wireless mobility from the second wireless device, or second wireless mobility, wherein the one or more second PDU sessions or the one or more radio access bearers are associated with at least one of the one or more first session termination points associated with the relocation.
15 . The apparatus of claim 1 , wherein each of the one or more radio access packet data sessions corresponds to a protocol data unit (PDU) session associated with a Uu radio access technology (RAT).
16 . An apparatus for wireless communication at a second wireless device, comprising: memory; and one or more processors coupled to the memory and configured to cause the second wireless device to: identify at least one configuration for a relocation of one or more first session termination points associated with one or more radio access packet data sessions from the second wireless device to a first wireless device or from the first wireless device to the second wireless device; execute the relocation of the one or more first session termination points associated with the one or more radio access packet data sessions from the second wireless device to the first wireless device or from the first wireless device to the second wireless device based on the at least one configuration for the relocation of the one or more first session termination points; communicate, with the first wireless device, a message for a sequence number (SN) status transfer that comprises a hyper frame number (HFN) associated with a missing service data unit (SDU); and forward data between a network and the first wireless device based on at least one first radio access packet data session of the one or more radio access packet data sessions, the SN status transfer, and a radio access security key material, wherein the radio access security key material is based on an original security key material associated with the second wireless device prior to execution of the relocation of the one or more first session termination points, wherein at least one first session termination point of the one or more first session termination points is associated with the at least one first radio access packet data session associated with the relocation, wherein the radio access security key material is different from the original security key material, and wherein the original security key material is associated with a UE to base station connection.
17 . The apparatus of claim 16 , further comprising at least one antenna coupled to the memory and the one or more processors, wherein the one or more processors are further configured to cause the second wireless device to: receive, from the first wireless device, an indication of whether the first wireless device supports the relocation of the one or more first session termination points.
18 . The apparatus of claim 16 , wherein the relocation of the one or more first session termination points is from the second wireless device to the first wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the second wireless device to: generate, at the second wireless device, a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the second wireless device to the first wireless device and a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the second wireless device to the first wireless device, wherein the second configuration comprises at least one of a service data adaptation protocol (SDAP) configuration, a packet data convergence protocol (PDCP) configuration, the radio access security key material, or a local link configuration that includes a local link quality of service (QoS) configuration, wherein at least one of the first configuration or the second configuration is associated with the second wireless device prior to the execution of the relocation of the one or more first session termination points, the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.
19 . The apparatus of claim 18 , wherein the one or more processors are further configured to cause the second wireless device to: transmit, to the first wireless device, a first indication of the first configuration and a second indication of the second configuration; and suspend or release the one or more PDU sessions or one or more radio access SDAP or PDCP entities associated with the one or more corresponding bearers.
20 . The apparatus of claim 16 , wherein the relocation of the one or more first session termination points is from the first wireless device to the second wireless device, and to identify the at least one configuration for the relocation of the one or more first session termination points, the one or more processors are further configured to cause the second wireless device to: receive, from the first wireless device, a first indication of a first configuration for relocation of one or more second session termination points associated with one or more protocol data unit (PDU) sessions from the first wireless device to the second wireless device and a second indication of a second configuration for relocation of one or more third session termination points associated with one or more corresponding bearers from the first wireless device to the second wireless device, wherein the second configuration comprises at least one of a service data adaptation protocol (SDAP) configuration, a packet data convergence protocol (PDCP) configuration, or the radio access security key material, wherein at least one of the first configuration or the second configuration is associated with the first wireless device prior to the execution of the relocation of the one or more first session termination points, the at least one configuration includes the first configuration and the second configuration, and the one or more first session termination points include the one or more second session termination points and the one or more third session termination points.

Description

INTRODUCTION The present disclosure relates generally to communication systems, and more particularly, to session management in connection with a relay link in a wireless communication system. Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. BRIEF SUMMARY The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. In an aspect of the disclosure, a method is provided. The method may be performed by a first wireless device. The method includes identifying at least one configuration for a relocation of one or more first session termination points associated with one or more radio access packet data sessions from a second wireless device to the first wireless device or from the first wireless device to the second wireless device. The method includes executing the relocation of the one or more first session termination points associated with the one or more radio access packet data sessions from the second wireless device to the first wireless device or from the first wireless device to the second wireless device based on the at least one configuration for the relocation of the one or more first session termination points. The method includes transmitting or receiving data with a network via the second wireless device based on the relocation of the one or more first session termination points. In another aspect of the disclosure, an apparatus is provided. The apparatus may be a first wireless device. The apparatus includes a memory and at least one processor coupled to the memory, the memory and the at least one processor configured to: identify at least one configuration for a relocation of one or more first session termination points associated with one or more radio access packet data sessions from a second wireless device to the first wireless device or from the first wireless device to the second wireless device; execute the relocation of the one or more first session termination points associated with the one or more radio access packet data sessions from the second wireless device to the first wireless device or from the first wireless device to the second wireless device based on the at least one configuration for the relocation of the one or more first session termination points; and transmit or receive data with a network via the second wireless device based on the relocation of the one or more first session termination points. In another aspect of the disclosure, an apparatus is provided. The apparatus may be a first wireless device. The apparatus includes means for identifying at least one configuration for a relocation of one or more first session termination points associated with one or more radio access packet data sessions from a second wireless device to the first wireless device or from the first wireless device to the second wireless device. The apparatus includes means for executing the relocation o