CN-115553051-B - Remote UE control information establishment at core network

Abstract

A user equipment, UE, for a wireless communication system is described. The UE communicates with the wireless communication system via at least one relay UE, the UE communicating with the relay UE through a direct link interface. When communicating with a wireless communication system via a relay UE, e.g. when initiating and/or during communication, the UE establishes a network control layer in its protocol stack, which provides some control information.

Inventors

• Jasmina Mcmenna
• Roya Ibrahim lisaga
• Nicotine Srinivasan
• Barris Choctap
• Salem cervanian
• THOMAS WELLS
• Thomas Ferrenbach
• Thomas Skiller
• Cornelius Heller

Assignees

• 弗劳恩霍夫应用研究促进协会

Dates

Publication Date

20260512

Application Date

20210303

Priority Date

20200306

Claims (19)

1. 1. A user equipment, UE, of a wireless communication system, Wherein the UE communicates with one or more other UEs via a direct link interface, Wherein the UE is configured or preconfigured with a Common Provisioning Parameter (CPP) for use when the UE is not in coverage and has no other valid provisioning parameters for direct link communication over the direct link interface, the CPP allowing an out-of-coverage UE to obtain authorization for the UE to perform direct link communication over the direct link interface, Wherein the UE generates a registration request which is only understood at a core network CN of the wireless communication system and causes the CN to check the authorization of the UE, and Wherein the UE sends the registration request to a relay UE as data or in a control message over the direct link interface using predefined or fixed communication parameters defined by the CPP.
2. 2. The user equipment UE of claim 1, Wherein the predefined or fixed transmission parameters include one or more of the following: Pre-authorized resources of the direct link interface over which an out-of-coverage UE may transmit, A predefined or fixed radio resource control layer (RRC layer) configuration for use when using the CPP, the RRC layer configuration further comprising a lower layer configuration, Predefined or fixed quality of service (QoS) levels, -A predefined or fixed Modulation Coding Scheme (MCS) level.
3. 3. The user equipment, UE, of claim 1, wherein obtaining authorization comprises activating existing provisioning parameters in the UE or obtaining provisioning parameters for the UE to perform direct link communication.
4. 4. The user equipment, UE, of claim 3, wherein the provisioning parameters comprise one or more of: one or more of the policies may be used, One or more configuration parameters of the network system, Authorization, connection to the network, and/or communication via a direct link, and/or use of a specific frequency band in a specific geographical area, Location, global Positioning System (GPS) coordinates, region, paging area, cell identification number (ID), country or Public Land Mobile Network (PLMN), Frequency, carrier frequency, bandwidth part, resource pool, sub-channel or Physical Resource Block (PRB), The duration of time is chosen to be chosen, The effectiveness of the treatment is achieved by the fact that, The start-up time is chosen to be chosen, -Priority.
5. 5. The user equipment, UE, of claim 1, wherein the common provisioning parameters are stored at -A memory of the UE, or -Universal Integrated Circuit Card (UICC) or Subscriber Identity Module (SIM), or Universal Subscriber Identity Module (USIM), card or embedded subscriber identity module.
6. 6. The user equipment, UE, of claim 1, wherein the UE receives the common provisioning parameters from a core network entity, such as a PCF, over a Uu interface when the UE registers with a wireless communication network.
7. 7. The user equipment, UE, of claim 1, wherein the UE receives an update of a pre-configured or configured common provisioning parameter from a core network entity when the UE registers with a wireless communication network.
8. 8. The user equipment, UE, of claim 1, wherein the common provisioning parameters are-generic, not limited to a particular geographic region, area or location, or Non-universal, specific geographic location, region or country based.
9. 9. The user equipment, UE, of claim 1, wherein the UE performs direct link communication over the direct link interface in response to obtaining authorization.
10. 10. The user equipment, UE, of claim 1, wherein the UE performs one or more of: receiving authorization from the CN from the relay UE through the direct link interface; Transmitting the registration request as data to the relay UE through the direct link interface, wherein when the relay UE forwards the registration request as data to the CN, the UE associates the data with a flag that allows the relay UE to identify the data as the registration request from the UE and map the registration request to a control message from the relay UE to the CN; Forwarding the registration request to the CN using a control message or as data, wherein the control message comprises a container when the UE sends the registration request in the control message, and the UE places the registration request in the container to be mapped by the relay UE to the control message from the relay UE to the CN.
11. 11. The user equipment, UE, of claim 1, wherein in response to a successful grant, the UE establishes a network control layer in its protocol stack that provides control information that is only understood at a core network, CN, of the wireless communication system.
12. 12. The user equipment, UE, of claim 11, wherein the UE generates control information and transmits the control information to the relay UE as data or in a control message over the direct link interface.
13. 13. The user equipment, UE, of claim 11, wherein the UE includes the control information in the registration request.
14. 14. The user equipment, UE, of claim 11, wherein the control information comprises one or more of: NAS messages to be stored at a CN, wherein a response message from the CN indicates that the NAS message is accepted or rejected by the CN, PLMN information previously associated with said UE, if said UE is out of coverage, -Current PLMN information, A unique UE ID assigned from the application, The group ID of the UE is chosen, -Applying the requested QoS profile, The location of the point of the beam, Old PDU/PDN session information, Current PDU/PDN session information, -Auxiliary information.
15. 15. The user equipment, UE, of claim 14, wherein the assistance information comprises one or more of: the preferred EC state of the UE, -A DRX information, An indication of one or more applications that the UE is capable of supporting, One or more QoS levels supported by the UE, Preferred and/or supported network slices, One or more preferred services to be paged by the UE, Preferred service and session continuity SSC pattern.
16. 16. The user equipment, UE, of claim 1, wherein the UE is capable of receiving one or more paging messages from the CN via the one or more relay UEs once the UE successfully registers with the CN.
17. 17. The user equipment UE of claim 1, wherein The relay UE includes a first entity operable with the wireless communication system and/or a second entity operable with a different wireless communication system, and The direct link interface provides a direct link to the first entity or to the second entity.
18. 18. A wireless communication system, comprising: the core network CN is configured to receive, One or more relay user equipments, relay UE, and One or more remote user equipments, remote UEs, wherein the remote UEs communicate with one or more of the relay UEs over a direct link interface, and wherein the remote UEs are configured or preconfigured with a common provisioning parameter, CPP, for use when the remote UEs are not in coverage and have no other valid provisioning parameters for direct link communication over the direct link interface, the CPP allowing out-of-coverage remote UEs to obtain authorization for the remote UEs to perform direct link communication over the direct link interface, Wherein the remote UE generates a registration request that is only understood at the core network CN of the wireless communication system and causes the CN to check the authorization of the remote UE, and Wherein the remote UE sends the registration request to the relay UE as data or in a control message over the direct link interface using predefined or fixed communication parameters defined by the CPP.
19. 19. A method for operating a user equipment, UE, of a wireless communication system, wherein the UE communicates with one or more other UEs over a direct link interface, the method comprising: configuring or pre-configuring the UE using a common provisioning parameter CPP for use when the UE is not in coverage and has no other valid provisioning parameters for direct link communication over the direct link interface, the CPP allowing an out-of-coverage UE to obtain authorization for the UE to perform direct link communication over the direct link interface, Wherein the UE generates a registration request which is only understood at a core network CN of the wireless communication system and causes the CN to check the authorization of the UE, and Wherein the UE sends the registration request to a relay UE as data or in a control message over the direct link interface using predefined or fixed communication parameters defined by the CPP.

Description

Remote UE control information establishment at core network Description The present application relates to the field of wireless communication systems or networks, and more particularly to communication between a user equipment or user terminal (UE) and a core network of a wireless communication system or network via one or more relay user equipments (relay UEs). Embodiments relate to a method allowing to establish at a core network CN certain control contexts of a remote UE, which are not present at the CN when the remote UE is connected to a wireless communication network via a relay UE. Other embodiments relate to methods of allowing an out-of-coverage UE to access a wireless communication network via a relay, although certain provisioning parameters that allow the UE to perform direct link operations may not be available or may no longer be valid at the UE. Fig. 1 is a schematic diagram of an example of a terrestrial wireless network 100, including a core network 102 and one or more radio access networks RAN 1、RAN2、…RANN as shown in fig. 1 (a). Fig. 1 (b) is a schematic representation of an example of a radio access network RAN n, the RAN N may include one or more base stations gNB 1 to gNB 5, each serving a particular area around the base stations schematically illustrated by respective cells 106 1 to 106 5. The base station is provided to serve users within the cell. One or more base stations may serve users in licensed and/or unlicensed frequency bands. The term Base Station (BS) refers to a gNB in a 5G network, an eNB in UMTS/LTE-a Pro, or just a BS in other mobile communication standards. The user may be a fixed device or a mobile device. The wireless communication system may be accessed by mobile or fixed IoT devices connected to base stations or users. The mobile devices or IoT devices may include physical devices, ground vehicles such as robots or automobiles, aircraft (such as manned or Unmanned Aircraft (UAV), the latter also known as unmanned aerial vehicles), buildings and other items or devices (with electronic devices, software, sensors, actuators, etc. embedded therein, as well as network connections that enable these devices to collect and exchange data over existing network infrastructure). Fig. 1 (b) shows an exemplary view of only five cells, however, RAN n may include more or fewer such cells, and RAN n may also include only one base station. Fig. 1 (b) shows two user UEs 1 and 2, also referred to as user equipment UE, located in a cell 106 2 and served by a base station gNB 2. Another user UE 3 is shown in cell 106 4 served by base station gNB 4. Arrows 108 1、1082 and 108 3 schematically represent uplink/downlink connections for transmitting data from user UEs 1、UE2 and 3 to base station gNB 2,、gNB4 or for transmitting data from base station gNB 2、gNB4 to user UE 1、UE2、UE3. This may be done on licensed bands or on unlicensed bands. Furthermore, fig. 1 (b) shows two IoT devices 110 1 and 110 2 in cell 106 4, which may be fixed or mobile devices. IoT device 110 1 accesses a wireless communication system via base station gNB 4 to receive and transmit data, as represented schematically by arrow 112 1. IoT device 110 2 accesses a wireless communication system via user UE 3, as schematically represented by arrow 112 2. Each base station gNB 1 to gNB 5 may be connected to the core network 102, e.g. via an S1 interface, via respective backhaul links 114 1 to 114 5, which are schematically represented in fig. 1 (b) by arrows pointing to the "core". The core network 102 may be connected to one or more external networks. The external network may be the internet or a private network such as an intranet or any other type of campus network, such as a private WiFi or 4G or 5G mobile communication system. Furthermore, some or all of the individual base stations gNB 1 to gNB 5 may be interconnected via respective backhaul links 116 1 to 116 5, for example via an S1 or X2 interface or an XN interface in NR, which is schematically represented in fig. 1 (b) by an arrow pointing to "gNBs". The direct link channel allows direct communication between UEs, also referred to as device-to-device (D2D) communication. The direct link interface in 3GPP is named PC5. For data transmission, a physical resource grid may be used. The physical resource grid may include a set of resource elements to which various physical channels and physical signals are mapped. For example, the physical channels may include physical downlink, uplink, and direct link shared channels (PDSCH, PUSCH, PSSCH) carrying user-specific data (also referred to as downlink, uplink, and direct link payload data), physical Broadcast Channels (PBCH) carrying, for example, a Master Information Block (MIB) and one or more System Information Blocks (SIBs), and physical downlink, uplink, and direct link control channels (PDCCH, PUCCH, PSSCH) carrying Downlink Control Information (DCI), uplink Control Information (UCI), and direc