Remote UE control information establishment at a core network
A user device, UE, for a wireless communication system is described. The UE is to communicate with the wireless communication system via at least one relay UE, the UE and the relay UE communicating over a sidelink interface. When communicating with the wireless communication system via the relay UE, e.g., when starting and/or during a communication, the UE is to establish a network control layer in its protocol stack, and the network control layer is to provide some control information.
1 . A user device, UE, for a wireless communication system,
wherein the UE is to communicate with one or more further UEs over a sidelink interface,
wherein the UE is configured or pre-configured with common provisioning parameters, CPPs, for use when the UE is out of coverage and has no other valid provisioning parameters for a sidelink communication over the sidelink interface, the common provisioning parameters allowing the out of coverage UE to acquire an authorization for the UE to perform a sidelink communication over the sidelink interface,
wherein the UE is to generate a registration request, the registration request being understood only at a core network, CN, of the wireless communication system and causing the CN to check for the authorization of the UE, and
wherein the UE is to transmit the registration request using predefined or fixed communication parameters as defined by the common provisioning parameters over the sidelink interface to a relay UE either as data or in a control message.
2 . The user device, UE, of claim 1 , wherein the predefined or fixed transmission parameters include one or more of:
pre-authorized resources of the sidelink interface on which the out of coverage UE may transmit,
a pre-defined or fixed Radio Resource Control layer, RRC-layer, configuration to be used when using the CPPs, the RRC-layer configuration also including lower layer configurations,
pre-defined or fixed Quality of Service, QoS, levels
pre-defined or fixed Modulation Coding Scheme, MCS, levels.
3 . The user device, UE, of claim 1 , wherein acquiring the authorization includes activating provisioning parameters existing in the UE or acquiring provisioning parameters for the UE to perform sidelink communication.
4 . The user device, UE, of claim 3 , wherein the provisioning parameters include one or more of the following:
one or more policies,
one or more configuration parameters,
authorization to connect to the network, and/or to communicate over sidelink, and/or to use a certain frequency band in a certain geographical area,
a location, like Global Positioning System, GPS, coordinates, a zone, a paging area, a cell identity, cell-ID, a country, or a Public Land Mobile Network, PLMN,
a frequency, a carrier frequency, a bandwidth part, a resource pool, a subchannel, or a Physical Resource Block, PRB,
a duration,
a validity,
a start time,
a priority.
5 . The user device, UE, of claim 1 , wherein the common provisioning parameters are stored in
a memory of the UE,
a Universal Integrated Circuit Card, UICC, or a subscriber identities module, SIM, or a universal Subscriber Identity Module, USIM, card, or an embedded Subscriber Identity Module.
6 . The user device, UE, of claim 1 , wherein the UE is to receive from a core network entity the common provisioning parameters when the UE registers with the wireless communication network.
7 . The user device, UE, of claim 1 , wherein the UE is to receive, from a core network entity an update for the pre-configured or configured common provisioning parameters when the UE registers with the wireless communication network.
8 . The user device, UE, of claim 1 , wherein the common provisioning parameters are
universal in the sense that they are not bound to a particular geographical region, area or location, or
non-universal in the sense that they vary based on a particular geographic location, area or country.
9 . The user device, UE, of claim 1 , wherein, responsive to acquiring authorization, the UE is to perform the sidelink communication over the sidelink interface.
10 . The user device, UE, of claim 1 , wherein the UE is to perform one or more of the following operations:
receive over the sidelink interface from the relay UE the authorization from the CN,
send the registration request as data over the sidelink interface to the relay UE, wherein, when the relay UE is to forward the registration request to the CN as data, the UE is to associate the data with a tag, the tag allowing the relay UE to identify the data as the registration request from the UE and to map the registration request to a control message from the relay UE to the CN,
forward the registration request to the CN using a control message or as data, wherein, when the UE is to send the registration request in the control message, the control message includes a container and the UE is to place the registration request into the container to be mapped by the relay UE to a control message from the relay UE to the CN.
11 . The user device, UE, of claim 1 , wherein, responsive to a successful authorization, the UE is to establish a network control layer in its protocol stack, the network control layer to provide control information being understood only at a core network, CN, of the wireless communication system.
12 . The user device, UE, of claim 11 , wherein the UE is to generate the control information and to transmit the control information over the sidelink interface to the relay UE either as data or in a control message.
13 . The user device, UE, of claim 11 , wherein the UE is to include into the registration request the control information.
14 . The user device, UE, of claim 11 , wherein the control information includes one or more of:
a NAS message to be stored at the CN, wherein a response message from the CN indicates that the NAS message is accepted or rejected by the CN,
PLMN information that the UE was previously associated with, if the UE is out-of-coverage,
current PLMN information,
a unique UE ID assigned from the application,
a group ID of the UE,
a QoS profile requested by the application,
a location,
old PDU/PDN session information,
current PDU/PDN session information
assistance information.
15 . The user device, UE, of claim 14 , wherein the assistance information includes one or more of:
a preferred EC state of the UE,
DRX information,
an indication of one or more applications the UE is capable to support,
one or more QoS levels supported by the UE,
a preferred and/or supported network slice,
one or more preferred services for which the UE is to be paged,
a preferred Service and Session Continuity, SSC, mode.
16 . The user device, UE, of claim 1 , wherein, once the UE is successfully registered with the CN, it is capable of receiving one or more paging messages from the CN via the one or more relay UEs.
17 . The user device, UE, of claim 1 , wherein
the relay UE comprises a first entity that is capable of operating with the wireless communication system, and/or second entity that is capable of operating with a different wireless communication system, and
the sidelink interface provides a direct link to the first entity or a direct link to the second entity.
18 . A wireless communication system, comprising:
a core network, CN,
one or more relay user devices, relay UEs, and
one or more remote user devices, remote UEs,
wherein the remote UE is to communicate with one or more of the relay UEs over a sidelink interface, and wherein the remote UE is configured or pre-configured with common provisioning parameters, CPPs, for use when the remote UE is out of coverage and has no other valid provisioning parameters for a sidelink communication over the sidelink interface, the common provisioning parameters allowing the out of coverage remote UE to acquire an authorization for the remote UE to perform a sidelink communication over the sidelink interface,
wherein the remote UE is to generate a registration request, the registration request being understood only at the core network, CN, of the wireless communication system and causing the CN to check for the authorization of the remote UE, and
wherein the remote UE is to transmit the registration request using predefined or fixed communication parameters as defined by the common provisioning parameters over the sidelink interface to the relay UE either as data or in a control message.
19 . A method of operating a user device, UE, for a wireless communication system, wherein the UE is to communicate with one or more further UEs over a sidelink interface, the method comprising:
configuring or pre-configuring the UE with common provisioning parameters, CPPs, for use when the UE is out of coverage and has no other valid provisioning parameters for a sidelink communication over the sidelink interface, the common provisioning parameters allowing the out of coverage UE to acquire an authorization for the UE to perform a sidelink communication over the sidelink interface,
wherein the UE generates a registration request, the registration request being understood only at a core network, CN, of the wireless communication system and causing the CN to check for the authorization of the UE, and
wherein the UE transmits the registration request using predefined or fixed communication parameters as defined by the common provisioning parameters over the sidelink interface to a relay UE either as data or in a control message.