System information design in shared open radio access network radio unit systems
Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support system information design for systems that support spectral sharing and network entity sharing for multiple mobile network operators (MNOs). For example, a UE may monitor a radio frequency (RF) spectrum for synchronization signal blocks (SSBs) from a network entity and associated with an MNO. The RF spectrum and the network entity may be shared by the MNO and one or more other MNOs. The UE may receive the SSBs via a broadcast channel within the RF spectrum. The SSBs may be shared SSBs that may include dedicated system information associated with the MNO and shared system information associated with multiple MNOs. The UE may communicate via the RF spectrum according to the dedicated system information and the shared system information.
1 . A user equipment (UE) for wireless communication, comprising:
one or more processors;
one or more memories coupled with the one or more processors; and
instructions stored in the one or more memories and executable by the one or more processors to cause the UE to:
monitor a radio frequency spectrum for one or more physical synchronization signal blocks from a network entity and associated with a mobile network operator, wherein the radio frequency spectrum and the network entity are shared by the mobile network operator and one or more other mobile network operators;
receive, based at least in part on the monitoring, the one or more physical synchronization signal blocks via broadcast channel within the radio frequency spectrum, the one or more physical synchronization signal blocks comprising dedicated system information that is associated with the mobile network operator and shared system information that is associated with the mobile network operator and the one or more other mobile network operators;
receive, based at least in part on a size of a broadcast system information block exceeding a threshold size, a plurality of messages comprising the broadcast system information block, wherein the plurality of messages is received via one or more resources that are common to the mobile network operator and the one or more other mobile network operators, and wherein the broadcast system information block comprises the shared system information and the dedicated system information associated with the mobile network operator; and
communicate via the radio frequency spectrum in accordance with the dedicated system information and the shared system information.
2 . The UE of claim 1 , wherein the instructions to receive the one or more physical synchronization signal blocks are executable by the one or more processors to cause the UE to:
receive a broadcast information block that is common to the mobile network operator and the one or more other mobile network operators.
3 . The UE of claim 2 , wherein the instructions are further executable by the one or more processors to cause the UE to:
receive, via the broadcast information block, an indication of the one or more resources allocated for the broadcast system information block associated with the mobile network operator and the one or more other mobile network operators.
4 . The UE of claim 2 , wherein the instructions are further executable by the one or more processors to cause the UE to:
receive, via the broadcast information block, at least a portion of the shared system information, wherein the shared system information comprises an indication of a system frame number, a subcarrier spacing, a synchronization signal block subcarrier offset, one or more cell barring parameters, one or more cell reselection parameters, or any combination thereof for communications in accordance with the mobile network operator and the one or more other mobile network operators.
5 . The UE of claim 1 , wherein the instructions are further executable by the one or more processors to cause the UE to:
receive, via one or more second resources that are associated with the mobile network operator, a system information block extension comprising one or more fields that indicate the dedicated system information associated with the mobile network operator.
6 . The UE of claim 1 , wherein the plurality of messages comprises a tag for determining subsequent system information for the mobile network operator, and wherein the instructions are further executable by the one or more processors to cause the UE to:
store the tag for subsequent communications by the mobile network operator.
7 . The UE of claim 1 , wherein the broadcast system information block comprises an indication of a set of one or more resources for a physical random access channel procedure associated with the mobile network operator and the one or more other mobile network operators, and wherein the instructions are further executable by the one or more processors to cause the UE to:
transmit, via the set of one or more resources, a random access preamble associated with the mobile network operator.
8 . The UE of claim 7 , wherein the instructions are further executable by the one or more processors to cause the UE to:
transmit, via the random access preamble, a sequence that indicates the mobile network operator based at least in part on the set of one or more resources being common to the mobile network operator and the one or more other mobile network operators.
9 . The UE of claim 7 , wherein:
the broadcast system information block indicates a plurality of subsets of resources within the set of one or more resources;
the plurality of subsets of resources are separated in a time domain, in a frequency domain, or both; and
each subset of the plurality of subsets is associated with a respective mobile network operator.
10 . The UE of claim 1 , wherein the broadcast system information block comprises an indication of a set of one or more resources for a physical random access channel procedure associated with the mobile network operator, and wherein the instructions are further executable by the one or more processors to cause the UE to:
transmit a random access preamble via the set of one or more resources.
11 . A network node for wireless communication, comprising:
one or more processors;
one or more memories coupled with the one or more processors; and
instructions stored in the one or more memories and executable by the one or more processors to cause the network node to:
transmit one or more physical synchronization signal blocks via a broadcast channel within a radio frequency spectrum, wherein both the network node and the radio frequency spectrum are shared by a plurality of mobile network operators, the one or more physical synchronization signal blocks comprising dedicated system information that is associated with the mobile network operator and shared system information that is associated with the plurality of mobile network operators;
transmit, based at least in part on a size of a broadcast system information block exceeding a threshold size, a plurality of messages comprising the broadcast system information block, wherein the plurality of messages is transmitted via one or more resources that are common to the plurality of mobile network operators, and wherein the broadcast system information block comprises the shared system information and the dedicated system information associated with the mobile network operator; and
communicate via the radio frequency spectrum in accordance with the dedicated system information and the shared system information.
12 . The network node of claim 11 , wherein the instructions to transmit the one or more physical synchronization signal blocks are executable by the one or more processors to cause the network node to:
transmit a broadcast information block that is common to the plurality of mobile network operators.
13 . The network node of claim 12 , wherein the instructions are further executable by the one or more processors to cause the network node to:
transmit, via the broadcast information block, an indication of the one or more resources allocated for the broadcast system information block associated with the plurality of mobile network operators.
14 . The network node of claim 12 , wherein the instructions are further executable by the one or more processors to cause the network node to:
transmit, via the broadcast information block, an indication of a system frame number, a subcarrier spacing, a synchronization signal block subcarrier offset, one or more cell barring parameters, one or more cell reselection parameters, or any combination thereof for communications in accordance with the plurality of mobile network operators.
15 . The network node of claim 11 , wherein the instructions are further executable by the one or more processors to cause the network node to:
transmit, via one or more second resources that are associated with the mobile network operator, a system information block extension comprising one or more fields that indicate the dedicated system information associated with the mobile network operator.
16 . The network node of claim 11 , wherein the plurality of messages further comprises a tag for determining subsequent system information for the mobile network operator.
17 . The network node of claim 11 , wherein the broadcast system information block comprises an indication of a set of one or more resources for a physical random access channel procedure associated with the mobile network operator, and wherein the instructions are further executable by the one or more processors to cause the network node to:
receive, from a user equipment (UE) that is associated with the mobile network operator and via the set of one or more resources, a random access preamble associated with the mobile network operator;
forward the random access preamble to a second network node that is associated with the mobile network operator; and
receive, based at least in part on the random access preamble, a random access response message from the second network node.
18 . The network node of claim 11 , wherein the broadcast system information block comprises an indication of a set of one or more resources for a physical random access channel procedure associated with the plurality of mobile network operators, and wherein the instructions are further executable by the one or more processors to cause the network node to:
receive, via the set of one or more resources, a random access preamble.
19 . The network node of claim 18 , wherein the instructions are further executable by the one or more processors to cause the network node to:
forward the random access preamble to a plurality of second network nodes based at least in part on receiving the random access preamble via the set of one or more resources that are common to the plurality of mobile network operators, wherein the random access preamble comprises a sequence that indicates the mobile network operator based at least in part on the set of one or more resources being common to the plurality of mobile network operators; and
receive, from a second network node of the plurality of second network nodes, a random access response message based at least in part on the second network node being associated with the mobile network operator, wherein each second network node of the plurality of second network nodes is associated with a respective mobile network operator of the plurality of mobile network operators.
20 . The network node of claim 18 , wherein the instructions are further executable by the one or more processors to cause the network node to:
forward the random access preamble to a second network node associated with the mobile network operator based at least in part on a subset of resources via which the random access preamble is received indicating that the random access preamble is associated with the mobile network operator, the set of one or more resources comprising a plurality of subsets of resources that are separated in a time domain, in a frequency domain, or both, and wherein each subset of resources of the plurality of subsets of resources is associated with a respective mobile network operator; and
receive, from the second network node based at least in part on the random access preamble, a random access response message.
21 . The network node of claim 18 , wherein the instructions are further executable by the one or more processors to cause the network node to:
forward the random access preamble to a plurality of second network nodes based at least in part on receiving the random access preamble via the set of one or more resources that are common to the plurality of mobile network operators, the set of one or more resources comprising a plurality of subsets of resources that are separated in a time domain, in a frequency domain, or both, wherein the random access preamble is received via a subset of resources from among the set of one or more resources, and wherein each subset of resources of the plurality of subsets of resources is associated with a respective mobile network operator; and
receive, from a second network node of the plurality of second network nodes based at least in part on the random access preamble, a random access response message based at least in part on the subset of resources via which the random access preamble is received and the second network node being associated with the mobile network operator.
22 . A method for wireless communication at a user equipment (UE), comprising:
monitoring a radio frequency spectrum for one or more physical synchronization signal blocks from a network entity and associated with a mobile network operator, wherein the radio frequency spectrum and the network entity are shared by the mobile network operator and one or more other mobile network operators;
receiving, based at least in part on the monitoring, the one or more physical synchronization signal blocks via broadcast channel within the radio frequency spectrum, the one or more physical synchronization signal blocks comprising dedicated system information that is associated with the mobile network operator and shared system information that is associated with the mobile network operator and the one or more other mobile network operators;
receiving, based at least in part on a size of a broadcast system information block exceeding a threshold size, a plurality of messages comprising the broadcast system information block, wherein the plurality of messages is received via one or more resources that are common to the mobile network operator and the one or more other mobile network operators, and wherein the broadcast system information block comprises the shared system information and the dedicated system information associated with the mobile network operator; and
communicating via the radio frequency spectrum in accordance with the dedicated system information and the shared system information.
23 . The method of claim 22 , wherein receiving the one or more physical synchronization signal blocks comprises:
receiving broadcast information block that is common to the mobile network operator and the one or more other mobile network operators.
24 . A method for wireless communication at a network node, comprising:
transmitting one or more physical synchronization signal blocks via a broadcast channel within a radio frequency spectrum, wherein both the network node and the radio frequency spectrum are shared by a plurality of mobile network operators, the one or more physical synchronization signal blocks comprising dedicated system information that is associated with the mobile network operator and shared system information that is associated with the plurality of mobile network operators;
transmit, based at least in part on a size of a broadcast system information block exceeding a threshold size, a plurality of messages comprising the broadcast system information block, wherein the plurality of messages is transmitted via one or more resources that are common to the plurality of mobile network operators, and wherein the broadcast system information block comprises the shared system information and the dedicated system information associated with the mobile network operator; and
communicating via the radio frequency spectrum in accordance with the dedicated system information and the shared system information.
25 . The method of claim 24 , wherein transmitting the one or more physical synchronization signal blocks comprises:
transmitting a broadcast information block that is common to the plurality of mobile network operators.