TECHNIQUES FOR ASSISTED INITIAL ACCESS TO A CELL
Various aspects of the present disclosure relate to receiving, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state, and transmitting a request signal to the neighboring cell. Aspects of the present disclosure may relate to receiving, from the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell, where the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.
1 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state;
transmit a request signal to the neighboring cell; and
receive, from the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell,
wherein the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.
2 . The UE of claim 1 , wherein the first SI comprises a cell identity of the neighboring cell.
3 . The UE of claim 1 , wherein the first SI comprises a resource configuration for requesting the essential SI.
4 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to receive a broadcast from the neighboring cell, wherein the broadcast comprises one or more synchronization signals.
5 . The UE of claim 4 , wherein the first SI comprises the MIB for the neighboring cell, wherein the broadcast lacks the MIB for the neighboring cell, and wherein the on-demand SIB lacks the MIB for the neighboring cell.
6 . The UE of claim 4 , wherein the broadcast comprises the MIB for the neighboring cell, and wherein the on-demand SIB lacks the MIB for the neighboring cell.
7 . The UE of claim 1 , wherein the first SI indicates a set of parameters for the neighboring cell, the set of parameters comprising one or more of:
a system frame number (SFN) of the neighboring cell;
an SFN offset with respect to a respective SFN of the first cell;
a subcarrier spacing for a common channel of the neighboring cell;
a physical downlink control channel (PDCCH) configuration for a common PDCCH of the neighboring cell;
a frequency offset between a synchronization signal of the neighboring cell and an overall resource block grid of the neighboring cell;
a demodulation reference signal (DM RS) configuration for the neighboring cell;
or a combination thereof.
8 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to determine a system frame number (SFN) of the neighboring cell based at least in part on a respective SFN of the first cell.
9 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to:
receive a broadcast from the neighboring cell, wherein the broadcast comprises one or more synchronization signals;
reselect from the first cell to the neighboring cell based at least in part on the broadcast; and
transmit the request signal in response to reselecting to the neighboring cell.
10 . The UE of claim 9 , wherein the broadcast comprises a first portion of the essential SI, and wherein the on-demand SIB comprises a remainder of the essential SI.
11 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state;
transmit a request signal to the neighboring cell; and
receive, from the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell,
wherein the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.
12 . A base station for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the base station to:
transmit, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state;
receive a request signal via the neighboring cell; and
transmit, via the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell,
wherein the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.
13 . The base station of claim 12 , wherein the first SI comprises a cell identity of the neighboring cell.
14 . The base station of claim 12 , wherein the first SI comprises a resource configuration for requesting the essential SI.
15 . The base station of claim 12 , wherein the at least one processor is further configured to cause the base station to transmit, via the neighboring cell, a broadcast comprising one or more synchronization signals.
16 . The base station of claim 15 , wherein the first SI comprises the MIB for the neighboring cell, wherein the broadcast lacks the MIB for the neighboring cell, and wherein the on-demand SIB lacks the MIB for the neighboring cell.
17 . The base station of claim 15 , wherein the broadcast comprises the MIB for the neighboring cell, and wherein the on-demand SIB lacks the MIB for the neighboring cell.
18 . The base station of claim 12 , wherein the first SI indicates a set of parameters for the neighboring cell, the set of parameters comprising one or more of:
a system frame number (SFN) of the neighboring cell;
an SFN offset with respect to a respective SFN of the first cell;
a subcarrier spacing for a common channel of the neighboring cell;
a physical downlink control channel (PDCCH) configuration for a common PDCCH of the neighboring cell;
a frequency offset between a synchronization signal of the neighboring cell and an overall resource block grid of the neighboring cell;
a demodulation reference signal (DM RS) configuration for the neighboring cell;
or a combination thereof.
19 . The base station of claim 12 , wherein a system frame number (SFN) of the neighboring cell is based at least in part on a respective SFN of the first cell.
20 . A method performed by a base station, the method comprising:
transmitting, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state;
receiving a request signal via the neighboring cell; and
transmitting, via the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell,
wherein the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.