Simultaneous sharing of spectrum in wireless communications

Patent metadata

Field	Value
Publication number	US-12081996-B2
Application number	US-202318471116-A
Country	US
Kind code	B2
Filing date	Sep 20, 2023
Priority date	Feb 19, 2019
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

Systems for simultaneous sharing of spectrum in wireless communications. Base Stations (BSs) of a plurality of mobile network operators in a cell may send downlink signals to their respective connected User Equipments (UEs) through a shared frequency spectrum. Further, the BSs may receive uplink signals from the UEs in the shared frequency spectrum.

First claim

We claim:

1. A User Equipment (UE) comprising:
a processor; and
a memory having instructions stored thereon, the instructions being executable by the processor to:
search for a first preamble signal from a base station (BS) of a first mobile network operator that issued a first Subscriber Identity Module (SIM) card being used in the UE, wherein the first preamble signal has a frequency in a frequency spectrum;
upon receiving the first preamble signal from a first BS of the first mobile network operator, register with the first BS for receiving downlink signals from the first BS and for sending uplink signals to the first BS, wherein the first BS is to communicate with the UE in the frequency spectrum;
receive a second preamble signal from a second BS of a second mobile network operator, wherein the second preamble signal has a frequency in the frequency spectrum;
determine, based on the second preamble signal, that downlink signals to be received from the second BS are to have a higher strength than that from the first BS;
in response to the determination, request the first BS a permission to be served by the second BS;
upon receiving the permission, connect with the second BS; and
receive downlink signals from the second BS in the frequency spectrum.

2. The UE as claimed in claim 1 , wherein a second SIM card is used in the UE, wherein the second SIM card is issued by a third mobile network operator, wherein the UE comprises a modem to:
receive a first data stream destined for the first SIM card, the first data stream corresponding to an application;
receive a second data stream destined for the second SIM card, the first data stream corresponding to the application; and
aggregate the first data stream and the second data stream for use by the application.

3. A method comprising:
searching, by a User Equipment (UE), for a first preamble signal from a base station (BS) of a first mobile network operator that issued a first Subscriber Identity Module (SIM) card being used in the UE, wherein the first preamble signal has a frequency in a frequency spectrum;
upon receiving the first preamble signal from a first BS of the first mobile network operator, registering, by the UE, with the first BS for receiving downlink signals from the first BS and for sending uplink signals to the first BS, wherein the first BS is to communicate with the UE in the frequency spectrum;
receiving, by the UE, a second preamble signal from a second BS of a second mobile network operator, wherein the second preamble signal has a frequency in the frequency spectrum;
determining, by the UE, based on the second preamble signal, that downlink signals to be received from the second BS are to have a higher strength than that from the first BS;
in response to the determination, requesting, by the UE, the first BS a permission to be served by the second BS;
upon receiving the permission, registering, by the UE, with the second BS; and
receiving, by the UE, downlink signals from the second BS in the frequency spectrum.

Assignees

• Indian Institute Of Tech Madras

Inventors

• K Giridhar
• C R Venkatesh

Classifications

• H04W16/32

  Hierarchical cell structures · CPC title

• H04W16/12

  Fixed resource partitioning · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W16/30 Primary

  Special cell shapes, e.g. doughnuts or ring cells · CPC title