# US 2019/0320487 A1 · Wireless Communications Using Virtualized Base Stations Network

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- Number: US 2019/0320487 A1
- Document ID: US20190320487A1
- Status: Published application
- Kind: A1
- Application number: 15/954,571
- Filed: 2018-04-16
- Published: 2019-10-17
- Earliest claimed: 2018-04-16
- Assignees: Phazr, Inc.
- Applicants: Phazr, Inc.
- Inventors: Farooq Khan
- Web page: https://patentgrep.com/patent/US20190320487A1

## CPC

- H04W 76/15: Setup of multiple wireless link connections
- H04W 76/27: Transitions between radio resource control [RRC] states
- G06F 9/45558: {Hypervisor-specific management and integration aspects}
- H04B 7/0413: MIMO systems
- H04B 7/0617: {for beam forming}
- G06F 2009/45595: {Network integration; Enabling network access in virtual machine instances}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04B: TRANSMISSION

## Abstract

A method for wireless communication includes transmitting at least first and second uplink signals by a UE to first and second virtualized radio units, respectively. The first and second uplink signals are processed by one or more virtual machines shared by both the first and second radio units. The UE switches connection from the first virtualized radio unit to the second virtualized radio unit without a transfer of context information from the first virtualized radio unit to the second virtualized radio unit. A first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver. A second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

## Claims

### Claim 1

A method for wireless communication, comprising:
transmitting a first uplink signal by a user equipment (UE) to a first virtualized radio unit;
transmitting a second uplink signal by the UE to a second virtualized radio unit,
wherein the first and second uplink signals are processed by one or more virtual machines shared by both the first and second radio units, and
wherein a first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 2 (depends on 1)

The method of claim 1, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit without a transfer of context information from the first virtualized radio unit to the second virtualized radio unit.

### Claim 3 (depends on 1)

The method of claim 1, wherein a third virtual machine implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
maintaining connection by the UE with the first virtual radio unit during a first time interval; and
switching connection by the UE during a second time interval from the first virtual radio unit to the second virtual radio unit.

### Claim 5 (depends on 1)

The method of claim 1, wherein the UE switches connection from the first virtual radio unit to the second virtual radio unit when the UE changes location due to mobility.

### Claim 6 (depends on 1)

The method of claim 1, wherein the UE switches connection from the first virtual radio unit to the second virtual radio unit due to changing channel conditions or loading in the network.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first, second and third virtual machines are located in at least one of the virtualized radio units and are shared by the plurality of virtualized radio units.

### Claim 8 (depends on 1)

The method of claim 1, wherein the first, second and third virtual machines are not remotely located from the radio units.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first and second virtualized radio units are located in a same radio base station node.

### Claim 10 (depends on 1)

The method of claim 1, wherein the first and second virtualized radio units are located in different radio base station nodes.

### Claim 11

A method for wireless communication, comprising:
transmitting a first uplink signal by a user equipment (UE) to a first virtualized radio unit during a first time interval, wherein the UE maintains connection with the first radio unit during the first time interval;
switching connection by the UE during a second time interval from the first virtualized radio unit to a second virtualized radio unit;
transmitting a second uplink signal by the UE to the second virtualized radio unit during the second time interval,
wherein the first and second uplink signals are processed by one or more virtual machines shared by both the first and second radio units, and
wherein a first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 12 (depends on 11)

The method of claim 11, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit without a transfer of context information from the first virtualized radio unit to the second virtualized radio unit.

### Claim 13 (depends on 11)

The method of claim 11, wherein a third virtual machine implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 14 (depends on 11)

The method of claim 11, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit when the UE changes location due to mobility.

### Claim 15 (depends on 11)

The method of claim 11, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit due to changing channel conditions or loading in the network.

### Claim 16 (depends on 11)

The method of claim 11, wherein the first, second and third virtual machines are located in at least one of the virtualized radio units and are shared by the plurality of virtualized radio units.

### Claim 17 (depends on 11)

The method of claim 11, wherein the first and second virtualized radio units are located in a same radio base station node.

### Claim 18 (depends on 11)

The method of claim 11, wherein the first and second virtualized radio units are located in different radio base station nodes.

### Claim 19 (depends on 11)

The method of claim 11, wherein the first, second and third virtual machines are not remotely located from the virtualized radio units.

### Claim 20

A method for wireless communication, comprising:
receiving a first downlink signal at a user equipment (UE), wherein the first downlink signal is transmitted by a first virtualized radio unit;
receiving a second downlink signal at the UE, wherein the second downlink signal is transmitted by a second virtualized radio unit,
wherein prior to transmission the first and second downlink signals are processed by one or more virtual machines shared by both the first and second radio units, and
wherein a first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 21 (depends on 20)

The method of claim 20, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit without a transfer of context information from the first virtualized radio unit to the second virtualized radio unit.

### Claim 22 (depends on 20)

The method of claim 20, wherein a third virtual machine implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 23 (depends on 20)

The method of claim 20, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit when the UE changes location due to mobility.

### Claim 24 (depends on 20)

The method of claim 20, wherein the UE switches connection from the first virtual radio unit to the second virtual radio unit due to changing channel conditions or loading in the network.

### Claim 25 (depends on 20)

The method of claim 20, wherein the first, second and third virtual machines are located in at least one of the virtualized radio units and are shared by the plurality of virtualized radio units.

### Claim 26 (depends on 20)

The method of claim 20, wherein the first and second virtualized radio units are located in a same radio base station node.

### Claim 27 (depends on 20)

The method of claim 20, wherein the first and second virtualized radio units are located in different radio base station nodes.

### Claim 28

A method for wireless communication, comprising:
receiving a first downlink signal at a user equipment (UE) when the UE is at a first location, wherein the first downlink signal is transmitted by a first virtualized radio unit;
moving by the UE from the first location to a second location and switching connection from the first virtualized radio unit to a second virtualized radio unit;
receiving a second downlink signal at the UE, wherein the second downlink signal is transmitted by the second virtualized radio unit;
wherein prior to transmission the first and second downlink signals are processed by one or more virtual machines shared by both the first and second radio units, and
wherein a first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 29 (depends on 28)

The method of claim 28, wherein a third virtual machine implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 30 (depends on 28)

The method of claim 28, wherein the UE switches connection from the first virtualized radio unit to the second virtualized radio unit in response to moving from the first location to the second location.

### Claim 31

A method for wireless communication, comprising:
transmitting at least first and second uplink signals by a user equipment (UE) to first and second virtualized radio units, respectively, wherein the first and second uplink signals are processed by one or more containers shared by both the first and second radio units, and
wherein a first container implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second container implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 32 (depends on 31)

The method of claim 31, wherein a third container implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 33

A method for wireless communication, comprising:
receiving a first downlink signal at a user equipment (UE) during a first time interval, wherein the first downlink signal is transmitted by a first virtualized radio unit;
receiving a second downlink signal at the UE during a second time interval, wherein the second downlink signal is transmitted by a second virtualized radio unit,
wherein prior to transmission the first and second downlink signals are processed by one or more containers shared by both the first and second radio units, and
wherein a first container implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and
wherein a second container implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer.

### Claim 34 (depends on 33)

The method of claim 33, wherein a third container implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.

### Claim 35

A method for wireless communication, comprising:
transmitting uplink signals by a user equipment (UE);
receiving the uplink signals by a virtualized radio unit, wherein the uplink signals are processed by one or more virtual machines in virtualized radio unit, and wherein a first virtual machine implements at least one of a lower physical layer (PHY-Low), an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and a radio frequency (RF) transceiver, and wherein a second virtual machine implements at least one of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a higher physical (PHY-high) layer; and
receiving downlink signals by the UE, wherein the downlink signals are transmitted by the virtualized radio unit.

### Claim 36 (depends on 35)

The method of claim 35, wherein a third virtual machine implements at least one of a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Radio Resource Control (RRC) layer.