# US 12,004,234 B2 · Transmission and access with multiple panels

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- Number: US 12,004,234 B2
- Document ID: US12004234B2
- Status: Granted
- Kind: B2
- Application number: 17/529,338
- Filed: 2021-11-18
- Published: 2022-05-19
- Granted: 2024-06-04
- Earliest claimed: 2020-11-18
- Assignees: Ofinno, LLC
- Applicants: Ofinno, LLC
- Inventors: Kai Xu; Esmael Hejazi Dinan; Hua Zhou; Yunjung Yi; Ali Cagatay Cirik; Hyoungsuk Jeon; Jonghyun Park; Bing Hui
- Web page: https://patentgrep.com/patent/US12004234B2

## CPC

- H04W 74/0841: {with collision treatment}
- H04B 7/0691: {using subgroups of transmit antennas}
- H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 52/0245: {according to signal strength}
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W 74/002: {Transmission of channel access control information}
- H04W 74/0836: with 2-step access
- H04W 74/0838: using contention-free random access [CFRA]
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A wireless device receives configuration parameters indicating a first antenna panel and a second antenna panel. A first preamble of a first random access procedure is transmitted via the first antenna panel. The wireless device switches from the first antenna panel to the second antenna panel. In response to the switching, the first random access procedure is stopped and a second random access procedure based on the second antenna panel is initiated.

## Claims

### Claim 1

A method comprising:
receiving, by a wireless device, configuration parameters indicating a first antenna panel and a second antenna panel;
transmitting, via the first antenna panel, a first preamble of a first random access procedure;
receiving a random access response (RAR) message in response to transmitting the first preamble of the first random access procedure;
switching from the first antenna panel to the second antenna panel;
ignoring, in response to switching from the first antenna panel to the second antenna panel, the received RAR message; and
initiating a second random access procedure based on the second antenna panel.

### Claim 2 (depends on 1)

The method of claim 1, wherein the initiating the second random access procedure comprises transmitting, via the second antenna panel, a second preamble of the second random access procedure.

### Claim 3 (depends on 2)

The method of claim 2, wherein the second preamble is different from the first preamble.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
receiving a downlink control information (DCI) indicating the switching from the first antenna panel to the second antenna panel, wherein the switching is based on the DCI.

### Claim 5 (depends on 1)

The method of claim 1, wherein the switching from the first antenna panel to the second antenna panel is in response to:
a first reference signal received power (RSRP) value of a first reference signal (RS), associated with the first antenna panel, being less than a RSRP threshold value; and
a second RSRP value of a second RS, associated with the second antenna panel, being equal to or greater than the RSRP threshold value.

### Claim 6 (depends on 5)

The method of claim 5, wherein the configuration parameters further indicate:
the RSRP threshold value;
the first RS being associated with the first antenna panel; and
the second RS being associated with the second antenna panel.

### Claim 7 (depends on 5)

The method of claim 5, further comprising:
measuring the first RSRP value via the first antenna panel; and
measuring the second RSRP value via the second antenna panel.

### Claim 8 (depends on 1)

The method of claim 1, wherein the switching from the first antenna panel to the second antenna panel is in response to a maximum permissible exposure (MPE) value, of the first antenna panel, being higher than an MPE value of the second antenna panel.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first random access procedure is different from the second random access procedure.

### Claim 10

A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive configuration parameters indicating a first antenna panel and a second antenna panel;
transmit, via the first antenna panel, a first preamble of a first random access procedure;
receive a random access response (RAR) message in response to transmitting the first preamble of the first random access procedure;
switch from the first antenna panel to the second antenna panel;
ignore, in response to switching from the first antenna panel to the second antenna panel, the received RAR message; and
initiate a second random access procedure based on the second antenna panel.

### Claim 11 (depends on 10)

The wireless device of claim 10, wherein to initiate the second random access procedure, the instructions further cause the wireless device to transmit, via the second antenna panel, a second preamble of the second random access procedure.

### Claim 12 (depends on 11)

The wireless device of claim 11, wherein the second preamble is different from the first preamble.

### Claim 13 (depends on 10)

The wireless device of claim 10, wherein the instructions further cause the wireless device to:
receive a downlink control information (DCI) indicating the switching from the first antenna panel to the second antenna panel, wherein the switching is based on the DCI.

### Claim 14 (depends on 10)

The wireless device of claim 10, wherein the switching from the first antenna panel to the second antenna panel is in response to:
a first reference signal received power (RSRP) value of a first reference signal (RS), associated with the first antenna panel, being less than a RSRP threshold value; and
a second RSRP value of a second RS, associated with the second antenna panel, being equal to or greater than the RSRP threshold value.

### Claim 15 (depends on 14)

The wireless device of claim 14, wherein the configuration parameters further indicate:
the RSRP threshold value;
the first RS being associated with the first antenna panel; and
the second RS being associated with the second antenna panel.

### Claim 16 (depends on 14)

The wireless device of claim 14, wherein the instructions further cause the wireless device to:
measure the first RSRP value via the first antenna panel; and
measure the second RSRP value via the second antenna panel.

### Claim 17 (depends on 10)

The wireless device of claim 10, wherein the switching from the first antenna panel to the second antenna panel is in response to a maximum permissible exposure (MPE) value, of the first antenna panel, being higher than an MPE value of the second antenna panel.

### Claim 18

A system comprising:
a base station; and
a wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from the base station, configuration parameters indicating a first antenna panel and a second antenna panel;
transmit, to the base station and via the first antenna panel, a first preamble of a first random access procedure;
receive a random access response (RAR) message in response to transmitting the first preamble of the first random access procedure;
switch from the first antenna panel to the second antenna panel;
ignore, in response to switching from the first antenna panel to the second antenna panel, the received RAR message; and
initiate a second random access procedure based on the second antenna panel.