# US 11,451,358 B2 · Medium access control (MAC) signaling for reference signal activation and quasi co-location indication in wireless communication networks

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- Number: US 11,451,358 B2
- Document ID: US11451358B2
- Status: Granted
- Kind: B2
- Application number: 16/764,684
- Filed: 2018-11-16
- Published: 2020-12-31
- Granted: 2022-09-20
- Earliest claimed: 2017-11-16
- Assignees: Telefonaktiebolaget L M Ericsson (publ)
- Applicants: Telefonaktiebolaget Lm Ericsson (Publ)
- Inventors: Helka-Liina Määttanen; Siva Muruganathan; Stephen Grant
- Web page: https://patentgrep.com/patent/US11451358B2

## CPC

- H04B 7/0413: MIMO systems
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Techniques are provided to control the activation of resource sets via medium access control (MAC) signaling. In some aspect, a radio network node generates a MAC message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location (QCL) information. The radio network node then transmits the MAC message to a wireless device.

## Claims

### Claim 1

A method in a radio network node, the method comprising:
generating a medium access control (MAC) message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location (QCL) information;
transmitting the generated MAC message to a wireless device.

### Claim 2 (depends on 1)

The method of claim 1, wherein when the first field indicates that the second field is present, the third field comprises quasi co-location (QCL) information for each of the one or more resource sets identified in the second field.

### Claim 3 (depends on 1)

The method of claim 1, wherein the resource sets are measurement resource sets or reference signal resource sets.

### Claim 4 (depends on 1)

The method of claim 1, wherein the QCL information comprise one or more synchronization signal block (SSB)_indices, or one or more transmission configuration indication (TCI) indices.

### Claim 5 (depends on 1)

The method of claim 1, further comprising determining which one or more resource sets to activate among the plurality of resource sets prior to generating the MAC message.

### Claim 6

A radio network node adapted to:
generate a medium access control (MAC) message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location, (QCL) information;
transmit the generated MAC message to a wireless device.

### Claim 7 (depends on 6)

The radio network node of claim 6, wherein when the first field indicates that the second field is present, the third field comprises quasi co-location (QCL) information for each of the one or more resource sets identified in the second field.

### Claim 8 (depends on 6)

The radio network node of claim 6, wherein the resource sets are measurement resource sets or reference signal resource sets.

### Claim 9 (depends on 6)

The radio network node of claim 6, wherein the QCL information comprise one or more synchronization signal block (SSB) indices, or one or more transmission configuration indication (TCI) indices.

### Claim 10 (depends on 6)

The radio network node of claim 6, further adapted to determine which one or more resource sets to activate among the plurality of resource sets prior to generating the MAC message.

### Claim 11

A method in a wireless device, the method comprising:
receiving a medium access control (MAC) message from a radio network node;
decoding the received MAC message, the MAC message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location (QCL) information.

### Claim 12 (depends on 11)

The method of claim 11, wherein when the first field indicates that the second field is present, the third field comprises quasi co-location (QCL) information for each of the one or more resource sets identified in the second field.

### Claim 13 (depends on 11)

The method of claim 11, wherein the resource sets are measurement resource sets or reference signal resource sets.

### Claim 14 (depends on 11)

The method of claim 11, wherein the QCL information comprise one or more synchronization signal block (SSB) indices, or one or more transmission configuration indication (TCI) indices.

### Claim 15 (depends on 11)

The method of claim 11, further comprising, when the first field indicates that the second field is present, activating or deactivating the one or more resource sets identified in the second field.

### Claim 16

A wireless device adapted to:
receive a medium access control (MAC) message from a radio network node;
decode the received MAC message, the MAC message comprising a first field indicating whether a second field is present, or absent, in the MAC message, the second field identifying one or more resource sets among a plurality of resource sets which are to be activated or deactivated, and a third field comprising quasi co-location (QCL) information.

### Claim 17 (depends on 16)

The wireless device of claim 16, wherein when the first field indicates that the second field is present, the third field comprises quasi co-location (QCL) information for each of the one or more resource sets identified in the second field.

### Claim 18 (depends on 16)

The wireless device of claim 16, wherein the resource sets are measurement resource sets or reference signal resource sets.

### Claim 19 (depends on 16)

The wireless device of claim 16, wherein the QCL information comprise one or more synchronization signal block (SSB) indices, or one or more transmission configuration indication (TCI) indices.

### Claim 20 (depends on 16)

The wireless device of claim 16, further adapted to, when the first field indicates that the second field is present, activate or deactivate the one or more resource sets identified in the second field.