# US 12,114,291 B2 · Virtual resource block to physical resource block mapping in new radio

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- Number: US 12,114,291 B2
- Document ID: US12114291B2
- Status: Granted
- Kind: B2
- Application number: 16/184,771
- Filed: 2018-11-08
- Published: 2019-05-16
- Granted: 2024-10-08
- Earliest claimed: 2017-11-10
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Wooseok Nam; Tao Luo; Jing Sun; Alexandros Manolakos; Wanshi Chen; Heechoon Lee; Juan Montojo; Peter Gaal
- Web page: https://patentgrep.com/patent/US12114291B2

## CPC

- H04W 72/04: Wireless resource allocation
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 88/02: Terminal devices
- H04W 88/08: Access point devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Certain aspects of the present disclosure relate to methods and apparatus mapping virtual resource blocks (VRBs) to physical resource blocks (PRBs) and using the mapping in wireless communications, for example, in new radio (NR) technologies. An exemplary method includes determining a first interleaved mapping that maps a first interleaving unit of N consecutive first virtual resource blocks (VRBs) to N consecutive first physical resource blocks (PRBs), wherein each first PRB comprises a set of frequency resources during a period, transmitting a first grant allocating the first interleaving unit of first VRBs to a first user equipment (UE), and communicating with the first UE via the first PRBs mapped to the first VRBs of the first interleaving unit.

## Claims

### Claim 1

A method for wireless communications performed by a base station (BS), comprising:
determining a first interleaved mapping that maps a first interleaving unit of N consecutive first virtual resource blocks (VRBs) to N consecutive first physical resource blocks (PRBs), wherein N is greater than one, wherein each first PRB comprises a plurality of resource elements, wherein the first interleaved mapping maps each interleaving unit of a plurality of interleaving units to a corresponding PRB bundle of a plurality of PRB bundles, wherein each PRB bundle of the plurality of PRB bundles has N PRBs, and wherein indices of the N consecutive first VRBs are different from indices of the N consecutive first PRBs;
transmitting a first grant allocating the first interleaving unit of N consecutive first VRBs to a first user equipment (UE), wherein the first grant allocates the plurality of the interleaving units; and
communicating with the first UE via the N consecutive first PRBs mapped to the N consecutive first VRBs of the first interleaving unit.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
transmitting an indication of the first interleaved mapping to the UE.

### Claim 3 (depends on 2)

The method of claim 2, wherein transmitting the indication comprises:
sending a first radio resource control (RRC) configuration comprising the indication of the first interleaved mapping to the UE.

### Claim 4 (depends on 3)

The method of claim 3, further comprising:
sending a second RRC configuration indicating a change of the first interleaved mapping to the UE.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first interleaved mapping is specific to a first bandwidth part (BWP), and the method further comprises:
determining a second interleaved mapping specific to the first BWP that maps a second interleaving unit of M consecutive second VRBs to M consecutive second PRBs, wherein M is greater than 1;
transmitting a second grant allocating the second interleaving unit of M consecutive second VRBs to a second UE; and
communicating with the second UE via the M consecutive second PRBs mapped to the M consecutive second VRBs of the second interleaving unit.

### Claim 6 (depends on 5)

The method of claim 5, wherein M is not equal to N.

### Claim 7 (depends on 1)

The method of claim 1, wherein each PRB bundle includes the N consecutive first PRBs and upper and lower boundaries of the PRB bundle differ from boundaries of PRB bundles of a carrier-specific PRB bundle grid.

### Claim 8 (depends on 1)

The method of claim 1, further comprising semi-statically configuring VRBs of one or more of the first interleaving units as null-RBs.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
reserving one or more PRBs for small RB allocations; and
designating at least one interleaving unit corresponding to the reserved PRBs as null-RBs.

### Claim 10 (depends on 1)

The method of claim 1, wherein one or more frequency resources are reserved and communicating with the first UE comprises:
determining reserved portions of the N consecutive first VRBs corresponding to the reserved frequency resources;
rate-matching data to the N consecutive first VRBs excluding the reserved portions; and
transmitting the data via the N consecutive first PRBs.

### Claim 11 (depends on 1)

The method of claim 1, wherein one or more frequency resources are reserved and communicating with the first UE comprises:
signaling an indication of the reserved frequency resources to the UE.

### Claim 12

A method for wireless communications performed by a user equipment (UE), comprising:
determining an interleaved mapping that maps an interleaving unit of N consecutive virtual resource blocks (VRBs) to N consecutive physical resource blocks (PRBs), wherein N is greater than one, wherein each PRB comprises a plurality of resource elements, wherein the interleaved mapping maps each interleaving unit of a plurality of interleaving units to a corresponding PRB bundle of a plurality of PRB bundles, wherein each PRB bundle of the plurality of PRB bundles has N PRBs, and wherein indices of the N consecutive VRBs are different from indices of the N consecutive PRBs;
receiving a grant allocating the interleaving unit of N consecutive VRBs from a base station (BS), wherein the grant allocates the plurality of the interleaving units; and
communicating with the BS via the N consecutive PRBs mapped to the N consecutive VRBs of the interleaving unit.

### Claim 13 (depends on 12)

The method of claim 12, further comprising:
receiving an indication of the interleaved mapping from the BS.

### Claim 14 (depends on 13)

The method of claim 13, wherein receiving the indication comprises:
receiving a first radio resource control (RRC) configuration comprising the indication of the interleaved mapping from the BS.

### Claim 15 (depends on 14)

The method of claim 14, further comprising:
receiving a second RRC configuration indicating a change of the interleaved mapping from the BS.

### Claim 16 (depends on 12)

The method of claim 12, wherein each PRB bundle includes the N consecutive PRBs and upper and lower boundaries of the PRB bundle differ from boundaries of PRB bundle of a carrier-specific PRB bundle grid.

### Claim 17 (depends on 12)

The method of claim 12, further comprising
receiving a semi-static configuration indicating VRBs of one or more of the interleaving units as null-RBs.

### Claim 18 (depends on 12)

The method of claim 12, further comprising:
receiving an indication designating one or more PRBs as null-RBs;
receiving a small RB allocation of one or more of the null-RBs; and
communicating with the BS according to the small RB allocation.

### Claim 19 (depends on 12)

The method of claim 12, wherein communicating with the BS comprises:
receiving an indication that one or more frequency resources are reserved frequency resources;
determining reserved portions of the VRBs corresponding to the reserved frequency resources;
rate-matching data to the VRBs excluding the reserved portions; and
transmitting the data via the PRBs.

### Claim 20

An apparatus for wireless communications, comprising:
a processor configured to:
determine an interleaved mapping that maps an interleaving unit of N consecutive virtual resource blocks (VRBs) to N consecutive physical resource blocks (PRBs), wherein N is greater than one, wherein each PRB comprises a plurality of resource elements, wherein the interleaved mapping maps each interleaving unit of a plurality of interleaving units to a corresponding PRB bundle of a plurality of PRB bundles, wherein each PRB bundle of the plurality of PRB bundles has N PRBs, and wherein indices of the N consecutive VRBs are different from indices of the N consecutive PRBs;
transmit a grant allocating the interleaving unit of N consecutive VRBs to a user equipment (UE), wherein the grant allocates the plurality of the interleaving units; and
communicate with the UE via the N consecutive PRBs mapped to the N consecutive VRBs of the interleaving unit; and
a memory coupled with the processor.

### Claim 21

An apparatus for wireless communications, comprising:
a processor configured to:
determine an interleaved mapping that maps an interleaving unit of N consecutive virtual resource blocks (VRBs) to N consecutive physical resource blocks (PRBs), wherein N is greater than one, wherein each PRB comprises a plurality of resource elements, wherein the interleaved mapping maps each interleaving unit of a plurality of interleaving units to a corresponding PRB bundle of a plurality of PRB bundles, wherein each PRB bundle of the plurality of PRB bundles has N PRBs, and wherein indices of the N consecutive VRBs are different from indices of the N consecutive PRBs;
receive a grant allocating the interleaving unit of N consecutive VRBs from a base station (BS), wherein the grant allocates the plurality of the interleaving units; and
communicate with the BS via the N consecutive PRBs mapped to the N consecutive VRBs of the interleaving unit; and
a memory coupled with the processor.