# US 12,004,149 B2 · Communication system

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- Number: US 12,004,149 B2
- Document ID: US12004149B2
- Status: Granted
- Kind: B2
- Application number: 16/636,977
- Filed: 2018-08-07
- Published: 2020-08-13
- Granted: 2024-06-04
- Earliest claimed: 2017-08-10
- Assignees: NEC Corporation
- Applicants: NEC Corporation
- Inventors: Yassin Aden Awad; Ayesha Ijaz; Robert Arnott
- Web page: https://patentgrep.com/patent/US12004149B2

## CPC

- H04W 72/1268: of uplink data flows
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 76/27: Transitions between radio resource control [RRC] states
- 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

A communication system is disclosed in which a communication device transmits, to a base station and using communication resources that may be used for grant-free uplink communications, uplink data and information from which the communication device can be identified, wherein the information from which the communication device can be identified comprises a Cyclic Redundancy Check (CRC) value that is encoded with identity information identifying the communication device (for example, a C-RNTI of the communication device).

## Claims

### Claim 1

A user equipment (UE) comprising: at least one memory storing instructions; and
at least one processor configured lo process the instructions to:
receive, from a base station, a Radio Resource Control (RRC) message including at least one parameter for transmitting uplink data without a dynamic grant;
configure:
i) a first radio network temporary identifier (RNTI) for uplink data transmitted without the scheduling grant; and
ii) a second RNTI for uplink data transmitted with the scheduling grant;
determine a Hybrid Automatic Repeat Request (HARQ) process identifier corresponding to a transmission without a dynamic grant based on a resource in a predetermined radio frame and the at least one parameter, in a case where the transmission without a dynamic grant is available based on a timing of the transmission without a dynamic grant and a timing of a transmission with a dynamic grant;
transmit the uplink data to the base station, via the transmissions without a dynamic grant;
retransmit, to the base station, the uplink data using a resource scheduled by an uplink grant in downlink control information corresponding to the first RNTI; and
transmit and retransmit, to the base station, another uplink data using a resource scheduled by an uplink grant in downlink control information corresponding to the second RNTI.

### Claim 2 (depends on 1)

The UE according to claim 1, wherein the transmission without a dynamic grant is linked to a HARQ process corresponding to the HARQ process identifier.

### Claim 3 (depends on 1)

The UE according to claim 1, wherein the first RNTI is derived based on the RRC message.

### Claim 4

A method for a user equipment (UE), the method comprising:
receiving, from a base station, a Radio Resource Control (RRC) message including at least one parameter for transmitting uplink data without a dynamic grant;
configuring:
i) a first radio network temporary identifier (RNTI) for transmitting uplink data without a dynamic grant; and
ii) a second RNTI for transmitting uplink data with a dynamic grant;
determining a Hybrid Automatic Repeat Request (HARQ) process identifier corresponding to a transmission without a dynamic grant based on a resource in a predetermined radio frame and at least one parameter, in a case where the transmission without a dynamic grant is available based on a timing of the transmission without a dynamic grant and a timing of a transmission with a dynamic grant;
transmitting the uplink data to the base station, via the transmission without a dynamic grant;
retransmitting, to the base station, the uplink data using a resource scheduled by an uplink grant in downlink control information corresponding to the first RNTI; and
transmitting and retransmitting, to the base station, another uplink data using a resource scheduled by an uplink grant in downlink control information corresponding to the second RNTI.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the transmission without a dynamic grant is linked to a HARQ process corresponding to the HARQ process identifier.

### Claim 6 (depends on 4)

The method according to claim 4, wherein the first RNTI is derived based on the RRC message.