# US 10,485,017 B2 · Device and method of handling a schedule request

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- Number: US 10,485,017 B2
- Document ID: US10485017B2
- Status: Granted
- Kind: B2
- Application number: 15/990,844
- Filed: 2018-05-29
- Published: 2018-12-06
- Granted: 2019-11-19
- Earliest claimed: 2017-05-30
- Assignees: HTC Corporation
- Applicants: HTC Corporation
- Inventors: Shiang-Rung Ye; Chih-Hsiang Wu
- Web page: https://patentgrep.com/patent/US10485017B2

## CPC

- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A communication device of handling a schedule request (SR) comprises a storage device and a processing circuit, coupled to the storage device. The storage device stores, and the processing circuit is configured to execute instructions of: receiving a first configuration of a first logical channel (LC), a second configuration of a second LC, a first SR configuration corresponding to the first LC, and a second SR configuration corresponding to the second LC from a base station (BS); transmitting a first buffer status report (BSR); starting a BSR retransmission timer (retxBSR-Timer) in response to the transmission of the first BSR; transmitting a SR to the BS according to the first SR configuration, when the retxBSR-Timer expires, the first LC has first data available for being transmitted, and a first priority of the first LC is higher than a second priority of the second LC.

## Claims

### Claim 1

A communication device of handling a schedule request (SR), comprising:
a storage device; and
a processing circuit, coupled to the storage device, wherein the storage device stores, and the processing circuit is configured to execute instructions of:
receiving a first configuration of a first logical channel (LC), a second configuration of a second LC, a first SR configuration corresponding to the first LC, and a second SR configuration corresponding to the second LC from a base station (BS);
transmitting a first buffer status report (BSR);
starting a BSR retransmission timer (RetxBSR-Timer) in response to the transmission of the first BSR; and
transmitting a SR to the BS according to the first SR configuration, when the RetxBSR-Timer expires, the first LC has data available for being transmitted, and a first priority of the first LC is higher than a second priority of the second LC.

### Claim 2 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
transmitting the SR to the BS according to at least one uplink (UL) radio resource configured by the first SR configuration or the second SR configuration, if the communication device uses the first SR configuration or the second SR configuration.

### Claim 3 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
transmitting the SR to the BS according to the second SR configuration, when the RetxBSR-Timer expires, the second LC has data available for being transmitted and the first LC does not have the data available for being transmitted.

### Claim 4 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
determining a number of transmissions of the SR according to a counter, wherein the counter comprises a SR COUNTER.

### Claim 5 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
not transmitting the SR to the BS, when the retxBSR-Timer expires, the first LC does not have the data available for being transmitted and the second LC does not have the data available for being transmitted.

### Claim 6 (depends on 1)

The communication device of claim 1, wherein a first transmission time interval (TTI) is configured by the first SR configuration and a second TTI is configured by the second SR configuration, and the first TTI and the second TTI are after a time instant that the communication device determines to transmit the SR to the BS according to the first SR configuration.

### Claim 7 (depends on 6)

The communication device of claim 6, wherein the first TTI is later than the second TTI, and the instructions further comprise:
transmitting the SR to the BS in the first TTI according to the first SR configuration.

### Claim 8 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
starting a first SR prohibit timer in response to the transmission of the SR.

### Claim 9 (depends on 1)

The communication device of claim 1, wherein the instructions further comprise:
receiving a UL grant transmitted by the BS in response to the transmission of the SR; and
transmitting the first BSR to the BS in at least one UL radio resource configured by the UL grant.