IP Library › Granted Patent US 11,019,676
Granted Patent B2
US 11,019,676 · App. 16/338,393 · Granted May 25, 2021

Active time handling with 2-step granting

Inventors: Mattias Bergström (Sollentuna, SE); Riikka Susitaival (Helsinki, FI)
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
H04W76/28H04W72/042H04W72/1284H04W72/14H04W76/27
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Quick Facts
Patent No.
US 11,019,676
App. No.
16/338,393
Granted
May 25, 2021
Kind
B2
Abstract

A wireless communications device, operating according to a DRX configuration and configured to receive two-step grants for uplink transmissions, determines whether the device has received a first trigger of a two-step grant. The device enters a state in which the device listens on a physical downlink control channel for messages from the network, in response to determining that the device has received the first trigger, without necessarily receiving the second trigger.

Claims (42)

1. A method performed by a wireless communications device operating according to a Discontinuous Reception (DRX) configuration and configured to receive, from a wireless communications network, two-step grants for scheduling uplink transmissions using a first physical downlink control channel, PDCCH, transmission that indicates a first trigger, which has an associated second trigger that is transmitted in a second PDCCH transmission such that a combination of the first and second PDCCH transmissions grants that the device can perform an uplink transmission, the method comprising:

determining whether the device has received a first trigger of a two-step grant; and

in response to determining that the device has received the first trigger, entering a state in which the device listens on a physical downlink control channel for messages from the network, wherein entering the state comprises waiting a predetermined period of time after receiving the first trigger before entering the state.

2. The method according to claim 1 , further comprising:

determining whether the first trigger became invalid; and

in response to determining that the first trigger became invalid, exiting the state.

3. The method according to claim 1 , further comprising:

starting a timer in response to receiving the first trigger; and

exiting the state only upon expiration of the timer.

4. The method according to claim 3 , wherein a duration of the timer is received with the first trigger.

5. The method according to claim 1 , further comprising:

determining whether the first trigger became invalid;

in response to determining that the first trigger became invalid, starting a timer; and

exiting the state only upon expiration of the timer.

6. The method according to claim 3 , wherein a duration of the timer is received in Radio Resource Control (RRC) signaling.

7. The method according to claim 3 , further comprising stopping the timer in response to receiving a second trigger of the two-step grant.

8. The method according to of claim 7 , wherein a time in which the device is in the state includes a transmission timing interval (TTI) in which the second trigger was received.

9. The method according to claim 3 , wherein exiting the state only upon expiration of the timer comprises exiting the state before a second trigger of the two-step grant has been received.

10. The method according to claim 1 , further comprising:

determining whether the device has received a second trigger of the two-step grant; and

in response to determining that the device has received the second trigger, exiting the state.

11. The method according to claim 1 , further comprising:

determining whether the device has received a second trigger of the two-step grant;

in response to determining that the device has received the second trigger, determining whether a particular timer is running; and

in response to determining that the timer is running, exiting the state only after expiration of the timer.

12. The method according to claim 1 , further comprising:

receiving a second trigger of the two-step grant; and

exiting the state in response to transmitting an uplink transmission triggered by the second trigger.

13. The method according to of claim 1 , wherein a time in which the device is in the state includes a transmission timing interval (TTI) in which the first trigger was received.

14. A wireless communications device configured to operate according to a Discontinuous Reception (DRX) configuration and configured to receive, from a wireless communications network, two-step grants for scheduling uplink transmissions using a first physical downlink control channel, PDCCH, transmission that indicates a first trigger, which has an associated second trigger that is transmitted in a second PDCCH transmission such that a combination of the first and second PDCCH transmissions grants that the device can perform an uplink transmission, the device comprising:

transceiver circuitry configured for communication with the network; and

processing circuitry operatively associated with the transceiver circuitry and configured to:

determine whether the device has received a first trigger of a two-step grant; and

cause the device to enter a state in which the device listens on a physical downlink control channel for messages from the network, in response to determining that the device has received the first trigger, wherein entering the state comprises waiting a predetermined period of time after receiving the first trigger before entering the state.

15. A network node of a wireless communications network, wherein the network node is configured to provide, to a wireless communications device operating according to a Discontinuous Reception (DRX) configuration, two-step grants for scheduling uplink transmissions using a first physical downlink control channel, PDCCH, transmission that indicates a first trigger, which has an associated second trigger that is transmitted in a second PDCCH transmission such that a combination of the first and second PDCCH transmissions grants that the device can perform an uplink transmission, the network node comprising:

transceiver circuitry configured for communication with the wireless communications device; and

processing circuitry operatively associated with the transceiver circuitry and configured to:

transmit, via the transceiver circuitry, a first trigger of a two-step grant;

transmit a duration of a timer to be started by the wireless communications device, wherein the device exits the state only upon expiration of the timer; and

prior to transmitting a second trigger of the two-step grant, transmit physical downlink control channel messages to the device to be received during a state in which the device listens on a physical downlink control channel for messages from the network.

16. The network node according to claim 15 , wherein the processing circuitry is configured to transmit the second trigger via the transceiver circuitry.

17. The network node according to claim 15 , wherein the processing circuitry is configured to determine whether the device is configured to enter the state before receiving the second trigger.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 29, 2019
From: SUSITAIVAL, RIIKKA
To: OY L M ERICSSON AB
Reel/Frame 048745/0810 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 29, 2019
From: OY L M ERICSSON AB
To: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
Reel/Frame 048745/0831 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 29, 2019
From: BERGSTRÖM, MATTIAS
To: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Reel/Frame 048745/0867 →
Continuity (2)
Provisional Application 62401222 · Sep 29, 2016
Related Publication 20200029385A1 · Jan 23, 2020
Cited By (1)
US 12,279,254