Discontinuous Reception in a Wireless Communication System

Patent metadata

Field	Value
Publication number	US-2022022136-A1
Application number	US-201917293612-A
Country	US
Kind code	A1
Filing date	Nov 12, 2019
Priority date	Nov 13, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

A wireless device ( 14 ) is configured for use in a wireless communication system ( 10 ). The wireless device ( 14 ) configures a number of parallel hybrid automatic repeat request, HARQ, processes ( 18 ) as being available for use. The wireless device ( 14 ) discontinuously monitors a downlink control channel ( 20 ), including monitoring the downlink control channel ( 20 ) during an active time ( 24 ) that is based on how many of the configured number of parallel HARQ processes ( 18 ) are used.

First claim

1 .- 31 . (canceled)

32 . A method performed by a wireless device configured for use in a wireless communication system, the method comprising:
configuring a number of parallel hybrid automatic repeat request (HARQ) processes as being available for use; and discontinuously monitoring a downlink control channel, including monitoring the downlink control channel during an active time that is based on how many of the configured number of parallel HARQ processes are used.

33 . The method of claim 32 , wherein the active time includes times while one or more timers are running, and wherein the method further comprises controlling at least one of the one or more timers based on how many of the configured number of parallel HARQ processes are being used.

34 . The method of claim 33 , wherein the at least one of the one or more timers includes a discontinuous reception (DRX) inactivity timer.

35 . The method of claim 33 , wherein said controlling comprises stopping, or refraining from starting, the at least one of the one or more timers, responsive to a last available one of the configured number of parallel HARQ processes being put into use.

36 . The method of claim 33 , wherein said controlling comprises:
responsive to a last available one of the configured number of parallel HARQ processes being put into use, starting a HARQ stall timer; and while the HARQ stall timer is running, controlling the at least one of the one or more timers to not be running; and responsive to expiration of the HARQ stall timer, starting or re-starting the at least one of the one or more timers.

37 . The method of claim 32 , further comprising:
responsive to a last available one of the configured number of parallel HARQ processes being put into use, starting a HARQ stall timer; and monitoring the downlink control channel responsive to expiration of the HARQ stall timer.

38 . The method of claim 37 , wherein the HARQ stall timer is started with a value that is a function of:
a time elapsed between when a first available one of the configured number of parallel HARQ processes was put into use and when the last available one of the configured number of parallel HARQ processes is put into use; and a round-trip time or round-trip delay in the wireless communication system.

39 . The method of claim 32 , wherein the active time is based on whether all of the configured number of parallel HARQ processes are used.

40 . The method of claim 32 , wherein the wireless communication system is a non-terrestrial wireless communication system.

41 . A method performed by a network node configured for use in a wireless communication system, the method comprising:
transmitting, to a wireless device, control signaling that configures the wireless device to discontinuously monitor a downlink control channel by monitoring the downlink control channel during an active time that is based on how many of a number of configured parallel hybrid automatic repeat request (HARQ) processes are used.

42 . The method of claim 41 , wherein the active time includes times while one or more timers at the wireless device are running, wherein the control signaling configures the wireless device to control at least one of the one or more timers based on how many of the configured number of parallel HARQ processes are being used.

43 . The method of claim 42 , wherein the at least one of the one or more timers includes a discontinuous reception (DRX) inactivity timer.

44 . The method of claim 41 , wherein the active time is based on whether all of the configured number of parallel HARQ processes are used.

45 . A wireless device configured for use in a wireless communication system, the wireless device comprising:
communication circuitry; and processing circuitry configured to:
configure a number of parallel hybrid automatic repeat request (HARQ) processes as being available for use; and
discontinuously monitor a downlink control channel, including monitoring the downlink control channel during an active time that is based on how many of the configured number of parallel HARQ processes are used.

46 . The wireless device of claim 45 , wherein the active time includes times while one or more timers are running, and wherein the processing circuitry is configured to control at least one of the one or more timers based on how many of the configured number of parallel HARQ processes are being used.

47 . The wireless device of claim 46 , wherein the at least one of the one or more timers includes a discontinuous reception (DRX) inactivity timer.

48 . The wireless device of claim 46 , wherein the processing circuitry is configured to control the at least one of the one or more timers by stopping, or refraining from starting, the at least one of the one or more timers, responsive to a last available one of the configured number of parallel HARQ processes being put into use.

49 . The wireless device of claim 46 , wherein the processing circuitry is configured to control the at least one of the one or more timers by:
responsive to a last available one of the configured number of parallel HARQ processes being put into use, starting a HARQ stall timer; and while the HARQ stall timer is running, controlling the at least one of the one or more timers to not be running; and responsive to expiration of the HARQ stall timer, starting or re-starting the at least one of the one or more timers.

50 . The wireless device of claim 45 , wherein the processing circuitry is further configured to:
responsive to a last available one of the configured number of parallel HARQ processes being put into use, start a HARQ stall timer; and monitor the downlink control channel responsive to expiration of the HARQ stall timer.

51 . The wireless device of claim 50 , wherein the HARQ stall timer is started with a value that is a function of:
a time elapsed between when a first available one of the configured number of parallel HARQ processes was put into use and when the last available one of the configured number of parallel HARQ processes is put into use; and a round-trip time or round-trip delay in the wireless communication system.

52 . The wireless device of claim 45 , wherein the active time is based on whether all of the configured number of parallel HARQ processes are used.

53 . The wireless device of claim 45 , wherein the wireless communication system is a non-terrestrial wireless communication system.

54 . A network node configured for use in a wireless communication system, the network node comprising:
communication circuitry; and processing circuitry configured to transmit, to a wireless device, control signaling that configures the wireless device to discontinuously monitor a downlink control channel by monitoring the downlink control channel during an active time that is based on how many of a number of configured parallel hybrid automatic repeat request (HARQ) processes are used.

55 . The network node of claim 54 , wherein the active time includes times while one or more timers at the wireless device are running, wherein the control signaling configures the wireless device to control at least one of the one or more timers based on how many of the configured number of parallel HARQ processes are being used.

56 . The network node of claim 55 , wherein the at least one of the one or more timers includes a discontinuous reception (D

Assignees

• Ericsson Telefon Ab L M

Inventors

• Hofström Björn
• Määttänen Helka-Liina

Classifications

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W52/0232 Primary

  according to average transmission signal activity · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• Y02D30/70

  in wireless communication networks · CPC title