# US 10,455,638 B2 · Techniques and apparatuses for configuring an extended discontinuous reception cycle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,638 B2 - Document ID: US10455638B2 - Status: Granted - Kind: B2 - Application number: 15/643,043 - Filed: 2017-07-06 - Published: 2019-01-10 - Granted: 2019-10-22 - Earliest claimed: 2017-07-06 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Vishnu Namboodiri Karakkad Kesavan Namboodiri; Chinmaya Padhy; Mukesh Kumar - Web page: https://patentgrep.com/patent/US10455638B2 ## CPC - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 60/04: using triggered events - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may configure a cycle length of an extended discontinuous reception (eDRX) cycle, and may determine whether the UE is in a condition, associated with triggering a tracking area update, during an on duration of the eDRX cycle. The UE may selectively increase or decrease the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition. The cycle length may be decreased when the UE is in the condition or may be increased when the UE is not in the condition. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: configuring a cycle length of an extended discontinuous reception (eDRX) cycle; determining whether the UE is in a condition, associated with triggering a tracking area update, during an on duration of the eDRX cycle, wherein the condition includes at least one of a mobility condition or a cell edge condition; and selectively increasing or decreasing the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 2 (depends on 1) The method of claim 1, wherein the UE performs a tracking area update procedure when the UE is in the condition. ### Claim 3 (depends on 1) The method of claim 1, further comprising: waking up periodically for a plurality of on durations of the eDRX cycle; iteratively determining whether the UE is in the condition during the plurality of on durations; and iteratively increasing, decreasing, or maintaining the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition during the plurality of on durations. ### Claim 4 (depends on 1) The method of claim 1, wherein the cycle length of the eDRX cycle is iteratively increased until the cycle length satisfies a maximum threshold. ### Claim 5 (depends on 1) The method of claim 1, wherein the cycle length of the eDRX cycle is iteratively decreased until the cycle length satisfies a minimum threshold. ### Claim 6 (depends on 1) The method of claim 1, wherein the UE is initially configured with a minimum cycle length for the eDRX cycle. ### Claim 7 (depends on 6) The method of claim 6, wherein the minimum cycle length is based at least in part on the tracking area update period. ### Claim 8 (depends on 1) The method of claim 1, wherein the UE is configured to set the cycle length to a minimum cycle length for the eDRX cycle based at least in part on determining that the UE has a high likelihood of triggering the tracking area update. ### Claim 9 (depends on 1) The method of claim 1, wherein the increased or decreased cycle length is signaled to a base station. ### Claim 10 (depends on 1) The method of claim 1, wherein the increasing or decreasing the cycle length is performed based at least in part on whether a change in energy detected by the UE in a time period satisfies a threshold. ### Claim 11 (depends on 1) The method of claim 1, wherein the increasing or decreasing the cycle length is performed based at least in part on whether a number of tracking area changes for the UE in a time period satisfies a threshold. ### Claim 12 (depends on 1) The method of claim 1, wherein the increasing or decreasing the cycle length is performed based at least in part on whether a received energy of a serving cell of the UE satisfies a threshold. ### Claim 13 (depends on 1) The method of claim 1, wherein the increasing or decreasing the cycle length is performed based at least in part on location information associated with the UE. ### Claim 14 A method of wireless communication performed by a user equipment (UE), comprising: waking up for a plurality of on durations of an extended discontinuous reception (eDRX) cycle, wherein the eDRX cycle is configured with a cycle length; periodically determining whether the UE is in a condition, associated with triggering a tracking area update, during the plurality of on durations, wherein the condition includes at least one of a mobility condition or a cell edge condition; and periodically reconfiguring the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 15 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the one or more processors configured to: configure a cycle length of an extended discontinuous reception (eDRX) cycle; determine whether the UE is in a condition, associated with triggering a tracking area update, during an on duration of the eDRX cycle, wherein the condition includes at least one of a mobility condition or a cell edge condition; and selectively increase or decrease the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 16 (depends on 15) The UE of claim 15, wherein the UE performs a tracking area update procedure when the UE is in the condition. ### Claim 17 (depends on 15) The UE of claim 15, wherein the one or more processors are further configured to: wake up periodically for a plurality of on durations of the eDRX cycle; iteratively determine whether the UE is in the condition during the plurality of on durations; and iteratively increase, decrease, or maintain the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition during the plurality of on durations. ### Claim 18 (depends on 15) The UE of claim 15, wherein the cycle length of the eDRX cycle is iteratively increased until the cycle length satisfies a maximum threshold. ### Claim 19 (depends on 15) The UE of claim 15, wherein the cycle length of the eDRX cycle is iteratively decreased until the cycle length satisfies a minimum threshold. ### Claim 20 (depends on 15) The UE of claim 15, wherein the UE is initially configured with a minimum cycle length for the eDRX cycle. ### Claim 21 (depends on 20) The UE of claim 20, wherein the minimum cycle length is based at least in part on the tracking area update period. ### Claim 22 (depends on 15) The UE of claim 15, wherein the UE is configured to set the cycle length to a minimum cycle length for the eDRX cycle based at least in part on determining that the UE has a high likelihood of triggering the tracking area update. ### Claim 23 (depends on 15) The UE of claim 15, wherein the increased or decreased cycle length is signaled to a base station. ### Claim 24 (depends on 15) The UE of claim 15, wherein the one or more processors are configured to increase or decrease the cycle length based at least in part on whether a change in energy detected by the UE in a time period satisfies a threshold. ### Claim 25 (depends on 15) The UE of claim 15, wherein the one or more processors are configured to increase or decrease the cycle length based at least in part on whether a number of tracking area changes for the UE in a time period satisfies a threshold. ### Claim 26 (depends on 15) The UE of claim 15, wherein the one or more processors are configured to increase or decrease the cycle length based at least in part on whether a received energy of a serving cell of the UE satisfies a threshold. ### Claim 27 (depends on 15) The UE of claim 15, wherein the one or more processors are configured to increase or decrease the cycle length based at least in part on location information associated with the UE. ### Claim 28 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the one or more processors configured to: wake up for a plurality of on durations of an extended discontinuous reception (eDRX) cycle, wherein the eDRX cycle is configured with a cycle length; periodically determine whether the UE is in a condition, associated with triggering a tracking area update, during the plurality of on durations, wherein the condition includes at least one of a mobility condition or a cell edge condition; and periodically reconfigure the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 29 A non-transitory computer-readable medium storing one or more instructions for wireless communication, comprising: one or more instructions that, when executed by one or more processors, cause the one or more processors to: configure a cycle length of an extended discontinuous reception (eDRX) cycle; determine whether a user equipment (UE) is in a condition, associated with triggering a tracking area update, during an on duration of the eDRX cycle, wherein the condition includes at least one of a mobility condition or a cell edge condition; and selectively increase or decrease the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 30 A non-transitory computer-readable medium storing one or more instructions for wireless communication, comprising: one or more instructions that, when executed by one or more processors, cause the one or more processors to: wake up for a plurality of on durations of an extended discontinuous reception (eDRX) cycle, wherein the eDRX cycle is configured with a cycle length; periodically determine whether a user equipment (UE) is in a condition, associated with triggering a tracking area update, during the plurality of on durations, wherein the condition includes at least one of a mobility condition or a cell edge condition; and periodically reconfigure the cycle length of the eDRX cycle based at least in part on determining whether the UE is in the condition, wherein the cycle length is decreased when the UE is in the condition or is increased when the UE is not in the condition, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is decreased based on a tracking area update period. ### Claim 31 (depends on 1) The method of claim 1, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is adjusted to align an on duration of the eDRX cycle with the tracking area update period. ### Claim 32 (depends on 15) The UE of claim 15, wherein when the cycle length is decreased when the UE is in the condition, the cycle length is adjusted to align an on duration of the eDRX cycle with the tracking area update period.