{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9832811","patent":{"patent_number":"US-9832811","title":"Adaptive physical layer warm-up for LTE TDD C-DRX power optimization","assignee":null,"inventors":[],"filing_date":"2016-03-28T00:00:00.000Z","publication_date":"2017-11-28T00:00:00.000Z","cpc_codes":["H04B","H04W","H04W","H04W","H04W","H04L","H04L","H04W"],"num_claims":20,"abstract":"Methods and apparatus to reduce power consumption in user equipment (UE) that operates in a connected discontinuous reception (C-DRX) mode while in communication with wireless network are disclosed. A C-DRX warm-up period before the UE enters an on-duration is adjusted dynamically based on one or more factors including a time division duplex (TDD) uplink/downlink (UL/DL) subframe configuration, signal-to-noise ratio (SNR) values, and Doppler shift values. The C-DRX warm-up period is adapted based on the pattern of DL subframes in the UL/DL subframe configuration by including DL subframes that best contribute to channel estimation and adaptive tracking loops based on measured SNR and Doppler shift conditions. Favorable channel conditions, such as higher SNR and lower Doppler shift, can require fewer DL subframes and consequently shorter C-DRX warm-up periods. Higher Doppler shift values indicate more rapidly varying channel conditions and require DL subframes positioned closer to the start of the on-duration."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Adaptive physical layer warm-up for LTE TDD C-DRX power optimization","description":"Methods and apparatus to reduce power consumption in user equipment (UE) that operates in a connected discontinuous reception (C-DRX) mode while in communication with wireless network are disclosed. A","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9832811","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9832811","citation_suggestion":"Patentable. \"Adaptive physical layer warm-up for LTE TDD C-DRX power optimization\" (US-9832811). https://patentable.app/patents/US-9832811","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9832811","json":"https://patentable.app/api/llm-context/US-9832811","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:40:32.285Z"}