公开(公告)号：US20240365378A1

公开(公告)日：2024-10-31

申请号：US18309689

申请日：2023-04-28

Applicant: Honeywell International Inc.

Inventor： Udaya Shetty ,  Prasad Samudrala ,  Mithun Mathew ,  Yuvaraj Nagendran

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: A hybrid slotted time division multiple access (TDMA) and carrier sense multiple access (CSMA) based networks that optimize radio frequency (RF) based network resources, RF infrastructure, and improve network performance in a building which may include time critical sensors, such as smoke sensors, and non-critical sensors. The present system may classify critical sensors as guaranteed sensors which get TDMA slots assigned by a network manager. The non-critical sensors may operate in non-guaranteed CSMA slots but within a predefined latency interval. The present system may provide for both types of sensors to co-exist in tandem within the same wireless network.

公开(公告)号：US20240388389A1

公开(公告)日：2024-11-21

申请号：US18318291

申请日：2023-05-16

Applicant: Honeywell International Inc.

Inventor： Udaya Shetty ,  Prasad Samudrala ,  Mithun Mathew ,  Amit Kulkarni ,  Yuvaraj Nagendran

IPC: H04L5/00

Abstract: An approach talking about orthogonal frequency hopping patterns definition and a unique way of defining hopping patterns for a time division multiple access (TDMA) wireless sensor networks doing frequency hopping. A frequency hopping pattern may cover virtually any frequency usage for each sensor and handle interference in wireless medium reliably. One may define various orthogonal hopping patterns which are non-interfered between multiple sensor networks present in the same vicinity. One may use TDMA networks for frequency hopping. To make the communication of multiple FTDMA wireless networks work concurrently without much packet collision with greater than 99 percent reliability, one may devise a unique way of generating a frequency hopping pattern (FHP) scheme in various licensed and license free frequency bands. An FHP may be a sequence of n frequencies which is followed by the whole wireless mesh, and the sequence keeps repeating after the nth time slot.