Magnetic field communication method for managing node with low power consumption

• US 8,488,503 B2
• Filed: 05/28/2010
• Issued: 07/16/2013
• Est. Priority Date: 03/31/2010
• Status: Active Grant

• Current Assignee: Hyundai Mobis Co., Ltd., Samsung Electronics Co. Ltd.
• Original Assignee: Korea Electronics Technology Institute (Government of South Korea)
• Inventors: Won, Yun-Jae, Lim, Seung-Ok, Kim, Sun-Hee, Hwang, Kyu-Sung
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US12/790,138
• Publication Number:
  US 20110243267A1
• Time in Patent Office: 1,145 Days
• Field of Search: 370/311, 370/338, 370/349, 370/350, 370/509, 370/514, 375/269, 375/279, 375/362, 455/68, 455/343.2, 455/507
• US Class Current: 370/311
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04L 12/44 Star or tree networks
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A magnetic field communication method is provided for managing node with low power consumption which enhances performance and efficiency of a magnetic field area network in the low frequency region. The magnetic field communication method for managing node with low power consumption of the present invention is accomplished in a low-frequency wireless network that is comprised of a MFAN-C and at least one MFAN-N wherein a physical layer is comprised of a preamble, a header, and a payload, and the preamble is comprised of a wake-up sequence and a synchronization sequence. The wake-up sequence is only added to the preamble of the frame that is transmitted from the MFAN-C when the MFAN-N is being activated from the hibernation mode. The wake-up sequence is modulated using ASK modulation, and the synchronization sequence is modulated using BPSK modulation.

Claims

1. A magnetic field communication method, the method comprising:

providing a network comprising a magnetic field area network coordinator (MFAN-C) and at least one magnetic field area network node (MFAN-N); and

transmitting a plurality of data frames used to manage the at least one MFAN-N from the MFAN-C to the at least one MFAN-N,

wherein at least one of the plurality of data frames comprises a preamble, a header and a payload,

wherein the preamble comprises a wake-up sequence and a synchronization sequence, and

wherein the wake-up sequence, which changes a status of the at least one MFAN-N from a hibernation status to an activation status, is included only in the preamble of the at least one data frame transmitted from the MFAN-C.

2. The magnetic field communication method of claim 1, wherein the wake-up sequence is modulated using amplitude shift keying (ASK) modulation, and the synchronization sequence is modulated using binary phase shift keying (BPSK) modulation.

3. The magnetic field communication method of claim 1, wherein the wake-up sequence is included only in the at least one data frame transmitted from the MFAN-C to the at least one MFAN-N to place the at least one MFAN-N on an activation status, and

wherein the at least one MFAN-N is not placed on the activation status by detecting a signal transmitted from another MFAN-N to the MFAN-C.

4. A non-transitory computer-readable recording medium having recorded thereon a program for executing a magnetic field communication method, the method comprising:

providing a network comprising a magnetic field area network coordinator (MFAN-C) and at least one magnetic field area network node (MFAN-N); and

transmitting a plurality of data frames used to manage the at least one MFAN-N from the MFAN-C to the at least one MFAN-N,

wherein at least one of the plurality of data frames comprises a preamble, a header and a payload,

wherein the preamble comprises a wake-up sequence and a synchronization sequence, and

wherein the wake-up sequence, which changes a status of the at least one MFAN-N from a hibernation status to an activation status, is included only in the preamble of the at least one data frame transmitted from the MFAN-C.

5. The non-transitory computer-readable recording medium of claim 4, wherein the wake-up sequence, which changes a status of the at least one MFAN-N from a hibernation status to an activation status, is included only in the preamble of the at least one data frame transmitted from the MFAN-C, and

wherein the wake-up sequence is modulated using amplitude shift keying (ASK) modulation, and the synchronization sequence is modulated using binary phase shift keying (BPSK) modulation.