Multiple access scheme for narrowband channels

A technology of frequency channel and channel state information, which is applied in the communication field of machine-to-machine wireless wide area network, and can solve the problems of precious power and resource waste, data transmission delay, etc.

Inactive Publication Date: 2015-08-05
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process causes a delay in the transmission of data on the reverse link
Additionally, because M2M devices attempt to identify available channels through a basic trial-and-error process, precious power and resources of these devices are wasted

Method used

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  • Multiple access scheme for narrowband channels
  • Multiple access scheme for narrowband channels
  • Multiple access scheme for narrowband channels

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Embodiment Construction

[0039] This document describes methods for minimizing power usage by M2M devices by providing assignment of narrowband frequency division multiple access (FDMA) frequency channels for transmissions on the reverse link, and early termination of reverse link transmissions , systems and equipment. In one embodiment, the base station may transmit status indicators for each narrowband frequency channel. The status indicator indicates whether the channel is free or busy. An M2M device may select a channel with an idle state and send a request to use the channel. Upon receiving the request, the base station may transition the status indicator to busy. The base station may send updated status indicators for each channel. Upon receiving the updated status indicator and finding that the status of the requested channel has changed to busy, the requesting M2M device can know that it has been assigned the channel and can start using this channel for communication on the reverse link. S...

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Abstract

Methods, systems, and devices are described for managing wireless communications in a machine-to-machine (M2M) wireless Wide Area Network (WAN). An operating frequency band of the M2M wireless WAN is divided into at least a first frequency channel and a second frequency channel. The first and second frequency channels being used for communications on a reverse link. First channel status information and second channel status information are broadcasted to one or more M2M devices. The first channel status information indicating a status of the first frequency channel. The second channel status information indicating a status of the second frequency channel.

Description

Background technique [0001] The following relates generally to wireless communications, and more specifically to communications in machine-to-machine (M2M) wireless wide area networks (WANs). Wireless communication systems have been widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, sensor data, tracking data, and the like. These systems may be multiple-access systems that can support communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems and Orthogonal Frequency Division Multiple Access (OFDMA) systems. [0002] Generally, a wireless multiple-access communication system may include multiple base stations, each base station simultaneously supporting communication for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/00H04W74/00H04W4/70
CPCH04W72/085H04W52/0229H04W74/04H04W52/0219H04W74/006H04W52/0216H04W4/005H04W4/70Y02D30/70H04W72/542
Inventor A·K·古普塔田彬E·林
Owner QUALCOMM INC
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