Abstract
Abstract Wireless capsule endoscopy is a new kind of medical device, which monitors the gastrointestinal tract of the human body. It can be envisaged that in the future more than one capsule could be ingested by the patient and they operate collaboratively in the gastrointestinal (GI) tract to perform certain diagnostic and therapeutic tasks. These mobile capsules and the coordinator node, which is attached to the abdomen of the patient, form a wireless network. The capsule devices are typically powered by batteries, therefore, energy efficient medium access control (MAC) protocols for multiple capsule networks are necessary. This article proposes a novel energy efficient MAC protocol for multiple capsule networks based on time division multiple access (TDMA). An asymmetric up/down link network architecture is introduced. A novel TDMA slot assignment scheme is proposed and simulation results using Qualnet show that the proposed MAC protocol achieves lower energy consumption than B-MAC and star topology TDMA.
Highlights
Wireless capsule endoscopy (WCE) is a new kind of medical device, which is ingested by the patient for the purpose of inspecting the gastrointestinal (GI) tract
These capsules and the data recorder, which is externally attached to the abdomen, form a wireless network that can be viewed as a subset of body sensor networks (BSN)
This article proposes a novel energy efficient medium access control (MAC) protocol for multiple capsule networks based on time division multiple access (TDMA)
Summary
Wireless capsule endoscopy (WCE) is a new kind of medical device, which is ingested by the patient for the purpose of inspecting the gastrointestinal (GI) tract. It could be imagined that several capsules co-operate in the GI tract to monitor the vital body signs or to perform a common task [2] These capsules and the data recorder (coordinator node), which is externally attached to the abdomen, form a wireless network that can be viewed as a subset of body sensor networks (BSN). This article proposes a novel energy efficient MAC protocol for multiple capsule networks based on time division multiple access (TDMA). For the downlink data transmissions, the coordinator node sends data directly to each sensor device, while for the uplink communications, data are sent via multi-hop mode to the coordinator node In this way, the power consumption can be. Marinkovic et al [9] proposed an energy efficient low duty cycle MAC protocol It adopts the TDMA-based strategy and star topology.
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