Abstract
The Internet of Things (IoT), which is expected to support a massive number of devices, is a promising communication scenario. Usually, the data of different devices has different reliability requirements. Channel codes with the unequal error protection (UEP) property are rather appealing for such applications. Due to the power-constrained characteristic of the IoT services, most of the data has short packets; therefore, channel codes are of short lengths. Consequently, how to transmit such nonuniform data from multisources efficiently and reliably becomes an issue be solved urgently. To address this issue, in this paper, a distributed coding scheme based on polar codes which can provide UEP property is proposed. The distributed polar codes are realized by the groundbreaking combination method of noisy coded bits. With the proposed coding scheme, the various data from multisources can be recovered with a single common decoder. Various reliability can be achieved; thus, UEP is provided. Finally, the simulation results show that the proposed coding scheme is viable.
Highlights
In recent years, polar codes have attracted much attention, since they are the first kind of provably capacityapproaching error-correction codes of any given binaryinput discrete memoryless channels (B-DMCs) [1]
It can be seen that the proposed coding scheme has shown evident Unequal error protection (UEP) property
A distributed coding scheme based on polar codes which can provide UEP property is proposed to support the varied data transmission in the Internet of Things (IoT) scenarios
Summary
Polar codes have attracted much attention, since they are the first kind of provably capacityapproaching error-correction codes of any given binaryinput discrete memoryless channels (B-DMCs) [1]. There are a massive number of devices in the IoT networks. Most of the data transmitted over the IoT networks are with short-packets. How to transmit these data with high efficiency and reliability becomes an issue worth studying [3]. As a large number of devices need to be connected with the network and transmit the data of these devices, the IoT paradigm has the opportunity to become reality [4]. The growing number of IoT devices leads to different requirements for data reliability among different devices. Unequal error protection (UEP) is an efficient way to transmit data in the IoT scenarios
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