This work represents the first stage of a wider research contribution that tackles the issue of multimedia traffic optimization in LTE networks. The whole approach comprises two parts: first, the analysis and design of novel communication techniques; second, the implementation and extension of the network simulation tool (ns-3) used to test and validate the proposed approaches, that is the focu...

Broadband packet access techniques will be required for the next generation mobile communications systems. Hybrid ARQ (HARQ) is one of the promising error control techniques. Recently, LDPC coding is gaining much attention. Multi-carrier code division multiple access (MC-CDMA), which uses a number of subcarriers to reduce the ISI resulting from frequency selective channels, has been attracting ...

The simultaneous wireless information and power transfer (SWIPT) relay system is one of the emerging technologies. Xiaomi Corporation Motorola Inc. recently launched indoor equipment most promising applications. To tap potential system, hybrid automatic repeat request (HARQ) introduced into SWIPT system. Firstly, time slot structure HARQ scheme based on full duplex two-way amplify forward (AF) ...

Cloud Radio Access Network is a promising mobile network architecture based on centralizing the baseband processing of many cellular base stations in BBU (BaseBand Unit) pool. Such has advantages. However, computing resources are shared among connected to It challenging schedule users’ data, especially overloaded pools, while respecting time constraints imposed by Hybrid Automatic Repeat Reques...

Power-line communication (PLC) is a promising technology of constructing IoT (internet things) systems, and it employs IEEE 1901 as its medium access control (MAC) protocol. Current studies about MAC performance analysis do not consider the influence physical layer's retransmission protocols, i.e., ARQ (automatic repeat request) HARQ-CC (hybrid with chase combining). Moreover, how protocol affe...

The mechanisms of adaptive modulation and coding (AMC) and hybrid automatic repeat request (HARQ) are two important schemes in modern wireless communication systems. In practical system design, the AMC mechanism is usually implemented with fixed switching thresholds for the modulation and coding schemes (MCS), and suffers from performance degradation. To mitigate this problem, a novel algorithm...

In this paper, bandwidth ef£cient Type-I and Type-II hybridARQ (HARQ) schemes using turbo trellis coded modulation (TTCM) are proposed. These schemes combine the power ef£ciency of turbo codes with the bandwidth ef£ciency of trellis coded modulation (TCM) to create an effective hybrid FEC/ARQ system. Several packet combining schemes are presented for use in conjunction with iterative turbo deco...

Recently, a lot of research on a Brain Computer Interface (BCI) which enables patients like those with Amyotrophic Lateral Sclerosis to control some equipment or to communicate with other people has been reported. One of the problems in BCI research is a trade-off between the speed and the accuracy. In the field of data transmission, on the other hand, Reliability-Based Hybrid ARQ (RB-HARQ) has...