Recently, hybrid-automatic-repeat-request (HARQ) systems have been favored in particular state-of-the-art communications systems since they provide the practicality of error detections and corrections aligned with repeat-requests when needed at receivers. The queueing characteristics of these systems have taken considerable focus since the current technology demands data transmissions with a mi...

A novel service-based soft HARQ scheme for Machine Type Communication (MTC) is proposed in this paper. Conventionally, the repetition number for each HARQ retransmission is fixed. In contrast, in our soft HARQ scheme the repetition number is selected to optimize specific objective functions corresponding to diverse service demands. Based on this, three soft HARQ strategies, namely Strategies EM...

Asset price jumps are very common in financial markets, and they essential to accurately predict volatility. This article focuses on 50 randomly selected stocks from the Chinese stock market, utilising high-frequency data construct two jump models, heterogeneous autoregressive quarticity model (HARQ-J) full (HARQ-F-J), which take into account variables based existing models (HARQ HARQ-F). To fu...

In this work, we consider transmissions over block fading channels and assume that adaptive modulation and coding (AMC) and hybrid automatic repeat request (HARQ) are implemented. Knowing that in high signal-to-noise ratio, the conventional combination of HARQ with AMC is counterproductive from the throughput point of view, we adopt the so-called layer-coded HARQ (L-HARQ). L-HARQ allows consecu...

As opposed to hybrid automatic repeat request with incremental redundancy (HARQ-IR) that all the resources are occupied resend redundant information, cross-packet HARQ (XP-HARQ) allows introduction of new information into retransmissions substantially exploit remaining resources. This letter provides a profound investigation outage performance XP-HARQ. In particular, exact expression XP-HARQ is...

In order to avoid dropping the periodic CSI report frequently in case of collision between a periodic CSI report and HARQ-ACK feedback in LTE-Advanced system, this paper gives two coding schemes for multiplexing periodic CSI (Channel State Information) with HARQ-ACK (Hybrid Automatic Repeat request Acknowledgement) feedback on PUCCH (Physical Up Control Channel) format 3. The result of simulati...

This paper proposes a turbo-like decoding algorithm for network coded HARQ (NC-HARQ) retransmission scheme. Instead of retransmission erroneous packets individually, we send a network coded packet formed by XOR of two incorrectly received packets in the NC-HARQ retransmission. With respect to the two initial packets and one network coded packet, this retransmission scheme can be viewed as a pro...

Vehicle-to-vehicle (V2V) communications under dense urban environments usually experience severe keyhole fading effect especially for multi-input multi-output (MIMO) channels, which degrades the capacity and outage performance due to rank deficiency. To avoid these, integration of MIMO hybrid automatic repeat request (HARQ) is proposed assist V2V in this paper. By using methods integral transfo...

The reliability of a data communication can be improved by using an automatic repeat request (ARQ) protocol, in which the receiver requests the retransmission of data packets when an error is detected in the received data. The hybrid ARQ (HARQ) scheme combines an ARQ and an error correction coding [1]. Turbo codes proposed by Berrou et al. in 1993 [2] show an error correction capability approac...

This paper investigates the performance of coordinated multi-point (CoMP) networks in the presence of hybrid automatic repeat request (HARQ) feedback. With an information theoretic point of view, the throughput and the outage probability of different HARQ protocols are studied for slow-fading channels. The results are compared with the ones obtained in the presence of repetition codes and basic...