Utilization of Opportunistic-Bits With Paired Transmissions

Yin, Mingxi; Jiao, Bingli; Poor, H. Vincent

doi:10.1109/lwc.2018.2881959

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…However, the conventional packets are transmitted in the order labelled by their sequence numbers. The latency of the ω th conventional packet is τ C ω = βT + ωN T − ωβT , as given in (27). In comparison to the conventional transmission, the OB-based design offers shorter latency for those packets transmitted earlier than their sequence numbers but longer latency for those transmitted later than their sequence numbers.…”

Section: Latencymentioning

confidence: 99%

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Opportunistic Bits in Short-Packet Communications: A Finite Blocklength Perspective

Yin

Yang

et al. 2021

IEEE Trans. Commun.

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In this paper, the concept of opportunistic bits (OBs) is developed in short-packet communications and investigated from a finite blocklength perspective. In the OB-based transmission, the data unit of a packet is divided into two parts: OBs and conventional bits (CBs). The OBs are not physically transmitted but used to indicate the index of the time slot (TS) when the packet containing CBs is transmitted. The loading of a bulk of OB-based packets into multiple TSs can be modelled as a Repeated Balls-into-Bins process with a multi-queue storage. If the bulk is not large enough, certain combination(s) of OBs will not appear, which leaves certain TS(s) empty and hence reduces the TS load efficiency. To evaluate the OB-based transmission performance, we formulate its maximal payload rate and TS load efficiency. With the aid of these two formulations, the energy gain, the goodput, and the latency of OB-based short-packet communications are derived and obtained in analytical forms. For achieving further insights, illustrative numerical results on the resource utilisation efficiency and the performance not only substantiate the advantages of the OB-based transmission over the conventional but also provide useful tools and specifications for its design in massive short-packet communications.Index Terms-Opportunistic bit (OB), short-packet communications, finite blocklength, time slot (TS) load efficiency, maximal payload rate, energy gain, goodput.

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Section: Latencymentioning

confidence: 99%

“…At the receiver, the received packets will be reordered according to their sequence numbers prescribed by the TCP protocol. In [27], this OB transmission strategy was generalised into networks to pair packets of the same OBs and hence realize end-to-end transmissions.…”

Section: Introductionmentioning

confidence: 99%

Opportunistic Bits in Short-Packet Communications: A Finite Blocklength Perspective

Yin

Yang

et al. 2021

IEEE Trans. Commun.

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“…The idea of the multi level code (MLC) is to partition a signal set consisting of the high order modulation into the multiple levels, each of which contains low order modulation with the binary coded signals [1] [2]. The advantage lies in the fact that the partitioned signal sets can use different channel codes to satisfy their individual error protections.…”

Section: Introductionmentioning

confidence: 99%

“…One of the two kinds uses the mapping method based on concept of the opportunistic bit (OB) and the other uses the conventional modulation. The method of the OB was originally introduced for increasing the spectral efficiency of TCP/IP transmission, where the OB's mapping does not use explicitly either time resource and signal power, but uses the induces of the predesigned time slots (TSs) [1] [2]. Actually, the saving of time resource can increase the bandwidth efficiency and that of signal power the energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Application of Opportunistic Bit to Multilevel Codes

Jiao,

Yin,

Yang

2021

Preprint

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In this paper, we propose a new signal organization method to work in the structure of the multi level coding (MLC). The transmit bits are divided into opportunistic bit (OB) and conventional bit (CB), which are mapped to the lower level-and higher level signal in parallel to the MLC, respectively. Because the OB's mapping does not require signal power explicitly, the energy of the CB modulated symbol can be doubled. As the result, the overall mutual information of the proposed method is found higher than that of the conventional BPSK in one dimensional case. Moreover, the extension of the method to the two-complexdimension shows the better performance over the QPSK. The numerical results confirm this approach.

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