Performance Analysis on Two-Way Relay System with Co-Channel Interference

Mode selection schemes for unicasting device‐to‐device communications supported by network coding

“…Channel estimation errors and the impact of power allocation on the performance of traditional as well as PNC are examined in Tabataba et al That paper proposes simple power allocation techniques that are well suited to both perfect and imperfect channel state information conditions and high and low signal‐to‐noise ratios (in interference‐free scenarios) and rely on channel statistics. The impact of co‐channel interference on the performance of the 2‐way relay system including the 2‐ and 3‐time slot schemes is studied in Yang et al More recently, Yadav and Upadhyay investigated the impact of outdated channel estimates on 2‐way PNC‐based relaying without interference. Although the results and methodologies developed in these papers provide valuable insights, they do not easily generalize to scenarios in which multicell interference is present and both cellular and D2D modes are available for proximity communications.…”

“…Alternatively, in a cellular network in which the eNB uses PNC, 2 time slots are sufficient for the exchange of x 1 and x 2 . That is, using PNC or 2 time slot (2‐TS) NWC, UE1 and UE2 transmit on the same resource (TS‐1), while the eNB uses TS‐2 to transmit the network coded data f ( x 1 , x 2 ) to UE1 and UE2 at the same time . UE1 and UE2 use cellular links to receive f ( x 1 , x 2 ) and decode x 2 and x 1 , respectively.…”

“…Studies have shown that when local (proximal) communication opportunities exist in a cellular network, physical‐layer network coding (PNC) improves the spectrum efficiency by enabling resource reuse by multiple transmissions and cancelling harmful interference using advanced signal processing techniques . Despite the large differences between D2D communications assisted by a cellular network and using various forms of network coding (NWC), their ultimate objective of improving the spectral efficiency and increasing the network capacity by enabling tighter reuse of resources is comparable.…”

Network coding schemes for Device-to-Device communications based relaying for cellular coverage extension

“…Similarly to the . Analogue network coding using the two-RB and three-RB NWC schemes similarly to the two-slot and three-slot schemes proposed by [18] and [19]. In the simple example of this figure, using the notation of Table I N = 2 and Nr = 1.…”

“…Thus, such an arrangement is no longer transparent to UE1, but offers the possibility of efficiently reusing RB:s in the system. Also, a consequence of the two-RB AF scheme is that the simultaneous reception of the two DL signals on RB1 allows the UE2 to transmit the superposition of the two signals to UE1 and the BS using a single resource (RB3) [18], [19] requiring only two RB:s for the two-way communication as illustrated in Figure 5. (Justifying the terminology of the two-RB scheme.)…”