Skip to main content

Table 2 List of notations

From: Open sub-granting radio resources in overlay D2D-based V2V communications

Notation

Interpretation

\(D\)

Set of D2D users where \(d_{k}\in D\)  for \(k=1,...,N\)

\(C\)

Set of D2I users where \(c_{m}\in C\) for \(m=1,...,M\)

L

Set of allocated RBs to D2D communication

F

Set of available RBs on eNB

\(B_w\)

Allocated bandwidth

b

Number of allocated RBs to every entities where \(b=1,...,F\)

\({\mathbb {X}}\)

Sub-granting allocation indicator

\(\alpha _c\)

Path-loss component for D2I user

\(\alpha _d\)

Path-loss component for D2D user

\(\mu _c\)

Fading component for D2I user

\(\mu _d\)

Fading component for D2D user

\(\sigma _0\)

White Gaussian Noise

\(\sigma\)

Shadowing term

\({P}_{m}\)

Transmission power of D2I transmitter, \(m=1,...,M\)

\({P}^C_{MAX}\)

Power threshold limit for D2I transmitter

\({P}_{k}\)

Transmission power of D2D transmitter, \(k=1,...,N\)

q

Modulation and coding scheme of every entities

\(\epsilon\)

General term for BLER

\(\epsilon ^D_{th}\)

Minimum BLER threshold for D2D communication

\(\epsilon ^{sg}_{th}\)

Minimum BLER threshold for sub-granting

\(\epsilon _{mk}\)

Measured BLER between D2D and D2I users

T

Subframe transmission time

\({\tau }\)

Data transmission duration

\(T_{me}\)

Channel state information transmission interval

\(T_{pos}\)

Position information transmission interval

\(T_{br}\)

Bids transmission interval

\(S_{Min}\)

Sub-granting signaling processing time

\({\mathscr {Z}}\)

Unique number of a cellular user in network