Data-link cost

Read the equation

Combines frame-loss fraction and bandwidth utilization with weights a₂ and b₂. Whether high utilization should be penalized depends on the intended operational objective.

Terms & definitions

The recovered passage does not supply a separate symbol table. Read the source context for the notation used in this version; familiar letters may carry different meanings in other builds.

How it works

1. Read Cost_2 as the quantity being defined or updated by this relation.

2. Substitute the source-defined variables or recorded values and follow the displayed arithmetic and indexing exactly.

3. Use this version’s variable definitions and update order. The same symbol may be assigned a different meaning in another build.

Assumptions & limits

Source recovery establishes that the expression appears in this record. Its mathematical validity, implementation behavior, and interpretation must be assessed separately. See the linked source and research notes for the checks available for this version.

Original context

Layer 1 — Physical
\text{Cost}_1 = a_1\cdot BER + b_1\cdot\frac{1}{SNR}

Layer 2 — Link
\text{Cost}_2 = a_2 FL + b_2 U_2

Layer 3 — Network
\text{Cost}_3 = a_3 L_3 + b_3 C_3

Layer 4 — Transport
\text{Cost}_4 = a_4 R_t + b_4(1/W_t)

\text{Cost}_2 = a_2 FL + b_2 U_2

Related builds