Enhanced Handoff Scheme for Downlink-Uplink Asymmetric Channels in Cellular Systems

Table 1

Notations for system model.

Notation	Description
𝑑	Distance between the BS in the center cell and the BS in a neighbor cell
𝑏	Index of the BS in the center cell
𝑚	Index of the MS in the center cell
𝑛	Index of the MS in the neighbor cell
𝑧	Index of the BS in the neighbor cell
𝑟ℎ	Distance between the center and the vertex of a hexagonal cell
𝑟𝑒	Radius of an equivalent circle to a hexagonal cell
𝑅1	Distance between a BS and an MS in the center cell
𝑅2	Distance between a BS in a neighbor cell and an MS in the center cell
𝑅3	Distance between a BS in the center cell and an MS in a neighbor cell
𝛾	Cell Propagation loss factor (=−4)
𝜀	Minimum distance between a BS and an MS
𝑃^(𝑡)max,BSserving	Maximum transmission power of a BS in the center cell
𝑃^(𝑡)max,MSserving	Maximum transmission power of an MS in the center cell
𝑃^(𝑡)max,BSneighbor	Maximum transmission power of a BS in a neighbor cell
𝑃^(𝑡)max,MSneighbor	Maximum transmission power of an MS in a neighbor cell
𝜁𝑏→𝑚	Shadow fading from BS b to MS m
𝜃	Main lobe width of sectored cells
𝛿	Average number of active MSs in a cell
𝛼	Downlink resource allocation ratio per MS
𝛽	Uplink resource allocation ratio per MS