Method of tone allocation for tone hopping sequences

Details Method of tone allocation for tone hopping sequences Method of tone allocation for tone hopping sequences

2007-05-01

2007-05-01

Kumar, Pankaj (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S132000, C375S138000, C370S436000

Reexamination Certificate

active

10174144

ABSTRACT:
Methods and apparatus for allocating tones for communications purposes in adjoining cells of an OFDM system are described. Tones used in each cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function. Different cells use different tone to tone hopping sequence allocation functions to minimize the number of collisions between hopping sequences of neighboring cells. Tone hopping sequence to communications channel allocation functions are used to allocate tone hopping sequences to communications channels. Communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data. Over time, a wireless terminal uses the tones included in the tone hopping sequences corresponding to communications channels it is authorized to use. Accordingly, tones are assigned to communications devices by a multi-function, e.g., two level, mapping operation.

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