Wireless communication airlink protocol
OwnerDavid C. Schaferinventor
Life of this patent
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Abstract
The present invention relates to air-link protocols which optimally permit wireless communication in a point-to-multipoint communication system. The protocols include establishment of an adaptive time division duplex channel, dynamic allocation of bandwidth, provision of multiple modulation schemes within the TDD operation, and bandwidth allocation.
Claims29
A method of communicating over a forward portion of a time division duplex channel (TDD) to provide wireless connectivity between a hub and a plurality of remote terminals, comprising the steps of:
- assembling control and payload data;
- performing forward error correction on at least a portion of the assembled payload data to produce payload blocks;
- framing the payload blocks into a plurality of discrete time slots;
- performing byte to m-tuple conversion on the plurality of discrete time slots bytes to produce a series of binary symbols;
- modulating the series of binary symbols to produce a series of transmit symbols;
- baseband shaping the transmit symbols, and transmitting the transmit symbols.
A signaling protocol for use in wireless point-to-multipoint communications, comprising:
- a forward portion including a control time slot and a plurality of forward payload time slots, wherein each forward payload time slot is associated with a modulation level, and wherein the modulation levels of the forward payload time slots increase monotonically with forward time slot transmission;
- and
- a reverse portion including a plurality of reverse payload time slots, wherein each reverse payload time slot is associated with a modulation level, and wherein the modulation levels of the reverse payload time slots increase monotonically with forward time slot transmission;
- wherein at least two modulation levels are utilized in both of the forward portion and the reverse portion.
An adaptive time division duplex (ATDD) frame for wireless communication in a point-to-multipoint system with the point-to-multipoint system including a plurality of remote terminals, comprising:
- a forward portion including a control portion and a variable number of payload slots;
- and
- a reverse portion including a variable number of payload slots;
- wherein at least two modulation levels are utilized in the ATDD frame, wherein the control portion is transmitted utilizing a lowest modulation level of said at least two modulation levels, and wherein the control portion carries information with respect to the number of forward portion payload slots and the number of reverse portion payload slots.
Dependencies are inferred from the claim text.