Common packet channel
First Claim
1. A method of wireless transmission of information, comprising:
- (a) transmitting a signal comprising a single preamble randomly selected from among a group of available preambles, at a power level;
(b) determining if number of preamble transmissions has reached a limit;
(c) determining if an acknowledgement corresponding a preamble transmission is received from a base station;
(d) if the number of preamble transmissions has not reached the limit and there has been no receipt of a corresponding acknowledgement, repeating step (a) at a higher power level and repeating steps (b) and (c);
(e) ceasing transmitting of the signal, upon any determination at (b) that the number of preamble transmissions has reached the limit; and
(f) upon any determination at (c) that a corresponding acknowledgement is received from the base station, initiating transmission of information over a wireless spread-spectrum uplink channel to the base station.
4 Assignments
0 Petitions
Accused Products
Abstract
An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The BS-spread-spectrum transmitter, responsive to the BS-spread-spectrum receiver receiving the access-burst signal, transmits an acknowledgment signal. In response to the first RS-spread-spectrum receiver receiving the acknowledgment signal, the first RS-spread-spectrum transmitter transmits a spread-spectrum signal having data.
58 Citations
23 Claims
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1. A method of wireless transmission of information, comprising:
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(a) transmitting a signal comprising a single preamble randomly selected from among a group of available preambles, at a power level; (b) determining if number of preamble transmissions has reached a limit; (c) determining if an acknowledgement corresponding a preamble transmission is received from a base station; (d) if the number of preamble transmissions has not reached the limit and there has been no receipt of a corresponding acknowledgement, repeating step (a) at a higher power level and repeating steps (b) and (c); (e) ceasing transmitting of the signal, upon any determination at (b) that the number of preamble transmissions has reached the limit; and (f) upon any determination at (c) that a corresponding acknowledgement is received from the base station, initiating transmission of information over a wireless spread-spectrum uplink channel to the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of wireless transmission of information, comprising:
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(a) transmitting a signal comprising a single preamble randomly selected from among a group of available preambles, at a power level; (b) determining if number of preamble transmissions has reached a limit; (c) determining if an acknowledgement corresponding a preamble transmission is received from the base station; (d) if the number of preamble transmissions has not reached the limit and there has been no receipt of a corresponding acknowledgement, repeating step (a) at a higher power level, transmitting a pilot symbol, and repeating steps (b) and (c); (e) ceasing transmitting of the signal, upon any determination at (b) that the number of preamble transmissions has reached the limit; (f) upon any determination at (c) that a corresponding acknowledgement is received from the base station, randomly selecting a collision detection symbol from among a number of possible collision detection symbols; (h) transmitting the collision detection symbol at a power level the same as the power level used for the preamble transmission immediately preceding the receipt of the corresponding acknowledgement; (g) if a collision detection acknowledgment corresponding to the collision detection symbol is received, transmitting information over a wireless spread-spectrum uplink channel to the base station; and (h) receiving information over a wireless spread-spectrum downlink channel from the base station. - View Dependent Claims (12, 13)
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14. A spread-spectrum wireless mobile station, comprising:
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a spread-spectrum transmitter; a spread-spectrum receiver; and a controller coupled to the spread-spectrum receiver for responding to received signals and coupled for controlling the spread-spectrum transmitter, such that in operation the wireless mobile station performs steps comprising; (a) transmitting a signal comprising a single preamble randomly selected from among a group of available preambles, at a power level; (b) determining if number of preamble transmissions has reached a limit; (c) determining if an acknowledgement corresponding a preamble transmission is received from a base station; (d) if the number of preamble transmissions has not reached the limit and there has been no receipt of a corresponding acknowledgement, repeating step (a) at a higher power level and repeating steps (b) and (c); (e) ceasing transmitting of the signal, upon any determination at (b) that the number of preamble transmissions has reached the limit; and (f) upon any determination at (c) that a corresponding acknowledgement is received from the base station, initiating transmission of information over a wireless spread-spectrum uplink channel to the base station. - View Dependent Claims (15, 16, 17)
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18. A base band processor for use in a spread-spectrum wireless remote station, comprising:
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an acknowledgment detector for detecting an acknowledgment in received spread-spectrum signals; a data and control processor, for detecting and processing data and control information contained in received spread-spectrum signals; a encoder, for encoding data; a preamble generator for generating preambles; a multiplexer for multiplexing the encoded data and the preambles; a packet formatter, coupled to the multiplexer, for formatting the multiplexed data and preambles into packets; and a controller coupled to the acknowledgment detector for controlling the preamble generator, the multiplexer and the packet formatter, such that in operation the base band processor performs steps comprising; (a) transmitting a signal comprising a single preamble randomly selected from among a group of available preambles, at a power level; (b) determining if number of preamble transmissions has reached a limit; (c) determining if an acknowledgement corresponding a preamble transmission is received from a base station; (d) if the number of preamble transmissions has not reached the limit and there has been no receipt of a corresponding acknowledgement, repeating step (a) at a higher power level and repeating steps (b) and (c); (e) ceasing transmitting of the signal, upon any determination at (b) that the number of preamble transmissions has reached the limit; and (f) upon any determination at (c) that a corresponding acknowledgement is received from the base station, initiating transmission of information over a wireless spread-spectrum uplink channel to the base station. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification