TIME-SLOTTED DATA PACKETS WITH A PREAMBLE
First Claim
1. A subscriber unit comprising:
- circuitry configured to receive a first shared Code Division Multiple Access (CDMA) channel having a first spreading factor, wherein the first shared CDMA channel includes modulation information for a second shared CDMA channel having a second spreading factor, wherein the first spreading factor differs from the second spreading factor;
wherein the circuitry is further configured, on a condition that the first shared CDMA channel is for the subscriber unit, to demodulate the second shared CDMA channel;
wherein the second shared CDMA channel includes packet data and the second shared CDMA channel is received in at least one time slot; and
wherein a portion of the first shared CDMA channel occurs in time prior to the second shared CDMA channel.
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Accused Products
Abstract
A method and apparatus are used to support the transmission of data to a user over multiple allocated data channels. Data packets are transmitted in time-slots of the allocated data channels to corresponding target receivers without the need for explicitly assigning particular time-slots to a target user well in advance of transmitting any data packets in the time-slots. Instead, each data packet transmitted in a time-slot includes a header label or preamble indicating to which of multiple possible receivers a data packet is directed. The preamble also preferably includes decoding information indicating how a corresponding data payload of the data packet is to be processed for recapturing transmitted raw data.
28 Citations
19 Claims
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1. A subscriber unit comprising:
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circuitry configured to receive a first shared Code Division Multiple Access (CDMA) channel having a first spreading factor, wherein the first shared CDMA channel includes modulation information for a second shared CDMA channel having a second spreading factor, wherein the first spreading factor differs from the second spreading factor; wherein the circuitry is further configured, on a condition that the first shared CDMA channel is for the subscriber unit, to demodulate the second shared CDMA channel; wherein the second shared CDMA channel includes packet data and the second shared CDMA channel is received in at least one time slot; and wherein a portion of the first shared CDMA channel occurs in time prior to the second shared CDMA channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A base station comprising:
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circuitry configured to transmit a first shared Code Division Multiple Access (CDMA) channel, having a first spreading factor, for a particular subscriber unit, wherein the first shared CDMA channel includes modulation information for a second shared CDMA channel, having a second spreading factor, for the particular subscriber unit, wherein the first spreading factor differs from the second spreading factor; wherein the circuitry is further configured to transmit the second shared CDMA channel for the particular subscriber unit, wherein the second shared CDMA channel includes packet data and a modulation associated with the modulation information and is transmitted in at least one time slot; and wherein a portion of the first shared CDMA channel occurs in time prior to the second shared CDMA channel. - View Dependent Claims (15)
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16. A method for use in a subscriber unit, the method comprising:
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receiving a first shared Code Division Multiple Access (CDMA) channel having a first spreading factor, wherein the first shared CDMA channel includes modulation information for a second shared CDMA channel having a second spreading factor, wherein the first spreading factor differs from the second spreading factor; demodulating the second shared CDMA channel on a condition that the first shared CDMA channel is for the subscriber unit; wherein the second shared CDMA channel includes packet data and the second shared CDMA channel is received in at least one time slot; and wherein a portion of the first shared CDMA channel occurs in time prior to the second shared CDMA channel. - View Dependent Claims (17)
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18. A method for use in a base station, the method comprising:
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transmitting a first shared Code Division Multiple Access (CDMA) channel, having a first spreading factor, for a particular subscriber unit, wherein the first shared CDMA channel includes modulation information for a second shared CDMA channel, having a second spreading factor, for the particular subscriber unit, wherein the first spreading factor differs from the second spreading factor; transmitting the second shared CDMA channel for the particular subscriber unit, wherein the second shared CDMA channel includes packet data and a modulation associated with the modulation information and is transmitted in at least one time slot; and wherein a portion of the first shared CDMA channel occurs in time prior to the second shared CDMA channel. - View Dependent Claims (19)
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Specification