Method and system for data and voice transmission over shared and dedicated channels
First Claim
1. A method for transmitting first and second signals in a code division multiple access system, comprising:
- including access information in said first signal for accessing said second signal;
providing first and second coded channels;
transmitting said first signal via said first coded channel;
delaying said second signal by a predetermined delay; and
transmitting said second signal via said second coded channel after said predetermined delay.
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Accused Products
Abstract
In one disclosed embodiment, data information is stored in a buffer in a transmitter. The data information is transmitted on a shared channel and control information for recovering the associated data information is transmitted on a dedicated channel. The shared and dedicated channels can be, for example, different portions of the frequency band. The control information can include a spreading factor used to spread the data at the transmitter. For example, the spreading factor can be the length of the Walsh function orthogonal coding used to spread the data. The control information is received over the dedicated channel before the associated data information is received over the shared channel. The control information is then used to recover the associated data information. For example, knowing the spreading factor from the control information, the correct Walsh function can be selected to de-spread, i.e. to Walsh de-cover, the data information.
50 Citations
15 Claims
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1. A method for transmitting first and second signals in a code division multiple access system, comprising:
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including access information in said first signal for accessing said second signal;
providing first and second coded channels;
transmitting said first signal via said first coded channel;
delaying said second signal by a predetermined delay; and
transmitting said second signal via said second coded channel after said predetermined delay. - View Dependent Claims (2, 3, 4)
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5. A method for receiving first and second signals in a code division multiple access system, comprising:
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receiving said first signal via a first coded channel;
retrieving access information for said second signal from said first signal;
receiving said second signal via a second coded channel; and
accessing said second signal using access information retrieved from said first signal. - View Dependent Claims (6, 7)
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8. An apparatus for transmitting first and second signals in a code division multiple access system, comprising:
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means for including access information in said first signal for accessing said second signal;
means for providing first and second coded channels;
means for transmitting said first signal via said first coded channel;
means for delaying said second signal by a predetermined delay; and
means for transmitting said second signal via said second coded channel after said predetermined delay. - View Dependent Claims (9, 10, 11)
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12. An apparatus for receiving first and second signals in a code division multiple access system, comprising:
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means for receiving said first signal via a first coded channel;
means for retrieving access information for said second signal from said first signal;
means for receiving said second signal via a second coded channel; and
means for accessing said second signal using access information retrieved from said first signal. - View Dependent Claims (13, 14)
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15. An apparatus for transmitting a data signal and a signal having control information in a code division multiple access system, comprising:
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a buffer for storing said data signal at symbol level;
a Walsh cover circuit connected to said buffer, said Walsh cover circuit being configured to spread said data signal at symbol level to chip level;
a first transmitter connected to said Walsh cover circuit, said transmitter being configured to transmit said data signal at chip level via a first coded channel;
a second transmitter configured to transmit said signal with control information at chip level via a second coded channel, wherein said first transmitter transmits said data signal at a predetermined delay after said second transmitter transmits said signal having control information.
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Specification