Maintaining a maintenance channel in a reverse link of a wireless communications system
First Claim
1. A method of transmitting a request signal using a first reverse link channel, the method comprising:
- establishing a connection with a wireless network utilizing an access channel;
receiving by a field unit, assignment information and deriving a value associated with an offset from the assignment information;
applying a modulo function to at least the value to compute a series of periodic time intervals, each time interval including at least one time slot in the first reverse link channel for transmitting a request signal;
wherein the request signal indicates that the field unit is requesting to transmit packet data to a base transceiver station (BTS); and
transmitting the request signal using the first reverse link channel to the BTS in the computed time interval;
wherein the request signal is transmitted using the first reverse link channel on a condition that the connection is established and the field unit is not allocated a second reverse link channel to transmit packet data;
wherein the first reverse link channel is not an access channel.
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Abstract
In a reverse link of a wireless CDMA communication system, a method of maintaining an idling mode connection between a field unit and a base transceiver station is provided using various techniques to maintain the idle mode connection at a reduced power level. A preferred embodiment computes a time slot or frame offset based on modulo function using a field unit identifier in order to distribute field unit maintenance transmissions among available slots or offsets. An alternate embodiment detects explicit signaling states changes at the physical layer and causes power target changes. A further embodiment transmits maintenance data during predetermined time intervals, coordinated between the field units and BTS, allowing power levels to be adjusted accordingly.
31 Citations
16 Claims
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1. A method of transmitting a request signal using a first reverse link channel, the method comprising:
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establishing a connection with a wireless network utilizing an access channel; receiving by a field unit, assignment information and deriving a value associated with an offset from the assignment information; applying a modulo function to at least the value to compute a series of periodic time intervals, each time interval including at least one time slot in the first reverse link channel for transmitting a request signal;
wherein the request signal indicates that the field unit is requesting to transmit packet data to a base transceiver station (BTS); andtransmitting the request signal using the first reverse link channel to the BTS in the computed time interval;
wherein the request signal is transmitted using the first reverse link channel on a condition that the connection is established and the field unit is not allocated a second reverse link channel to transmit packet data;
wherein the first reverse link channel is not an access channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A field unit for transmitting a request signal using a first reverse link channel, the field unit comprising:
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a circuit configured to establish a connection with a wireless network utilizing an access channel; the circuit is further configured to receive assignment information and to derive a value associated with an offset from the assignment information; the circuit is further configured to apply a modulo function to at least the value to compute a series of periodic time intervals in the first reverse link channel for transmitting a request signal;
wherein each time interval includes at least one time slot;
wherein the request signal indicates that the field unit is requesting to transmit packet data to a base transceiver station (BTS); andthe circuit is further configured to transmit the request signal using the first reverse link channel to the BTS in the computed time interval;
wherein the request signal is transmitted using the first reverse link channel on a condition that the connection is established and the field unit is not allocated a second reverse link channel to transmit packet data;
wherein the first reverse link channel is not an access channel. - View Dependent Claims (10, 11, 12)
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13. A base station for receiving a request signal using a first reverse link channel, the base station comprising:
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a circuit configured to establish a connection with a field unit utilizing an access channel; the circuit is further configured to transmit assignment information;
wherein the assignment information is used by the field unit to derive a value associated with an offset from the assignment information;the circuit is further configured to apply a modulo function to at least the value to compute a series of periodic time intervals in the first reverse link channel for receiving a request signal from the field unit;
wherein each time interval includes at least one time slot;
wherein the request signal indicates that the filed unit is requesting to transmit packet data to the base station; andthe circuit is further configured to receive the request signal using the first reverse link channel in the computed time interval;
wherein the request signal is received using the first reverse link channel on a condition that the connection is established and the field unit is not allocated a second reverse link channel to transmit packet data;
wherein the first reverse link channel is not an access channel. - View Dependent Claims (14, 15, 16)
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Specification