Minimal maintenance link to support synchronization
First Claim
1. A method performed by a base station processor, transmitter, and receiver circuitry for supporting wireless communications, the method comprising:
- assigning, via the base station processor circuitry, a plurality of codes to a field unit;
transmitting, from the base station transmitter circuitry, an indication of the plurality codes assigned to the field unit;
receiving, via the base station receiver circuitry, a first message in at least one time slot, wherein the first message includes one of the plurality of codes, wherein the one of the plurality of codes is associated with a type of field unit request;
analyzing, via the base station processor circuitry, the one of the plurality of codes received to determine a timing adjustment to be made at the field unit to synchronize the field unit with a base station; and
transmitting, from the base station transmitter circuitry, a second message to the field unit that includes the timing adjustment, wherein the timing adjustment indicates an amount to advance timing or alternatively an amount to retard timing.
1 Assignment
0 Petitions
Accused Products
Abstract
Multiple field units in a CDMA system are synchronized for communication with a base station using a shared forward and reverse link channel. Each field unit is assigned a time slot in a forward link channel to receive messages from the base station. Likewise, each field unit is assigned a time slot on a common reverse link channel for transmitting messages to the base station. Timing alignment among each of many field units and the base station is achieved by analyzing messages received at the base station in a corresponding time slot from each field unit. Thereafter, a message is transmitted in a corresponding time slot to a particular field unit from the base station for adjusting its timing so that future messages transmitted from the field unit are received in the appropriate time slot at the base station. In this way, minimal resources are deployed to maintain communication and precise synchronization between a base station and each of multiple users, minimizing collisions between field units transmitting in adjacent time slots on the reverse link.
434 Citations
20 Claims
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1. A method performed by a base station processor, transmitter, and receiver circuitry for supporting wireless communications, the method comprising:
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assigning, via the base station processor circuitry, a plurality of codes to a field unit; transmitting, from the base station transmitter circuitry, an indication of the plurality codes assigned to the field unit; receiving, via the base station receiver circuitry, a first message in at least one time slot, wherein the first message includes one of the plurality of codes, wherein the one of the plurality of codes is associated with a type of field unit request; analyzing, via the base station processor circuitry, the one of the plurality of codes received to determine a timing adjustment to be made at the field unit to synchronize the field unit with a base station; and transmitting, from the base station transmitter circuitry, a second message to the field unit that includes the timing adjustment, wherein the timing adjustment indicates an amount to advance timing or alternatively an amount to retard timing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station processor, transmitter, and receiver circuitry to operate within a wireless communication network, wherein the base station processor, transmitter, and receiver circuitry comprises:
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the base station processor circuitry configured to assign a plurality of codes to a field unit; the base station transmitter circuitry configured to transmit an indication of a plurality of codes assigned to a field unit; the base station receiver circuitry configured to receive a message in at least one time slot, wherein the message includes one of the plurality of codes, wherein the one of the plurality of codes is associated with a type of field unit request; the base station processor circuitry configured to analyze the one of the plurality of codes received to determine a timing adjustment to be made at the field unit to synchronize the field unit with a base station; and the base station transmitter circuitry further configured to transmit a feedback message to the field unit containing the timing adjustment, wherein the timing adjustment indicates an amount to advance timing or alternatively an amount to retard timing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. Non-transitory computer readable storage media having instructions stored thereupon that, when executed by base station processor, transmitter, and receiver circuitry of a base station, the instructions cause the base station to perform operations including:
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assigning, via the base station processor circuitry, a plurality of codes to a field unit; transmitting, from the base station transmitter circuitry, an indication of the plurality codes assigned to the field unit; receiving, via the base station receiver circuitry, a first message in at least one time slot, wherein the first message includes one of the plurality of codes, wherein the one of the plurality of codes is associated with a type of field unit request; analyzing, via the base station processor circuitry, the one of the plurality of codes received to determine a timing adjustment to be made at the field unit to synchronize the field unit with a base station; and transmitting, from the base station transmitter circuitry, a second message to the field unit that includes the timing adjustment, wherein the timing adjustment indicates an amount to advance timing or alternatively an amount to retard timing. - View Dependent Claims (20)
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Specification