Performing an idle mode handoff in a wireless communication device
First Claim
1. A method of performing a handoff operation in a Wireless Communication Device (WCD) operating in a communication system, the WCD operating in an idle mode wherein the WCD transitions between a sleep state to conserve power and an awake state to receive one or more paging signals, comprising:
- a. determining during an awake state that a handoff from a first paging signal to a second paging signal is required;
b. determining during the awake state whether to postpone the handoff until a next awake state; and
c. transitioning from the awake state to a sleep state without performing the required handoff when it is determined to postpone the handoff,wherein the WCD is scheduled to transition from the awake state to the sleep state at a scheduled time, and wherein;
step (a) comprises determining at a first time during the awake state that the handoff is required;
step (b) comprises determining whether the first time precedes the scheduled time by less than a predetermined time period; and
step (c) comprises transitioning from the awake state to the sleep state at the scheduled time without performing the required handoff when it is determined that the first time proceeds the scheduled time by less than the predetermined time period.
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Abstract
A Wireless Communication Device (WCD) inter-operates with a Code Division Multiple Access (CDMA) communication system. The WCD operates in an idle mode wherein the WCD transitions between a sleep state to conserve power and an awake state to receive one or more paging signals. The WCD attempts to reacquire a first pilot signal associated with a first paging signal that was previously being demodulated, and a second pilot signal that was previously being tracked. The WCD performs a handoff from the first paging signal to a second paging signal associated with the second pilot signal when the attempt to reacquire the first pilot signal fails and the attempt to reacquire the second pilot signal is successful.
54 Citations
23 Claims
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1. A method of performing a handoff operation in a Wireless Communication Device (WCD) operating in a communication system, the WCD operating in an idle mode wherein the WCD transitions between a sleep state to conserve power and an awake state to receive one or more paging signals, comprising:
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a. determining during an awake state that a handoff from a first paging signal to a second paging signal is required; b. determining during the awake state whether to postpone the handoff until a next awake state; and c. transitioning from the awake state to a sleep state without performing the required handoff when it is determined to postpone the handoff, wherein the WCD is scheduled to transition from the awake state to the sleep state at a scheduled time, and wherein; step (a) comprises determining at a first time during the awake state that the handoff is required; step (b) comprises determining whether the first time precedes the scheduled time by less than a predetermined time period; and step (c) comprises transitioning from the awake state to the sleep state at the scheduled time without performing the required handoff when it is determined that the first time proceeds the scheduled time by less than the predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for performing a handoff operation in a Wireless Communication Device (WCD) operating in a communication system, the WCD operating in an idle mode wherein the WCD transitions between a sleep state to conserve power and an awake state to receive one or more paging signals, comprising;
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first means for determining during an awake state that a handoff from a first paging signal to a second paging signal is required; second means for determining during the awake state whether to postpone the handoff until a next awake state; and third means for transitioning from the awake state to a sleep state without performing the required handoff when it is determined to postpone the handoff, wherein the WCD is scheduled to transition from the awake state to the sleep state at a scheduled time, and wherein; the first means comprises means for determining at a first time during the awake state that the handoff is required; the second means comprises means for determining whether the first time precedes the scheduled time by less than a predetermined time period; and the third means comprises means for transitioning from the awake state to the sleep state at the scheduled time without performing the required handoff when it is determined that the first time precedes the scheduled time by less than the predetermined time period. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification