METHOD FOR USING AN ADAPTIVE WAITING TIME THRESHOLD ESTIMATION FOR POWER SAVING IN SLEEP MODE OF AN ELECTRONIC DEVICE
First Claim
1. A method for dynamically varying waiting time threshold in a wireless communications system comprising the steps of:
- operating a mobile subscriber station (MSS) in the communications system;
calculating a value for an average arrival rate based on a downlink and uplink traffic arrival pattern; and
minimizing a waiting time threshold in case of larger inter arrival time so that the MSS transitions into a sleep made in a substantially rapid manner for proving a longer sleep duration.
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Accused Products
Abstract
Portable battery operated electronic devices often use a “sleep mode” for energy conservation. A key feature introduced in the IEEE 802 standard ensures power-efficient operation of these battery operated mobile devices. However, the standard fails to define what will trigger a device into the sleep mode while other systems define “waiting time threshold” as a time for which a Mobile Subscriber Station (MSS) waits before entering into sleep mode which has a constant duration. An embodiment of the present invention uses a unique method (1500) and algorithm for optimizing waiting time threshold (1509) according to traffic arrival pattern for uplink (UL) and downlink (DL) data packets. This leads to significant reduction in energy consumption with little increase in average waiting delay and acceptable end-to-end delay for non real time traffic.
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Citations
10 Claims
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1. A method for dynamically varying waiting time threshold in a wireless communications system comprising the steps of:
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operating a mobile subscriber station (MSS) in the communications system; calculating a value for an average arrival rate based on a downlink and uplink traffic arrival pattern; and minimizing a waiting time threshold in case of larger inter arrival time so that the MSS transitions into a sleep made in a substantially rapid manner for proving a longer sleep duration. - View Dependent Claims (2, 3, 4)
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5. A method for enhancing power efficiency during sleep mode operation in an electronic device, comprising the steps of:
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operating a mobile device using a default wait time threshold duration; initializing a waiting time threshold timer to the default wait time threshold duration; computing a first new wait time threshold duration based on current traffic conditions if a packet is received at the mobile device during the default wait time threshold; entering a sleep mode if no packet is received during the default wait time duration; immediately switching to an active mode if in sleep mode and an uplink packet arrives and calculating a second new wait time threshold duration based on current traffic conditions; and concluding sleep mode and switching to an active mode if a downlink packet arrives and calculating a third new waiting time threshold according to current traffic conditions. - View Dependent Claims (6)
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7. A method for dynamically varying a waiting time threshold in a communications system utilizing wireless mobile devices for conserving battery life comprising the steps of:
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initializing a threshold timer in the wireless mobile device for initiating an default wait time threshold; determining if an uplink packet or downlink packet has arrived before expiration of the threshold timer; computing a first new wait time threshold if an uplink packet or downlink packet has arrived; entering a sleep mode having a first sleep mode period if no uplink packet or downlink packet has arrived; transitioning to an active mode upon arrival of an uplink packet and computing a second new wait time threshold; transitioning to an active mode upon arrival of a downlink packet and expiration of a first sleep mode period; and calculating a second sleep mode period if no uplink packet or downlink packet are received. - View Dependent Claims (8, 9, 10)
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Specification