Apparatus and method for reducing power consumption in ad-hoc network
First Claim
1. A power consumption reducing apparatus comprising:
- a periodic active state conversion unit which, in each awake period, converts an inactive state into an active state, wherein power consumption is greater in the active state than in the inactive state;
a beacon frame reception unit which, in an active state converted by the period active state conversion unit, receives a beacon frame;
an awake window setting unit which, when the beacon frame reception unit receives the beacon frame, and if an interval value of an awake window, in which the active state is maintained for a predetermined time, among field values of the received beacon frame is valid, sets the awake window;
an awake window interval counting unit which counts, in a counting, the interval value in the awake window set by the awake window setting unit; and
an inactive state conversion unit which, if the awake window counting unit finishes the counting, converts the awake window into an inactive state, whereinif the beacon frame reception unit does not receive the beacon frame within a predetermined time, or if the beacon frame is received within the predetermined time and a length value of the awake window contained in the received beacon frame is not valid, the awake window setting unit converts the active state into the inactive state.
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Abstract
A power consumption reducing apparatus and method are provided wherein the apparatus includes a periodic active state conversion unit which converts an inactive state into an active state; a beacon frame reception unit which, in an active state, receives a beacon frame; an awake window setting unit which sets the awake window; an awake window interval counting unit which counts the interval value in the awake window; and an inactive state conversion unit which converts the awake window into an inactive state. According to the apparatus, an active state needs to be maintained only during a window interval such that power consumption can be reduced during an inactive interval. In addition, an ATIM window is replaced by an awake window such that an ATIM message that has been regarded as a network overhead, and an acknowledgement response frame to the message are removed, that is, the network overheads are removed.
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Citations
49 Claims
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1. A power consumption reducing apparatus comprising:
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a periodic active state conversion unit which, in each awake period, converts an inactive state into an active state, wherein power consumption is greater in the active state than in the inactive state; a beacon frame reception unit which, in an active state converted by the period active state conversion unit, receives a beacon frame; an awake window setting unit which, when the beacon frame reception unit receives the beacon frame, and if an interval value of an awake window, in which the active state is maintained for a predetermined time, among field values of the received beacon frame is valid, sets the awake window; an awake window interval counting unit which counts, in a counting, the interval value in the awake window set by the awake window setting unit; and an inactive state conversion unit which, if the awake window counting unit finishes the counting, converts the awake window into an inactive state, wherein if the beacon frame reception unit does not receive the beacon frame within a predetermined time, or if the beacon frame is received within the predetermined time and a length value of the awake window contained in the received beacon frame is not valid, the awake window setting unit converts the active state into the inactive state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A power consumption reducing method comprising:
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(a) converting in each awake period, an inactive state into an active state as a converted active state, wherein power consumption is greater in the active state than in the inactive state; (b) receiving, in the converted active state, a beacon frame as a received beacon frame; (c) when the beacon frame is received in the step (b), and if an interval value of an awake window, in which the active state is maintained for a predetermined time, among field values of the received beacon frame is valid, setting the awake window as a set awake window; (d1) counting the interval value in the set awake window; and (e) if the counting is finished in the step (dl), converting the awake window into the inactive state, wherein in the step (c) if the beacon frame is not received in the step (a) within a predetermined time, or if the beacon frame is received within the predetermined time and a length value of the awake window contained in the received beacon frame is not valid, the active state is converted into the inactive state. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A computer readable medium having embodied thereon a computer program for enabling a computer to provide a service of reducing power consumption, the service comprising:
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(a) converting in each awake period, an inactive state into an active state as a converted active state, wherein power consumption is greater in the active state than in the inactive state; (b) receiving, in the converted active state, a beacon frame as a received beacon frame; (c) when the beacon flame is received in the step (b), and if an interval value of an awake window, in which the active state is maintained for a predetermined time, among field values of the received beacon flame is valid, setting the awake window as a set awake window; (d1) counting the interval value in the set awake window; and (e) if the counting is finished in the step (d1), converting the awake window into the inactive state, wherein in the step (c) if the beacon frame is not received in the step (a) within a predetermined time, or if the beacon frame is received within the predetermined time and a length value of the awake window contained in the received beacon frame is not valid, the active state is converted into the inactive state. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification