Method for scheduling wake/sleep cycles by a central device in a wireless network
First Claim
1. A method for scheduling wake/sleep cycles by a central device in a wireless network comprising at least one mobile device, said method comprising:
- determining a system reference cycle as a minimum value of a delay constraint on a real-time service for each mobile device of said at least one mobile device that has a real-time service;
attributing a wake/sleep cycle length to each mobile device, wherein each wake/sleep cycle length is an integer multiple of the system reference cycle and wherein the integer value is varied to form a difference between the wake/sleep cycle length for each of the mobile devices;
assigning a sleep period and a wake period within the wake/sleep cycle of each mobile device using the predetermined wake/sleep cycle length; and
arranging the wake/sleep cycle of each mobile device to avoid collision of the wake period with those of other mobile devices.
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Abstract
A method for scheduling wake/sleep cycles by a central device in a wireless network is provided. The wireless network comprises at least one mobile device. The method comprises: attributing a wake/sleep cycle length to each mobile device, wherein the wake/sleep cycle length is an integer multiple of a system schedule cycle; assigning a sleep period and a wake period within the wake/sleep cycle of each mobile device; and arranging the wake/sleep cycle of each mobile device to avoid collision of the wake period with those of other mobile devices. The present invention can keep the maximum sleep cycle period of each MS to guarantee the QoS requirement and to efficiently utilize the system bandwidth.
24 Citations
18 Claims
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1. A method for scheduling wake/sleep cycles by a central device in a wireless network comprising at least one mobile device, said method comprising:
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determining a system reference cycle as a minimum value of a delay constraint on a real-time service for each mobile device of said at least one mobile device that has a real-time service; attributing a wake/sleep cycle length to each mobile device, wherein each wake/sleep cycle length is an integer multiple of the system reference cycle and wherein the integer value is varied to form a difference between the wake/sleep cycle length for each of the mobile devices; assigning a sleep period and a wake period within the wake/sleep cycle of each mobile device using the predetermined wake/sleep cycle length; and arranging the wake/sleep cycle of each mobile device to avoid collision of the wake period with those of other mobile devices. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for scheduling wake/sleep cycles of a mobile device, comprising:
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receiving from a central station scheduling data for a sleep/wake cycle, wherein the sleep/wake cycle length is defined as an integer multiple of a system reference cycle that is common for a plurality of mobile devices and that is set as a minimum value of a delay constraint on real-time service for each mobile device of said plurality of mobile devices that has a real-time service and wherein the integer value is varied between mobile devices to form a difference between the wake/sleep cycle length for each mobile device; and waking and setting to sleep the appropriate circuits as a function of the scheduling data using the predetermined sleep/wake cycle length. - View Dependent Claims (9, 10, 11)
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12. A central device for scheduling wake/sleep cycles in a wireless network comprising a plurality of mobile devices, said central device being configured to:
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determine a system reference cycle as a minimum value of a delay constraint on a real-time service for each mobile device of said plurality of mobile devices that has a real-time service; attribute a wake/sleep cycle length to each mobile device, wherein each wake/sleep cycle length is an integer multiple of a system reference cycle and wherein the integer value is varied to form a difference between the wake/sleep cycle length for each of the mobile devices; assign a sleep period and a wake period within the wake/sleep cycle of each mobile device using the predetermined wake/sleep cycle length; and arrange the wake/sleep cycle of each mobile device to avoid collision of the wake period with those of other mobile devices. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification