Mobile wireless terminal apparatus and base station search method
First Claim
1. A mobile wireless terminal apparatus configured to wirelessly communicate with a base station, the apparatus comprising:
- a first communication module configured to detect a beacon signal from a wireless signal transmitted from the base station to a service area, and to determine movement into a new service area and movement to an outside of the service area, based on a variation of a reception timing of the beacon signal;
a second communication module configured to receive a wireless signal transmitted from the base station and to communicate with the base station by acquiring identification information of the base station from the wireless signal, the second communication module being greater in power consumption than the first communication module; and
a controller configured to activate the second communication module and cause the second communication module to acquire the identification information, when the movement to the new service area is determined by the first communication module;
wherein the first communication module comprises;
a beacon detection module configured to generate a plurality of reception profiles, each profile indicative of the reception timing of the wireless signal in a search window corresponding to a first cycle, to add wireless signals received at the same timing by overlapping the plurality of reception profiles, and to detect reception timings of the beacon signal by detecting added wireless signals exceeding a first value; and
a comparison module configured to;
compare a first list, comprising the first reception timing detected at a first timing, and a second list, comprising the second reception timing detected at a second timing after the first timing;
anddetermine the movement into the new service area and the movement to the outside of the service area, based on a difference between the first reception timing and the second reception timing.
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Abstract
According to one embodiment, a mobile wireless terminal apparatus includes a first communication module, a second communication module, and a controller. The first communication module is configured to detect a beacon signal from a wireless signal transmitted from the base station to a service area, and to determine movement into a new service area and movement to an outside of the service area, based on a variation of a reception timing of the beacon signal. The second communication module is configured to receive a wireless signal transmitted from the base station and to communicate with the base station by acquiring identification information of the base station from the wireless signal. The controller is configured to activate the second communication module and cause the second communication module to acquire the identification information, when the movement to the new service area is determined by the first communication module.
9 Citations
7 Claims
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1. A mobile wireless terminal apparatus configured to wirelessly communicate with a base station, the apparatus comprising:
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a first communication module configured to detect a beacon signal from a wireless signal transmitted from the base station to a service area, and to determine movement into a new service area and movement to an outside of the service area, based on a variation of a reception timing of the beacon signal; a second communication module configured to receive a wireless signal transmitted from the base station and to communicate with the base station by acquiring identification information of the base station from the wireless signal, the second communication module being greater in power consumption than the first communication module; and a controller configured to activate the second communication module and cause the second communication module to acquire the identification information, when the movement to the new service area is determined by the first communication module; wherein the first communication module comprises; a beacon detection module configured to generate a plurality of reception profiles, each profile indicative of the reception timing of the wireless signal in a search window corresponding to a first cycle, to add wireless signals received at the same timing by overlapping the plurality of reception profiles, and to detect reception timings of the beacon signal by detecting added wireless signals exceeding a first value; and a comparison module configured to; compare a first list, comprising the first reception timing detected at a first timing, and a second list, comprising the second reception timing detected at a second timing after the first timing; and determine the movement into the new service area and the movement to the outside of the service area, based on a difference between the first reception timing and the second reception timing. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A base station search method of a mobile wireless terminal apparatus configured to wirelessly communicate with a base station in a network, the method comprising:
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detecting, at a first communication module, a beacon signal from a wireless signal transmitted from the base station to a service area; generating a plurality of reception profiles, each profile indicative of the reception timing of the wireless signal in a search window corresponding to a first cycle; adding wireless signals received at the same timing by overlapping the plurality of reception profiles; detecting reception timings of the beacon signal by detecting added wireless signals exceeding a first value; comparing a first list, comprising the first reception timing detected at a first timing, and a second list, comprising the second reception timing detected at a second timing after the first timing; determining movement to a new service area and movement to an outside of the service area, based on a difference between the first reception timing and the second reception timing; activating a second communication module having a greater power consumption than the first communication module, when the movement to the new service area is determined by the first communication module; receiving, at the second communication module, a wireless signal transmitted from the base station; and acquiring identification information of the base station.
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Specification