Method for providing multi-level access services in common access channel
First Claim
1. A method for performing handover by a subscriber station in a mobile communication system, the method comprising the steps of:
- receiving, from a base station, a plurality of backoff domains including backoff start information and backoff end information for each of rangings;
transmitting a ranging request message to the base station;
selecting one of the plurality of backoff domains according to whether a ranging response message is received from the base station in a predetermined time; and
determining a backoff value for handover based on the backoff start information and the backoff end information including the selected backoff domain,wherein the selected backoff domain is selected based on a ranging priority level that is determined according to a service quality level of data provided to the subscriber station and whether handover of the subscriber station is performed.
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Abstract
The present invention relates to a method for performing a ranging operation according to the priority order in a mobile communication system using a BWA (Broadcast Wireless Access) scheme. The method according to the invention for performing a range operation by a subscriber terminal in a mobile communication system using the BWA (Broadcast Wireless Access) scheme comprises steps of: receiving backoff domains having the start and end values of the backoff corresponding to each ranging operation, the backoff domains being determined from a base station according to the priority order of the ranging operations between the base station and subscriber terminals; performing a ranging operation and, if it is determined that the step of performing the ranging operation fails, selecting backoff domains among the received backoff domains according to the priority order of the performed ranging operations; and, re-performing the ranging operation according to the selected backoff domains.
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Citations
22 Claims
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1. A method for performing handover by a subscriber station in a mobile communication system, the method comprising the steps of:
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receiving, from a base station, a plurality of backoff domains including backoff start information and backoff end information for each of rangings; transmitting a ranging request message to the base station; selecting one of the plurality of backoff domains according to whether a ranging response message is received from the base station in a predetermined time; and determining a backoff value for handover based on the backoff start information and the backoff end information including the selected backoff domain, wherein the selected backoff domain is selected based on a ranging priority level that is determined according to a service quality level of data provided to the subscriber station and whether handover of the subscriber station is performed. - View Dependent Claims (2, 7, 8, 14)
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3. A subscriber station for performing handover in a mobile communication system, the subscriber station comprising:
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a receiver for receiving, from a base station, a plurality of backoff domains including backoff start information and backoff end information for each of rangings; a transmitter for transmitting a ranging request message to the base station; and a controller for selecting one of the plurality of backoff domains according to whether a ranging response message is received from the base station in a predetermined time, and determining a backoff value for handover according to the backoff start information and the backoff end information including the selected backoff domain, wherein the selected backoff domain is selected based on a ranging priority level that is determined according to a service quality level of data provided to the subscriber station and whether handover of the subscriber station is performed. - View Dependent Claims (4, 5, 6, 21)
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9. A base station for performing handover in a mobile communication system, the base station comprising:
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a transmitter for transmitting, to a subscriber station, a plurality of backoff domains including backoff start information and backoff end information for each of rangings, and a ranging response message according to a reception of a ranging request message; and a receiver for receiving the ranging request message from the subscriber station, wherein one of the plurality of backoff domains is selected by the subscriber station according to whether the ranging response message is received from the base station in a predetermined time, and wherein the selected backoff domain is selected based on a ranging priority level that is determined according to a service quality level of data provided to the subscriber station and whether handover of the subscriber station is performed. - View Dependent Claims (10, 11, 12, 13, 22)
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15. A method for performing handover by a base station in a mobile communication system, the method comprising the steps of:
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transmitting, to a subscriber station, a plurality of backoff domains including backoff start information and backoff end information for each of rangings; and transmitting a ranging response message to the subscriber station, if a ranging request message is received from the subscriber station, wherein one of the plurality of backoff domains is selected by the subscriber station according to whether the ranging response message is received from the base station in a predetermined time, and wherein the selected backoff domain is selected based on a ranging priority level that is determined according to a service quality level of data provided to the subscriber station and whether handover of the subscriber station is performed. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification