METHOD OF FREQUENCY CHANNEL ASSIGNMENT USING EFFECTIVE SPECTRUM SENSING IN MULTIPLE FREQUENCY ASSIGNMENT SYSTEM
First Claim
1. A channel assignment method applied to a Base Station (BS) of a secondary user to which a frequency channel licensed to a primary user is assigned in a multiple Frequency Assignment (FA) system, the method comprising:
- a channel sensing process, wherein the BS classifies multiple frequency channel licensed to the primary user into a plurality of channel state sets according to usage states, periodically senses channel states by changing a sensing period according to types of the classified channel state sets, and manages the sensed channel states as frequency channel state set information;
a channel state set broadcasting process, wherein the BS transmits the frequency channel state set information managed in the channel sensing process to secondary user terminals using a broadcast message; and
a channel assigning process, wherein if the BS receives a channel assignment request message from a new secondary user terminal which has received the broadcast message, the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the new secondary user terminal using the frequency channel state set information.
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Abstract
Provided is a method of assigning a frequency channel using efficient spectrum sensing in a multiple Frequency Assignment (FA) system. The method includes a channel sensing process, wherein abase station (BS) of a secondary user classifies multiple frequency channels licensed to a primary user into a plurality of channel states by changing a sensing period according to the types of classified channel state sets, and manages the sensed channel states as frequency channel state set information; a channel state set broadcasting process, wherein the BS transmits the frequency channel state set information manage d in the channel sensing process to secondary user terminals using a broadcast message; and a channel assigning process, wherein if the BS receives a channel assignment request message from a new secondary user terminal which has received the broadcast message, the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the new secondary user terminal using the frequency channel state set information. Accordingly, a frequency channel can be assigned to a secondary user requesting channel assignment using frequency channel state set information without a primary user experiencing interference noise.
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Citations
11 Claims
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1. A channel assignment method applied to a Base Station (BS) of a secondary user to which a frequency channel licensed to a primary user is assigned in a multiple Frequency Assignment (FA) system, the method comprising:
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a channel sensing process, wherein the BS classifies multiple frequency channel licensed to the primary user into a plurality of channel state sets according to usage states, periodically senses channel states by changing a sensing period according to types of the classified channel state sets, and manages the sensed channel states as frequency channel state set information; a channel state set broadcasting process, wherein the BS transmits the frequency channel state set information managed in the channel sensing process to secondary user terminals using a broadcast message; and a channel assigning process, wherein if the BS receives a channel assignment request message from a new secondary user terminal which has received the broadcast message, the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the new secondary user terminal using the frequency channel state set information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A channel assignment method applied to a terminal of a secondary user to which a frequency channel licensed to a primary user is assigned in a multiple Frequency Assignment (FA) system, the method comprising:
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a channel state set information receiving process, wherein the secondary user terminal receives frequency channel state set information of multiple frequency channels licensed to the primary user from a Base Station (BS) of the secondary user using a broadcast message and manages the received frequency channel state set information; a channel assigning process, wherein the secondary user terminal requests the BS for channel assignment using the frequency channel state set information and the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the secondary user terminal; and is a channel state set information reporting process, wherein the secondary user terminal periodically senses channel states of the multiple frequency channels licensed to the primary user by changing a sensing period according to types of channel state sets updates the frequency channel state set information according to the sensing result, and reports the updated frequency channel state set information to the BS. - View Dependent Claims (8, 9, 10, 11)
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Specification