COMMUNICATION SYSTEM, BASE STATION APPARATUS, AND MOBILE STATION APPARATUS
First Claim
1. A communication system which performs radio communication between a base station apparatus and a mobile station apparatus using a plurality of frequency layers having frequency bands different from each other, whereinsaid base station apparatus assigns a downlink cell common control channel and a downlink cell common traffic channel to a low-frequency layer, and assigns a downlink cell dedicated control channel and a downlink cell dedicated traffic channel to a low-frequency layer and/or a high-frequency layer according to a downlink channel status and a communication requirement from said mobile station apparatus.
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Accused Products
Abstract
Utilizing a frequency-bandwidth limited IMT frequency band of 3 GHz, requirements of IMT-Advanced; that is, 100 Mbps for high speed movement and 1 Gbps for low speed movement in the downlink are satisfied. A communication system performs radio communication between a base station apparatus 40a and a mobile station apparatus 50 using a plurality of frequency layers having frequency bands different from each other, wherein the base station apparatus 40a assigns a downlink cell common control channel and a downlink cell common traffic channel to a low-frequency layer, and assigns a downlink cell dedicated control channel and a downlink cell dedicated traffic channel to a low-frequency layer and/or a high-frequency layer according to a downlink channel status and a communication requirement of the mobile station apparatus 50.
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Citations
9 Claims
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1. A communication system which performs radio communication between a base station apparatus and a mobile station apparatus using a plurality of frequency layers having frequency bands different from each other, wherein
said base station apparatus assigns a downlink cell common control channel and a downlink cell common traffic channel to a low-frequency layer, and assigns a downlink cell dedicated control channel and a downlink cell dedicated traffic channel to a low-frequency layer and/or a high-frequency layer according to a downlink channel status and a communication requirement from said mobile station apparatus.
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5. A base station apparatus which performs radio communication with a mobile station apparatus using a plurality of frequency layers having frequency bands different from each other, said base station apparatus comprising:
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a determination unit which determines a downlink channel status of said mobile station apparatus and a communication requirement of said mobile station apparatus; and a mapping unit which assigns a downlink cell common control channel and a downlink cell common traffic channel to a low-frequency layer and assigns a downlink cell dedicated control channel and a downlink cell dedicated traffic channel to a low-frequency layer and/or a high-frequency layer based on a downlink channel status of a mobile station apparatus and a communication requirement of said mobile station apparatus as a result of said determination. - View Dependent Claims (6, 7, 8)
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9. A mobile station apparatus which performs radio communication with a base station apparatus using a plurality of frequency layers having frequency bands different from each other, wherein said mobile station apparatus
receives from said base station apparatus a downlink cell common control channel and a downlink cell common traffic channel assigned to a low-frequency layer, and receives from said base station apparatus a downlink cell dedicated control channel and a downlink cell dedicated traffic channel assigned to a low-frequency layer and/or a high-frequency layer according to a downlink channel status and a communication requirement.
Specification