Band control method and communication apparatus
First Claim
1. A frequency bandwidth control method for controlling a frequency bandwidth when a first communication apparatus and a second communication apparatus communicate with full duplex by using two or more divided frequency bandwidths within a previously allocated whole frequency bandwidth, whereinfrequency bandwidths which said first communication apparatus and said second communication apparatus use at data transmission are different frequency bandwidths, the bandwidth control method comprising the steps of:
- a bandwidth presumption step for presuming a first bandwidth required by said first communication apparatus at data transmission and a second bandwidth required by said second communication apparatus at data transmission;
a bandwidth comparison step for comparing said first bandwidth with a first bandwidth used which said first communication apparatus currently uses and comparing said second bandwidth with a second bandwidth used which said second communication apparatus currently uses; and
a bandwidth used determination step for determining a third bandwidth used by said first communication apparatus at data transmission and a fourth bandwidth used by said second communication apparatus at data transmission according to comparison results obtained by said bandwidth comparison step, wherein said determining said third bandwidth and said fourth bandwidth comprises;
if said first bandwidth is less than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, determining said third bandwidth to be equal to said first bandwidth and determining said fourth bandwidth to be equal to said whole frequency bandwidth less said third bandwidth,if said first bandwidth is greater than said first bandwidth used and said second bandwidth is less than said second bandwidth used, determining said fourth bandwidth to be equal to said second bandwidth and determining said third bandwidth to be equal to said whole frequency bandwidth less said fourth bandwidth,if said first bandwidth is greater than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, determining said third bandwidth and said fourth bandwidth such that a ratio of said first bandwidth to said second bandwidth is the same as a ratio of said third bandwidth to said fourth bandwidth, andif said first bandwidth is less than or equal to said first bandwidth used and said second bandwidth is less than or equal to said second bandwidth used, determining said third bandwidth to be equal to said first bandwidth used and determining said fourth bandwidth to be equal to said second bandwidth used;
a first communication step for transmitting data by using said third bandwidth and for receiving data by using said fourth bandwidth, in said first communication apparatus; and
a second communication step for transmitting data by using said fourth bandwidth and for receiving data by using said third bandwidth, in said second communication apparatus.
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Abstract
The present invention intends to improve communication efficiency between two communication apparatuses each engaged in the communication by full duplex communication method by using a surplus band of the one to transmission band of the other. A first bandwidth required by a first communication apparatus (A) at data transmission and a second bandwidth required by a second communication apparatus (B) at data transmission are presumed. Next, the first bandwidth presumed as mentioned is compared to a first bandwidth used which the first communication apparatus (A) currently uses and at the same time, the second bandwidth presumed as mentioned is compared to a second bandwidth used which the second communication apparatus (B) currently uses. The first bandwidth and the second bandwidth are then adjusted, and a third bandwidth which the first communication apparatus (A) uses at data transmission and a fourth bandwidth which the second communication apparatus (B) uses are determined.
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Citations
20 Claims
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1. A frequency bandwidth control method for controlling a frequency bandwidth when a first communication apparatus and a second communication apparatus communicate with full duplex by using two or more divided frequency bandwidths within a previously allocated whole frequency bandwidth, wherein
frequency bandwidths which said first communication apparatus and said second communication apparatus use at data transmission are different frequency bandwidths, the bandwidth control method comprising the steps of: -
a bandwidth presumption step for presuming a first bandwidth required by said first communication apparatus at data transmission and a second bandwidth required by said second communication apparatus at data transmission; a bandwidth comparison step for comparing said first bandwidth with a first bandwidth used which said first communication apparatus currently uses and comparing said second bandwidth with a second bandwidth used which said second communication apparatus currently uses; and a bandwidth used determination step for determining a third bandwidth used by said first communication apparatus at data transmission and a fourth bandwidth used by said second communication apparatus at data transmission according to comparison results obtained by said bandwidth comparison step, wherein said determining said third bandwidth and said fourth bandwidth comprises; if said first bandwidth is less than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, determining said third bandwidth to be equal to said first bandwidth and determining said fourth bandwidth to be equal to said whole frequency bandwidth less said third bandwidth, if said first bandwidth is greater than said first bandwidth used and said second bandwidth is less than said second bandwidth used, determining said fourth bandwidth to be equal to said second bandwidth and determining said third bandwidth to be equal to said whole frequency bandwidth less said fourth bandwidth, if said first bandwidth is greater than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, determining said third bandwidth and said fourth bandwidth such that a ratio of said first bandwidth to said second bandwidth is the same as a ratio of said third bandwidth to said fourth bandwidth, and if said first bandwidth is less than or equal to said first bandwidth used and said second bandwidth is less than or equal to said second bandwidth used, determining said third bandwidth to be equal to said first bandwidth used and determining said fourth bandwidth to be equal to said second bandwidth used; a first communication step for transmitting data by using said third bandwidth and for receiving data by using said fourth bandwidth, in said first communication apparatus; and a second communication step for transmitting data by using said fourth bandwidth and for receiving data by using said third bandwidth, in said second communication apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication apparatus for performing data transmission by controlling frequency bandwidth when data communication is performed with an other communication apparatus with full duplex by using two or more divided frequency bandwidths within a previously allocated whole frequency bandwidth, wherein
frequency bandwidths which said communication apparatus and said other communication apparatus use at data transmission are different frequency bandwidths, the communication apparatus comprising: -
bandwidth presumption means for presuming a first bandwidth which is required by said communication apparatus at data transmission; bandwidth acquisition means for acquiring a second bandwidth from said other communication apparatus which is required by said other communication apparatus at data transmission; bandwidth comparison means for comparing said first bandwidth with a first bandwidth used which said first communication apparatus currently uses, and comparing said second bandwidth with a second bandwidth used which said second communication apparatus currently uses; and bandwidth used determination means for determining a third bandwidth used by said first communication apparatus at data transmission and a fourth bandwidth used by said second communication apparatus at data transmission according to comparison results obtained by said bandwidth comparison means, wherein said third bandwidth and said fourth bandwidth are determined such that; if said first bandwidth is less than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, said third bandwidth is determined to be equal to said first bandwidth and said fourth bandwidth is determined to be equal to said whole frequency bandwidth less said third bandwidth, if said first bandwidth is greater than said first bandwidth used and said second bandwidth is less than said second bandwidth used, said fourth bandwidth is determined to be equal to said second bandwidth and said third bandwidth is determined to be equal to said whole frequency bandwidth less said fourth bandwidth, if said first bandwidth is greater than said first bandwidth used and said second bandwidth is greater than said second bandwidth used, said third bandwidth and said fourth bandwidth are determined such that a ratio of said first bandwidth to said second bandwidth is the same as a ratio of said third bandwidth to said fourth bandwidth, and if said first bandwidth is less than or equal to said first bandwidth used and said second bandwidth is less than or equal to said second bandwidth used, said third bandwidth is determined to be equal to said first bandwidth used and said fourth bandwidth is determined to be equal to said second bandwidth used, wherein said communication apparatus transmits data by using said third bandwidth and receives data by using said fourth bandwidth and said other communication apparatus transmits data by using said fourth bandwidth and receives data by using said third bandwidth. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification